SIST ES 283 002 V2.1.0:2008
Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN) - H.248 Profile for controlling Access and Residential Gateways
Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN) - H.248 Profile for controlling Access and Residential Gateways
The WI will create a new version of the AGW profile. The scope of the new version is to cleanup omissions, flaws and provide clarifications on issues that have arisen due to operational experience to version 1 of the profile. An example of such a flaw/clarification is to better describe how ISDN p-type frames and f-type frames from different interfaces at the AGW to an packet handler interface can be distinguished and transported reliable. Additionally the profile should adopt the H.248.1 version 3 profile template that all the other TISPAN profiles.
Zlite telekomunikacijske in internetne storitve ter protokoli za napredno omreženje (TISPAN) - Profil H.248 za krmiljenje dostopovnih in rezidenčnih prehodov
General Information
Standards Content (Sample)
Final draft ETSI ES 283 002 V2.1.0 (2008-01)
ETSI Standard
Telecommunications and Internet converged Services and
Protocols for Advanced Networking (TISPAN);
H.248 Profile for controlling
Access and Residential Gateways
2 Final draft ETSI ES 283 002 V2.1.0 (2008-01)
Reference
RES/TISPAN-03103-NGN-R2
Keywords
H.248, ISDN, PSTN, signalling
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3 Final draft ETSI ES 283 002 V2.1.0 (2008-01)
Contents
Intellectual Property Rights.6
Foreword.6
1 Scope.7
1.1 Differences between H.248 ARGW Profiles Version 1 and Version 2.7
2 References.7
2.1 Normative references.7
2.2 Informative references.10
3 Definitions and abbreviations.10
3.1 Definitions.10
3.2 Abbreviations.11
4 Applicability.12
4.1 Architecture.12
4.2 Functional requirements.13
5 Profile description .13
5.1 Profile identification.13
5.2 Summary.13
5.3 Gateway control protocol version.14
5.4 Connection model.14
5.5 Context attributes.15
5.6 Terminations.15
5.6.1 Termination names.15
5.6.1.1 Physical terminations.15
5.6.1.2 Ephemeral terminations.16
5.6.2 Multiplexed terminations.16
5.7 Descriptors.16
5.7.1 Stream descriptor.16
5.7.1.1 LocalControl Descriptor.16
5.7.2 Events descriptor.17
5.7.3 EventBuffer descriptor.18
5.7.4 Signals descriptor.18
5.7.5 DigitMap descriptor.19
5.7.6 Statistics descriptor.19
5.7.7 ObservedEvents descriptor.20
5.7.8 Topology descriptor.20
5.7.9 Error descriptor.20
5.8 Command API.20
5.8.1 Add.20
5.8.2 Modify.20
5.8.3 Subtract.21
5.8.4 Move.21
5.8.5 AuditValue.21
5.8.6 AuditCapabilities .21
5.8.7 ServiceChange.21
5.8.8 Manipulating and auditing context attributes.22
5.9 Generic command syntax and encoding.22
5.10 Transactions.23
5.11 Messages.23
5.12 Transport.24
5.13 Security.25
5.14 Packages.25
5.14.1 Overview.25
5.14.2 Package usage information .27
5.14.2.1 Generic (g).28
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4 Final draft ETSI ES 283 002 V2.1.0 (2008-01)
5.14.2.2 Base root (root) .29
5.14.2.3 Call progress tones generator (cg).30
5.14.2.4 Media gateway overload control (ocp).31
5.14.2.5 Network (nt).32
5.14.2.6 TDM circuit (tdmc).33
5.14.2.7 RTP (rtp) .34
5.14.2.8 Extended DTMF detection (xdd) .35
5.14.2.9 Basic services tones generator (srvtn).36
5.14.2.10 Expanded call progress tones generator (xcg).37
5.14.2.11 Enhanced alerting (alert) .38
5.14.2.12 Analog display signalling (andisp).39
5.14.2.13 Generic announcement (an) .40
5.14.2.14 Analog line supervision (al) .41
5.14.2.15 Extended analog line supervision (xal) .42
5.14.2.16 Automatic metering (amet).43
5.14.2.17 Intrusion tones generation (int) .44
5.14.2.18 Business tones generation (biztn).45
5.14.2.19 Differentiated Services (ds).46
5.14.2.20 Quality alert ceasing (qac) .46
5.14.2.21 Inactivity timer (it) .47
5.14.2.22 Call type discrimination (ctyp).48
5.14.2.23 Stimulus analog line (stimal).50
5.14.2.24 MGC information (MGCInfo) .51
5.14.2.25 Statistic Conditional Reporting (scr).52
5.14.2.26 ETSI Notification Rate Package (etsi_nr) .53
5.15 Mandatory support of SDP and annex C information elements .53
5.16 Procedures.56
6 Procedures at the IP side .56
6.1 General procedures.56
6.2 VoiceBand Data (VBD) .56
6.3 Support of ISDN unrestricted 64 kbit/s .57
6.4 Comfort noise insertion and silence suppression.57
6.5 DTMF transmission.58
6.6 Call progress tones .58
6.7 Support of G.711 variants .58
6.7.1 G.711 encoding law .58
6.7.2 G.711 silence suppression mode.58
6.7.3 G.711 packet loss concealment.59
6.8 MG-Internal redirection of RTP traffic .59
7 Procedures for Physical H.248 terminations .59
7.1 General procedures.59
7.1.1 Initial configuration.59
7.1.2 DTMF detection.60
7.1.3 Sending of tones .60
7.1.4 Sending of announcements .60
7.1.5 Support of emergency calls.61
7.1.6 Echo control.61
7.2 Specific procedures for analog lines.61
7.2.1 Autonomous actions.62
7.2.2 Alerting.62
7.2.3 Automatic metering.62
7.2.4 Display service.62
7.2.4.1 On hook data transmission .62
7.2.4.2 Off hook data transmission: .63
7.3 Specific procedures for ISDN interfaces .63
7.3.1 General.63
7.3.2 ISDN-BA signalling.63
7.3.2.1 Discrimination of s-type frames (layer 2 call control signalling).64
7.3.2.2 Discrimination of p-type frames .64
7.3.2.3 Discrimination of f-type frames .64
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5 Final draft ETSI ES 283 002 V2.1.0 (2008-01)
7.3.2.4 SCTP Association establishment .64
7.3.2.4.1 IUA/SCTP for Q.931 call control signalling traffic .64
7.3.2.4.2 IUA/SCTP for X.25 or frame relay traffic.64
7.3.3 ISDN-PRA signalling.65
7.3.4 NMDS.65
7.3.5 ISDN management.65
7.4 Specific procedures for V5 interfaces .65
7.4.1 General.65
7.4.2 V5 signalling.65
7.4.3 Handling of p- and f-type frames.65
8 MG and MGC management and call-independent procedures .66
8.1 Overload control.66
8.1.1 Notification Behaviour.66
8.1.2 Adaptive Rate Based.67
8.2 IP QoS control and monitoring.67
8.3 Testing of analog and digital lines.67
8.4 Real Time Statistics Reporting.67
Annex A (informative): Comparison with H.248 ARGW Profile Version 1.68
A.1 General.68
A.2 Differences between H.248 ARGW Profiles Version 1 and Version 2.68
Annex B (informative): Bibliography.69
History .70
ETSI
6 Final draft ETSI ES 283 002 V2.1.0 (2008-01)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This ETSI Standard (ES) has been produced by ETSI Technical Committee Telecommunications and Internet
converged Services and Protocols for Advanced Networking (TISPAN), and is now submitted for the ETSI standards
Membership Approval Procedure.
ETSI
7 Final draft ETSI ES 283 002 V2.1.0 (2008-01)
1 Scope
The present document defines a profile of the Gateway Control Protocol (H.248.1), for controlling access and
residential gateways connecting analog lines and ISDN primary and basic accesses, in order to emulate PSTN/ISDN
services over IP.
1.1 Differences between H.248 ARGW Profiles Version 1 and
Version 2
The differences between both H.248 profile versions are detailed in annex A.
Summary list of differences:
1) Package usage details (see clause 5.14.2).
2) IUA/SCTP encapsulation for Q.921 p-/f-type frames in IP domain (see clause 7.3.2).
3) Additional V5 support (see clause 7.4).
4) Adaptive-rate based MGC overload control (see clause 8.1.2).
5) Real time statistics reporting (see clause 8.4).
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the purposes
of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ETSI ES 282 001: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); NGN Functional Architecture Release 1".
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8 Final draft ETSI ES 283 002 V2.1.0 (2008-01)
[2] ETSI ES 282 002: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); PSTN/ISDN Emulation Sub-system (PES); Functional
architecture".
[3] ETSI ES 201 970: "Access and Terminals (AT); Public Switched Telephone Network (PSTN);
Harmonized specification of physical and electrical characteristics at a 2-wire analogue presented
Network Termination Point (NTP)".
[4] ETSI EN 300 659-1: "Access and Terminals (AT); Analogue access to the Public Switched
Telephone Network (PSTN); Subscriber line protocol over the local loop for display (and related)
services; Part 1: On-hook data transmission".
[5] ETSI EN 300 659-2: "Access and Terminals (AT); Analogue access to the Public Switched
Telephone Network (PSTN); Subscriber line protocol over the local loop for display (and related)
services; Part 2: Off-hook data transmission".
[6] ETSI ETS 300 099: "Integrated Services Digital Network (ISDN); Specification of the Packet
Handler access point Interface (PHI)".
[7] ETSI EN 301 141-1: "Integrated Services Digital Network (ISDN); Narrowband Multi-service
Delivery System (NMDS); Part 1: NMDS interface specification".
[8] ETSI ETS 300 402-2: "Integrated Services Digital Network (ISDN); Digital Subscriber Signalling
System No. one (DSS1) protocol; Data link layer; Part 2: General protocol specification [ITU-T
Recommendation Q.921 (1993), modified]".
[9] ETSI EN 300 367: "Integrated Services Digital Network (ISDN); Explicit Call Transfer (ECT)
supplementary service; Service description".
[10] ETSI TS 102 333: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Gate control protocol".
[11] ITU-T Recommendation H.248.45: "Gateway control protocol: MGC information package".
[12] IETF RFC 4233 (2006-01): "Integrated Services Digital Network (ISDN) Q.921-User Adaptation
Layer".
[13] ETSI TBR 003: "Integrated Services Digital Network (ISDN); Attachment requirements for
terminal equipment to connect to an ISDN using ISDN basic access".
[14] ETSI TBR 004: "Integrated Services Digital Network (ISDN); Attachment requirements for
terminal equipment to connect to an ISDN using ISDN primary rate access".
[15] ITU-T Recommendation H.248.1 + Corrigendum 1: "Gateway control protocol: Version 2".
[16] ITU-T Recommendation H.248.2: "Gateway control protocol: Facsimile, text conversation and
call discrimination packages".
[17] ITU-T Recommendation H.248.4 + Corrigendum 1: "Gateway control protocol: Transport over
Stream Control Transmission Protocol (SCTP)".
[18] ITU-T Recommendation H.248.7: "Gateway control protocol: Generic Announcement package".
[19] ITU-T Recommendation H.248.11: "Gateway control protocol: Media gateway overload control
package".
[20] ITU-T Recommendation H.248.13: "Gateway control protocol: Quality Alert Ceasing package".
[21] ITU-T Recommendation H.248.14: "Gateway control protocol: Inactivity timer package".
[22] ITU-T Recommendation H.248.16 + Corrigendum 1: "Gateway control protocol: Enhanced digit
collection packages and procedures".
[23] ITU-T Recommendation H.248.23: "Gateway control protocol: Enhanced Alerting packages".
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9 Final draft ETSI ES 283 002 V2.1.0 (2008-01)
[24] ITU-T Recommendation H.248.26 + Amendment 1: "Gateway control protocol: Enhanced analog
lines packages".
[25] ITU-T Recommendation H.248.34: "Gateway control protocol: Stimulus analogue lines package".
[26] ITU-T Recommendation Q.1950: "Bearer independent call bearer control protocol".
[27] ITU-T Recommendation G.711: "Pulse code modulation (PCM) of voice frequencies".
[28] ITU-T Recommendation G.711 Appendix I: "A high quality low-complexity algorithm for packet
loss concealment with G.711".
[29] ITU-T Recommendation G.711 Appendix II: "A comfort noise payload definition for ITU-T
G.711 use in packet-based multimedia communication systems".
[30] ITU-T Recommendation T.38: "Procedures for real-time Group 3 facsimile communication over
IP networks".
[31] ITU-T Recommendation V.150.1: "Modem-over-IP networks: Procedures for the end-to-end
connection of V-series DCEs".
[32] ITU-T Recommendation V.152: "Procedures for supporting voice-band data over IP networks".
[33] ITU-T Recommendation E.180: "Technical characteristics of tones for the telephone service".
[34] IETF RFC 2327: "SDP: Session Description Protocol".
[35] IETF RFC 3551: "RTP Profile for Audio and Video Conferences with Minimal Control".
[36] IETF RFC 4301: "Security Architecture for the Internet Protocol".
[37] IETF RFC 4733: "RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals".
[38] IETF RFC 2784: "Generic Routing Encapsulation (GRE)".
[39] IETF RFC 4040: "RTP Payload Format for a 64 kbit/s Transparent Call".
[40] IETF RFC 4855: "Media Type Registration of RTP Payload Formats".
[41] ITU-T Recommendation G.168: "Digital network echo cancellers".
[42] IETF RFC 2733: "An RTP Payload Format for Generic Forward Error Correction".
[43] IETF RFC 2198: "RTP Payload for Redundant Audio Data".
[44] ITU-T Recommendation Q.115.0: "Protocols for the control of signal processing network elements
and functions".
[45] ITU-T Recommendation Q.115.1: "Logic for the control of echo control devices and functions".
[46] ITU-T Recommendation Q.921: "ISDN user-network interface - Data link layer specification".
[47] ETSI ETS 300 297: "Integrated Services Digital Network (ISDN); Access digital section for ISDN
basic access".
[48] ETSI ETS 300 233: "Integrated Services Digital Network (ISDN); Access digital section for ISDN
primary rate".
[49] ITU-T Recommendation H.248.17: "Gateway control protocol: Line test packages".
[50] ETSI ES 201 235-3: "Access and Terminals (AT); Specification of Dual-Tone Multi-Frequency
(DTMF) Transmitters and Receivers; Part 3: Receivers".
[51] IETF RFC 3389: "Real-time Transport Protocol (RTP) Payload for Comfort Noise (CN)".
[52] ETSI ES 283 002 (V1.1.1): "Telecommunications and Internet converged Services and Protocols
for Advanced Networking (TISPAN); PSTN/ISDN Emulation Subsystem (PES); NGN Release 1
H.248 Profile for controlling Access and Residential Gateways".
ETSI
10 Final draft ETSI ES 283 002 V2.1.0 (2008-01)
[53] IETF RFC 3807 (2004): "V5.2-User Adaptation Layer (V5UA)".
[54] ETSI EN 300 324-1: "V interfaces at the digital Local Exchange (LE); V5.1 interface for the
support of Access Network (AN); Part 1: V5.1 interface specification".
[55] ETSI EN 300 347-1: "V interfaces at the digital Local Exchange (LE); V5.2 interface for the
support of Access Network (AN); Part 1: V5.2 interface specification".
[56] ITU-T Recommendation H.248.47 (2007-01): "Gateway control protocol: Statistic conditional
reporting package".
[57] ETSI ES 283 039-4 (V2.1.1): "Telecommunications and Internet converged Services and Protocols
for Advanced Networking (TISPAN); NGN Overload Control Architecture; Part 4: Adaptative
Control for the MGC".
[58] IETF RFC 2960: "Stream Control Transmission Protocol".
[59] ETSI TS 102 144: "Services and Protocols for Advanced Networks (SPAN); MTP/SCCP/SSCOP
and SIGTRAN (Transport of SS7 over IP); Stream Control Transmission Protocol (SCTP)
[Endorsement of RFC 2960 and RFC 3309, modified]".
2.2 Informative references
[60] ETSI TR 183 025 (V2.0.0): "Telecommunications and Internet converged Services and Protocols
for Advanced Networking (TISPAN); H.248 Non-call related procedures and management system
interaction".
[61] ETSI TR 183 040 (V1.1.1): "Telecommunications and Internet converged Services and Protocols
for Advanced Networking (TISPAN); H.248 POTS Message Flows based on the H.248 Profile for
controlling Access and Residential Gateways".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document the terms and definitions given in ITU-T Recommendation H.248.1 [15] and
the following apply:
Access GateWay (AGW): Media Gateway that interworks a significant number of analogue lines to a packet network
and is located at the operator's premises. See also clause 3.1of ITU-T Recommendation H.248.1
IP Port: source and destination port numbers for UDP, SCTP and TCP traffic
Media GateWay (MGW): refers both to Access Media Gateways and to Residential Media Gateways
NOTE: See ITU-T Recommendation H.248.1 [15].
MG Port: single physical access interface at a Media Gateway. This is always a circuit-oriented interface in the scope
of this H.248 Profile
NOTE: There are therefore three port types: analog port, ISDN Basic Rate Access port and Primary Rate Access
Port.
originating Media Gateway: Media Gateway to which the calling party's physical termination is connected
Residential GateWay (RGW): Media Gateway that interworks a small number of analogue lines
NOTE: A residential media gateway typically contains one or two analogue lines and is located at the customer
premises. See also clause 3.6 of ITU-T Recommendation H.248.1 [15].
terminating Media Gateway: Media Gateway to which the called party's physical termination is connected
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11 Final draft ETSI ES 283 002 V2.1.0 (2008-01)
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ACO Address COmplete message
AGCF Access Gateway Control Function
AGW Access GateWay
A-MGF Access-MGF
AN Access Node
BA Basic Access
CDR Call Detail Record
CN Comfort Noise
CRC Cyclic Redundancy Check
DLCI Data Link Connection endpoint Identifier
DNS Domain Name System
DTMF Dual Tone Multi Frequency
ECD Echo Control Device
FEC Forward Error Correction
FECD Full ECD
FH Frame Handler
GRE Generic Routing Encapsulation
HECD Half-way ECD
IECD Incoming ECD
IID IUA Interface Identifier
IP Internet Protocol
IPsec IP security
ISDN Integrated Services Digital Network
ISUP ISDN User Part
IUA ISDN Q.921-User Adaptation
MGW Media GateWay
MGC Media Gateway Controller
MGF Media Gateway Function
MID Message Identifier
NAT Network Address Translation
NMDS Narrowband Multi-service Delivery System
NT1 Network Termination (type 1)
NTN Network Terminating Node
OAM Operation, Administration and Maintenance
OECD Outgoing ECD
PBX Private Branch eXchange
PES PSTN/ISDN Emulation Subsystem
PH Packet Handler
PLC Packet Loss Concealment
PLP Packet Layer Procedures
PRA Primary Rate Access
PT Payload Type
QoS Quality of Service
RFC Request For Comments (IETF)
RGW Residential GateWay
R-MGF Residential-MGF
RTP Real-time Transport Protocol
SAPI Service Access Point Identifier
SCTP Stream Control Transmission Protocol
SDP Session Description Protocol
SPNE Signal Processing Network Equipment
SRV SeRVer
SSRC Synchronization SouRCe
TAS Terminal Alerting Signal
TCP Transmission Control Protocol
TE Terminal Equipment
TEI TE Identifier
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12 Final draft ETSI ES 283 002 V2.1.0 (2008-01)
TLS Transport Layer Security
TTL Time To Live
UDP User Datagram Protocol
VBD VoiceBand Data
VoIP Voice over IP
V5UA V5.2 - User Adaptation Layer
4 Applicability
4.1 Architecture
Figure 1 illustrates the architecture assumed in the present document. The Media Gateway Controller (MGC) resides in
a control subsystem and may be implemented as a stand-alone piece of equipment or as a component of a call server.
Access to the IP network is provided to analog terminals, ISDN terminals, analog and ISDN Private Branch Exchanges
(PBX), V5.1 and V5.2 access nodes (AN) through residential gateways or access gateways, which support one or more
of the following reference points:
• The Z reference point for analogue terminations.
• The T reference point for Primary Rate Access.
• The S/T reference point for Basic Rate Access.
• The T* reference point for NMDS Access, as defined in EN 301 141-1 [7].
• The V5.1 reference point for V5.1 Access, as defined in EN 300 324-1 [54].
• The V5.2 reference point for V5.2 Access, as defined in EN 300 347-1 [55].
Customer’s Premises Operator’s Premises
Control Subsystem
Scope of this
specification
AGW
IP Transport (Access and Core Network)
RGW
NOTE: V5 interfaces are supported by this profile, but not indicated in this drawing. The V5 access nodes would
be located in the operator’s premises, in front of the AGW.
Figure 1: Reference architecture
ETSI
Legacy User Equipment
(terminals, PBXs)
13 Final draft ETSI ES 283 002 V2.1.0 (2008-01)
The present document does not make any assumption on the structure of the control subsystem hosting the MGC
functionality. In the context of the TISPAN NGN Architecture (see ES 282 001 [1]), the control subsystem is the
PSTN/ISDN Emulation Subsystem (PES) (see ES 282 002 [2]). Within this subsystem, the AGCF plays the MGC role.
The RGW and the AGW implement the R-MGF and A-MGF functional entities (respectively).
The area shown within the dashed lines, including part of the equipment placed on customer premises as a RGW, is
considered to be under the control of a single operator. The use of IPSec (see RFC 4301 [36] or other security measures
to create such a control area is outside the scope of the present document.
4.2 Functional requirements
Support of the packages identified in the profile definition implies support of the underlying functionalities. This clause
identifies additional functional requirements that media gateways conforming to the present document shall comply
with:
• Media Gateways shall support IPv4 and may support IPv6.
• Media Gateways shall support for ITU-T Recommendation G.711 [27] A-law voice codec and may support
other codecs.
NOTE: Other mandatory codecs may also be required depending on the architecture in which media gateways are
used.
• Media Gateways shall support autonomous transition from Audio Mode to
ITU-T Recommendation G.711 [27]-based VBD Mode (according to ITU-T Recommendation V.152 [32])
upon detection of fax modem, text modem or data modem traffic.
• Media Gateways supporting other codecs than ITU-T Recommendation G.711 [27] shall also support the
procedures defined in RFC 4733 [37] to generate, detect and forward DTMF digits. DTMF shall be identified
by name (see mode "Named Telephone Events" in clause 3/RFC 4733 [37]), as opposed to their waveform
properties.
• All properties of tones requested by the MGC shall be provisioned in the Media Gateway. The MGC is not
required to send the physical characteristics of tones to Media Gateways.
• Where a RGW also provides customer access via a Network Address Translation (NAT) device, the design of
the NAT function shall be such that it does not interfere with, and explicitly takes account of, the operation of
the H.248 gateway function in the RGW.
5 Profile description
5.1 Profile identification
Table 1 provides the name and version of the profile that is sent in the service change command.
Table 1
Profile name: ETSI_ARGW
Version: 2
5.2 Summary
The profile defined in the present document enables the control of residential and access media gateways connecting
analog and ISDN lines to an IP transport domain, in order to emulate PSTN/ISDN services.
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14 Final draft ETSI ES 283 002 V2.1.0 (2008-01)
5.3 Gateway control protocol version
Version 2 shall be the minimum version supported. Support of this version implies conformance to
ITU-T Recommendation H.248.1 Version 2 and Corrigendum 1 [15] to this Recommendation, and implementation of
the corrections available in the latest version of the H.248 Implementors' Guide.
Version 3 may be required if automatic metering requires iteration notification and/or if the "one way external"
topology configuration is supported. Support of this version implies conformance to ITU-T Recommendation H.248.1
Version 3 (see bibliography). However, only "onIteration" in the NotifyComplete flag, "oneWayExternal" in the
Topology Descriptor and "neverNotify" of the NotifyBehaviour parameter are required from this Recommendation.
5.4 Connection model
Media Gateways shall support ephemeral terminations that sink and source RTP traffic. This type of H.248 termination
is denoted RTP in the following clauses.
Media Gateways shall also support at least one of the following types of physical terminations:
• ANALOG: H.248 terminations representing analogue lines where the Network Termination Point (NTP) at the
customer premises conform to ES 201 970 [3].
• ISDN: H.248 terminations representing ISDN B-Channels of ISDN Primary and Basic Access that conform to
TBR 003 [13] and TBR 004 [14].
• V5: Support of V5.1 and V5.2 is according to EN 300 324-1 [54] and EN 300 347-1 [55].
Support of NMDS is achieved using ISDN terminations, according to EN 301 141-1 [7].
Table 2
Maximum number of contexts:
Provisioned
(see note 1)
Maximum number of terminations per context: 2 (see note 2), 3 (see note 3), (see note 4), more than
3 (see note 4)
(see note 5)
Allowed terminations type combinations in a Media Gatew
...
ETSI Standard
Telecommunications and Internet converged Services and
Protocols for Advanced Networking (TISPAN);
H.248 Profile for controlling
Access and Residential Gateways
2 ETSI ES 283 002 V2.1.0 (2008-03)
Reference
RES/TISPAN-03103-NGN-R2
Keywords
H.248, ISDN, PSTN, signalling
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3 ETSI ES 283 002 V2.1.0 (2008-03)
Contents
Intellectual Property Rights.6
Foreword.6
1 Scope.7
1.1 Differences between H.248 ARGW Profiles Version 1 and Version 2.7
2 References.7
2.1 Normative references.7
2.2 Informative references.10
3 Definitions and abbreviations.10
3.1 Definitions.10
3.2 Abbreviations.11
4 Applicability.12
4.1 Architecture.12
4.2 Functional requirements.13
5 Profile description .13
5.1 Profile identification.13
5.2 Summary.14
5.3 Gateway control protocol version.14
5.4 Connection model.14
5.5 Context attributes.15
5.6 Terminations.15
5.6.1 Termination names.15
5.6.1.1 Physical terminations.15
5.6.1.2 Ephemeral terminations.16
5.6.2 Multiplexed terminations.16
5.7 Descriptors.16
5.7.1 Stream descriptor.16
5.7.1.1 LocalControl Descriptor.16
5.7.2 Events descriptor.18
5.7.3 EventBuffer descriptor.18
5.7.4 Signals descriptor.19
5.7.5 DigitMap descriptor.20
5.7.6 Statistics descriptor.20
5.7.7 ObservedEvents descriptor.20
5.7.8 Topology descriptor.20
5.7.9 Error descriptor.21
5.8 Command API.21
5.8.1 Add.21
5.8.2 Modify.21
5.8.3 Subtract.21
5.8.4 Move.22
5.8.5 AuditValue.22
5.8.6 AuditCapabilities .22
5.8.7 ServiceChange.22
5.8.8 Manipulating and auditing context attributes.23
5.9 Generic command syntax and encoding.23
5.10 Transactions.23
5.11 Messages.24
5.12 Transport.25
5.13 Security.25
5.14 Packages.26
5.14.1 Overview.26
5.14.2 Package usage information .27
5.14.2.1 Generic (g).29
ETSI
4 ETSI ES 283 002 V2.1.0 (2008-03)
5.14.2.2 Base root (root) .30
5.14.2.3 Call progress tones generator (cg).31
5.14.2.4 Media gateway overload control (ocp).32
5.14.2.5 Network (nt).33
5.14.2.6 TDM circuit (tdmc).34
5.14.2.7 RTP (rtp) .35
5.14.2.8 Extended DTMF detection (xdd) .36
5.14.2.9 Basic services tones generator (srvtn).37
5.14.2.10 Expanded call progress tones generator (xcg).38
5.14.2.11 Enhanced alerting (alert) .39
5.14.2.12 Analog display signalling (andisp).40
5.14.2.13 Generic announcement (an) .41
5.14.2.14 Analog line supervision (al) .42
5.14.2.15 Extended analog line supervision (xal) .43
5.14.2.16 Automatic metering (amet).44
5.14.2.17 Intrusion tones generation (int) .45
5.14.2.18 Business tones generation (biztn).46
5.14.2.19 Differentiated Services (ds).47
5.14.2.20 Quality alert ceasing (qac) .47
5.14.2.21 Inactivity timer (it) .48
5.14.2.22 Call type discrimination (ctyp).48
5.14.2.23 Stimulus analog line (stimal).50
5.14.2.24 MGC information (MGCInfo) .52
5.14.2.25 Statistic Conditional Reporting (scr).52
5.14.2.26 ETSI Notification Rate Package (etsi_nr) .53
5.15 Mandatory support of SDP and annex C information elements .53
5.16 Procedures.56
6 Procedures at the IP side .56
6.1 General procedures.56
6.2 VoiceBand Data (VBD) .56
6.3 Support of ISDN unrestricted 64 kbit/s .57
6.4 Comfort noise insertion and silence suppression.57
6.5 DTMF transmission.58
6.6 Call progress tones .58
6.7 Support of G.711 variants .58
6.7.1 G.711 encoding law .58
6.7.2 G.711 silence suppression mode.58
6.7.3 G.711 packet loss concealment.59
6.8 MG-Internal redirection of RTP traffic .59
7 Procedures for Physical H.248 terminations .59
7.1 General procedures.59
7.1.1 Initial configuration.59
7.1.2 DTMF detection.60
7.1.3 Sending of tones .60
7.1.4 Sending of announcements .60
7.1.5 Support of emergency calls.61
7.1.6 Echo control.61
7.2 Specific procedures for analog lines.61
7.2.1 Autonomous actions.62
7.2.2 Alerting.62
7.2.3 Automatic metering.62
7.2.4 Display service.62
7.2.4.1 On hook data transmission .62
7.2.4.2 Off hook data transmission: .63
7.3 Specific procedures for ISDN interfaces .63
7.3.1 General.63
7.3.2 ISDN-BA signalling.63
7.3.2.1 Discrimination of s-type frames (layer 2 call control signalling).64
7.3.2.2 Discrimination of p-type frames .64
7.3.2.3 Discrimination of f-type frames .64
ETSI
5 ETSI ES 283 002 V2.1.0 (2008-03)
7.3.2.4 SCTP Association establishment .64
7.3.2.4.1 IUA/SCTP for Q.931 call control signalling traffic .64
7.3.2.4.2 IUA/SCTP for X.25 or frame relay traffic.64
7.3.3 ISDN-PRA signalling.65
7.3.4 NMDS.65
7.3.5 ISDN management.65
7.4 Specific procedures for V5 interfaces .65
7.4.1 General.65
7.4.2 V5 signalling.65
7.4.3 Handling of p- and f-type frames.65
8 MG and MGC management and call-independent procedures .66
8.1 Overload control.66
8.1.1 Notification Behaviour.66
8.1.2 Adaptive Rate Based.67
8.2 IP QoS control and monitoring.67
8.3 Testing of analog and digital lines.67
8.4 Real Time Statistics Reporting.67
Annex A (informative): Comparison with H.248 ARGW Profile Version 1.68
A.1 General.68
A.2 Differences between H.248 ARGW Profiles Version 1 and Version 2.68
Annex B (informative): Bibliography.69
History .70
ETSI
6 ETSI ES 283 002 V2.1.0 (2008-03)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This ETSI Standard (ES) has been produced by ETSI Technical Committee Telecommunications and Internet
converged Services and Protocols for Advanced Networking (TISPAN).
ETSI
7 ETSI ES 283 002 V2.1.0 (2008-03)
1 Scope
The present document defines a profile of the Gateway Control Protocol (H.248.1), for controlling access and
residential gateways connecting analog lines and ISDN primary and basic accesses, in order to emulate PSTN/ISDN
services over IP.
1.1 Differences between H.248 ARGW Profiles Version 1 and
Version 2
The differences between both H.248 profile versions are detailed in annex A.
Summary list of differences:
1) Package usage details (see clause 5.14.2).
2) IUA/SCTP encapsulation for Q.921 p-/f-type frames in IP domain (see clause 7.3.2).
3) Additional V5 support (see clause 7.4).
4) Adaptive-rate based MGC overload control (see clause 8.1.2).
5) Real time statistics reporting (see clause 8.4).
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the purposes
of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ETSI ES 282 001: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); NGN Functional Architecture Release 1".
ETSI
8 ETSI ES 283 002 V2.1.0 (2008-03)
[2] ETSI ES 282 002: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); PSTN/ISDN Emulation Sub-system (PES); Functional
architecture".
[3] ETSI ES 201 970: "Access and Terminals (AT); Public Switched Telephone Network (PSTN);
Harmonized specification of physical and electrical characteristics at a 2-wire analogue presented
Network Termination Point (NTP)".
[4] ETSI EN 300 659-1: "Access and Terminals (AT); Analogue access to the Public Switched
Telephone Network (PSTN); Subscriber line protocol over the local loop for display (and related)
services; Part 1: On-hook data transmission".
[5] ETSI EN 300 659-2: "Access and Terminals (AT); Analogue access to the Public Switched
Telephone Network (PSTN); Subscriber line protocol over the local loop for display (and related)
services; Part 2: Off-hook data transmission".
[6] ETSI ETS 300 099: "Integrated Services Digital Network (ISDN); Specification of the Packet
Handler access point Interface (PHI)".
[7] ETSI EN 301 141-1: "Integrated Services Digital Network (ISDN); Narrowband Multi-service
Delivery System (NMDS); Part 1: NMDS interface specification".
[8] ETSI ETS 300 402-2: "Integrated Services Digital Network (ISDN); Digital Subscriber Signalling
System No. one (DSS1) protocol; Data link layer; Part 2: General protocol specification [ITU-T
Recommendation Q.921 (1993), modified]".
[9] ETSI EN 300 367: "Integrated Services Digital Network (ISDN); Explicit Call Transfer (ECT)
supplementary service; Service description".
[10] ETSI TS 102 333: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Gate control protocol".
[11] ITU-T Recommendation H.248.45: "Gateway control protocol: MGC information package".
[12] IETF RFC 4233 (2006-01): "Integrated Services Digital Network (ISDN) Q.921-User Adaptation
Layer".
[13] ETSI TBR 003: "Integrated Services Digital Network (ISDN); Attachment requirements for
terminal equipment to connect to an ISDN using ISDN basic access".
[14] ETSI TBR 004: "Integrated Services Digital Network (ISDN); Attachment requirements for
terminal equipment to connect to an ISDN using ISDN primary rate access".
[15] ITU-T Recommendation H.248.1 + Corrigendum 1: "Gateway control protocol: Version 2".
[16] ITU-T Recommendation H.248.2: "Gateway control protocol: Facsimile, text conversation and
call discrimination packages".
[17] ITU-T Recommendation H.248.4 + Corrigendum 1: "Gateway control protocol: Transport over
Stream Control Transmission Protocol (SCTP)".
[18] ITU-T Recommendation H.248.7: "Gateway control protocol: Generic Announcement package".
[19] ITU-T Recommendation H.248.11: "Gateway control protocol: Media gateway overload control
package".
[20] ITU-T Recommendation H.248.13: "Gateway control protocol: Quality Alert Ceasing package".
[21] ITU-T Recommendation H.248.14: "Gateway control protocol: Inactivity timer package".
[22] ITU-T Recommendation H.248.16 + Corrigendum 1: "Gateway control protocol: Enhanced digit
collection packages and procedures".
[23] ITU-T Recommendation H.248.23: "Gateway control protocol: Enhanced Alerting packages".
ETSI
9 ETSI ES 283 002 V2.1.0 (2008-03)
[24] ITU-T Recommendation H.248.26 + Amendment 1: "Gateway control protocol: Enhanced analog
lines packages".
[25] ITU-T Recommendation H.248.34: "Gateway control protocol: Stimulus analogue lines package".
[26] ITU-T Recommendation Q.1950: "Bearer independent call bearer control protocol".
[27] ITU-T Recommendation G.711: "Pulse code modulation (PCM) of voice frequencies".
[28] ITU-T Recommendation G.711 Appendix I: "A high quality low-complexity algorithm for packet
loss concealment with G.711".
[29] ITU-T Recommendation G.711 Appendix II: "A comfort noise payload definition for ITU-T
G.711 use in packet-based multimedia communication systems".
[30] ITU-T Recommendation T.38: "Procedures for real-time Group 3 facsimile communication over
IP networks".
[31] ITU-T Recommendation V.150.1: "Modem-over-IP networks: Procedures for the end-to-end
connection of V-series DCEs".
[32] ITU-T Recommendation V.152: "Procedures for supporting voice-band data over IP networks".
[33] ITU-T Recommendation E.180: "Technical characteristics of tones for the telephone service".
[34] IETF RFC 2327: "SDP: Session Description Protocol".
[35] IETF RFC 3551: "RTP Profile for Audio and Video Conferences with Minimal Control".
[36] IETF RFC 4301: "Security Architecture for the Internet Protocol".
[37] IETF RFC 4733: "RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals".
[38] IETF RFC 2784: "Generic Routing Encapsulation (GRE)".
[39] IETF RFC 4040: "RTP Payload Format for a 64 kbit/s Transparent Call".
[40] IETF RFC 4855: "Media Type Registration of RTP Payload Formats".
[41] ITU-T Recommendation G.168: "Digital network echo cancellers".
[42] IETF RFC 2733: "An RTP Payload Format for Generic Forward Error Correction".
[43] IETF RFC 2198: "RTP Payload for Redundant Audio Data".
[44] ITU-T Recommendation Q.115.0: "Protocols for the control of signal processing network elements
and functions".
[45] ITU-T Recommendation Q.115.1: "Logic for the control of echo control devices and functions".
[46] ITU-T Recommendation Q.921: "ISDN user-network interface - Data link layer specification".
[47] ETSI ETS 300 297: "Integrated Services Digital Network (ISDN); Access digital section for ISDN
basic access".
[48] ETSI ETS 300 233: "Integrated Services Digital Network (ISDN); Access digital section for ISDN
primary rate".
[49] ITU-T Recommendation H.248.17: "Gateway control protocol: Line test packages".
[50] ETSI ES 201 235-3: "Access and Terminals (AT); Specification of Dual-Tone Multi-Frequency
(DTMF) Transmitters and Receivers; Part 3: Receivers".
[51] IETF RFC 3389: "Real-time Transport Protocol (RTP) Payload for Comfort Noise (CN)".
[52] ETSI ES 283 002 (V1.1.1): "Telecommunications and Internet converged Services and Protocols
for Advanced Networking (TISPAN); PSTN/ISDN Emulation Subsystem (PES); NGN Release 1
H.248 Profile for controlling Access and Residential Gateways".
ETSI
10 ETSI ES 283 002 V2.1.0 (2008-03)
[53] IETF RFC 3807 (2004): "V5.2-User Adaptation Layer (V5UA)".
[54] ETSI EN 300 324-1: "V interfaces at the digital Local Exchange (LE); V5.1 interface for the
support of Access Network (AN); Part 1: V5.1 interface specification".
[55] ETSI EN 300 347-1: "V interfaces at the digital Local Exchange (LE); V5.2 interface for the
support of Access Network (AN); Part 1: V5.2 interface specification".
[56] ITU-T Recommendation H.248.47 (2007-01): "Gateway control protocol: Statistic conditional
reporting package".
[57] ETSI ES 283 039-4 (V2.1.1): "Telecommunications and Internet converged Services and Protocols
for Advanced Networking (TISPAN); NGN Overload Control Architecture; Part 4: Adaptative
Control for the MGC".
[58] IETF RFC 2960: "Stream Control Transmission Protocol".
[59] ETSI TS 102 144: "Services and Protocols for Advanced Networks (SPAN); MTP/SCCP/SSCOP
and SIGTRAN (Transport of SS7 over IP); Stream Control Transmission Protocol (SCTP)
[Endorsement of RFC 2960 and RFC 3309, modified]".
2.2 Informative references
[60] ETSI TR 183 025 (V2.0.0): "Telecommunications and Internet converged Services and Protocols
for Advanced Networking (TISPAN); H.248 Non-call related procedures and management system
interaction".
[61] ETSI TR 183 040 (V1.1.1): "Telecommunications and Internet converged Services and Protocols
for Advanced Networking (TISPAN); H.248 POTS Message Flows based on the H.248 Profile for
controlling Access and Residential Gateways".
[62] ITU-T Recommendation H.248.1 (Version 3) Amendment 1: "Gateway control protocol".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document the terms and definitions given in ITU-T Recommendation H.248.1 [15] and
the following apply:
Access GateWay (AGW): Media Gateway that interworks a significant number of analogue lines to a packet network
and is located at the operator's premises. See also clause 3.1of ITU-T Recommendation H.248.1 [15].
IP Port: source and destination port numbers for UDP, SCTP and TCP traffic
Media GateWay (MGW): refers both to Access Media Gateways and to Residential Media Gateways
NOTE: See ITU-T Recommendation H.248.1 [15].
MG Port: single physical access interface at a Media Gateway. This is always a circuit-oriented interface in the scope
of this H.248 Profile
NOTE: There are therefore three port types: analog port, ISDN Basic Rate Access port and Primary Rate Access
Port.
originating Media Gateway: Media Gateway to which the calling party's physical termination is connected
Residential GateWay (RGW): Media Gateway that interworks a small number of analogue lines
NOTE: A residential media gateway typically contains one or two analogue lines and is located at the customer
premises. See also clause 3.6 of ITU-T Recommendation H.248.1 [15].
ETSI
11 ETSI ES 283 002 V2.1.0 (2008-03)
terminating Media Gateway: Media Gateway to which the called party's physical termination is connected
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ACO Address COmplete message
AGCF Access Gateway Control Function
AGW Access GateWay
A-MGF Access-MGF
AN Access Network
BA Basic Access
CDR Call Detail Record
CN Comfort Noise
CRC Cyclic Redundancy Check
DLCI Data Link Connection endpoint Identifier
DNS Domain Name System
DTMF Dual Tone Multi Frequency
ECD Echo Control Device
FEC Forward Error Correction
FECD Full ECD
FH Frame Handler
GRE Generic Routing Encapsulation
HECD Half-way ECD
IECD Incoming ECD
IID IUA Interface Identifier
IP Internet Protocol
IPsec IP security
ISDN Integrated Services Digital Network
ISUP ISDN User Part
IUA ISDN Q.921-User Adaptation
MGW Media GateWay
MGC Media Gateway Controller
MGF Media Gateway Function
MID Message Identifier
NAT Network Address Translation
NMDS Narrowband Multi-service Delivery System
NT1 Network Termination (type 1)
NTN Network Terminating Node
OAM Operation, Administration and Maintenance
OECD Outgoing ECD
PBX Private Branch eXchange
PES PSTN/ISDN Emulation Subsystem
PH Packet Handler
PLC Packet Loss Concealment
PLP Packet Layer Procedures
PRA Primary Rate Access
PT Payload Type
QoS Quality of Service
RFC Request For Comments (IETF)
RGW Residential GateWay
R-MGF Residential-MGF
RTP Real-time Transport Protocol
SAPI Service Access Point Identifier
SCTP Stream Control Transmission Protocol
SDP Session Description Protocol
SPNE Signal Processing Network Equipment
SRV SeRVer
SSRC Synchronization SouRCe
TAS Terminal Alerting Signal
TCP Transmission Control Protocol
ETSI
12 ETSI ES 283 002 V2.1.0 (2008-03)
TE Terminal Equipment
TEI TE Identifier
TLS Transport Layer Security
TTL Time To Live
UDP User Datagram Protocol
VBD VoiceBand Data
VoIP Voice over IP
V5UA V5.2 - User Adaptation Layer
4 Applicability
4.1 Architecture
Figure 1 illustrates the architecture assumed in the present document. The Media Gateway Controller (MGC) resides in
a control subsystem and may be implemented as a stand-alone piece of equipment or as a component of a call server.
Access to the IP network is provided to analog terminals, ISDN terminals, analog and ISDN Private Branch Exchanges
(PBX), V5.1 and V5.2 Access Networks (AN) through residential gateways or access gateways, which support one or
more of the following reference points:
• The Z reference point for analogue terminations.
• The T reference point for Primary Rate Access.
• The S/T reference point for Basic Rate Access.
• The T* reference point for NMDS Access, as defined in EN 301 141-1 [7].
• The V5.1 reference point for V5.1 Access, as defined in EN 300 324-1 [54].
• The V5.2 reference point for V5.2 Access, as defined in EN 300 347-1 [55].
Customer’s Premises Operator’s Premises
Control Subsystem
Scope of this
specification
AGW
IP Transport (Access and Core Network)
RGW
NOTE: V5 interfaces are supported by this profile, but not indicated in this drawing. The V5 access networks
would be located in the operator’s premises, in front of the AGW.
Figure 1: Reference architecture
ETSI
Legacy User Equipment
(terminals, PBXs)
13 ETSI ES 283 002 V2.1.0 (2008-03)
The present document does not make any assumption on the structure of the control subsystem hosting the MGC
functionality. In the context of the TISPAN NGN Architecture (see ES 282 001 [1]), the control subsystem is the
PSTN/ISDN Emulation Subsystem (PES) (see ES 282 002 [2]). Within this subsystem, the AGCF plays the MGC role.
The RGW and the AGW implement the R-MGF and A-MGF functional entities (respectively).
The area shown within the dashed lines, including part of the equipment placed on customer premises as a RGW, is
considered to be under the control of a single operator. The use of IPSec (see RFC 4301 [36] or other security measures
to create such a control area is outside the scope of the present document.
4.2 Functional requirements
Support of the packages identified in the profile definition implies support of the underlying functionalities. This clause
identifies additional functional requirements that media gateways conforming to the present document shall comply
with:
• Media Gateways shall support IPv4 and may support IPv6.
• Media Gateways shall support for ITU-T Recommendation G.711 [27] A-law voice codec and may support
other codecs.
NOTE: Other mandatory codecs may also be required depending on the architecture in which media gateways are
used.
• Media Gateways shall support autonomous transition from Audio Mode to
ITU-T Recommendation G.711 [27]-based VBD Mode (according to ITU-T Recommendation V.152 [32])
upon detection of fax modem, text modem or data modem traffic.
• Media Gateways supporting other codecs than ITU-T Recommendation G.711 [27] shall also support the
procedures defined in RFC 4733 [37] to generate, detect and forward DTMF digits. DTMF shall be identified
by name (see mode "Named Telephone Events" in clause 3/RFC 4733 [37]), as opposed to their waveform
properties.
• All properties of tones requested by the MGC shall be provisioned in the Media Gateway. The MGC is not
required to send the physical characteristics of tones to Media Gateways.
• Where a RGW also provides customer access via a Network Address Translation (NAT) device, the design of
the NAT function shall be such that it does not interfere with, and explicitly takes account of, the operation of
the H.248 gateway function in the RGW.
5 Profile description
5.1 Profile identification
Table 1 provides the name and version of the profile that is sent in the service change command.
Table 1
Profile name: ETSI_ARGW
Version: 2
ETSI
14 ETSI ES 283 002 V2.1.0 (2008-03)
5.2 Summary
The profile defined in the present document enables the control of residential and access media gateways connecting
analog and ISDN lines to an IP transport domain, in order to emulate PSTN/ISDN services.
5.3 Gateway control protocol version
Version 2 shall be the minimum version supported. Support of this version implies conformance to
ITU-T Recommendation H.248.1 Version 2 and Corrigendum 1 [15] to this Recommendation, and implementation of
the corrections available in the latest version of the H.248 Implementors' Guide.
Version 3 may be required if automatic metering requires iteration notification and/or if the "one way external"
topology configuration is supported. Support of this version implies conformance to ITU-T Recommendation H.248.1
Version 3 [62]. However, only "onIteration" in the NotifyComplete flag, "oneWayExternal" in the Topology Descriptor
and "neverNotify" of the NotifyBehaviour parameter are required from this Recommendation.
5.4 Connection model
Media Gateways shall support ephemeral terminations that sink and source RTP traffic. This type of H.248 termination
is denoted RTP in the following clauses.
Media Gateways shall also support at least one of the following types of physical terminations:
• ANALOG: H.248 terminations representing analogue lines where the Network Termination Point (NTP) at the
customer premises conform to ES 201 970 [3].
• ISDN: H.248 terminations representing ISDN B-Channels of ISDN Primary and Basic Access that conform to
TBR 003 [13] and TBR 004 [14].
• V5: Support of V5.1 and V5.2 is according to EN 300 324-1 [54] and EN 300 347-1 [55].
Support of NMDS is achieved using ISDN terminations, according to EN 301 141-1 [7].
Table 2
Maximum number of contexts: Provisioned
(see note 1)
Maximum number of terminations per context: 2 (see note 2), 3 (see note 3), (see note 4), more than
3 (see note 4)
(see note 5)
Allowed terminations type combinations in a Media Gateways shall provide support for creating
context: contexts containing two terminations of the same or
different types, i.e.,
Context[a](ANALOG, ANALOG),
...
SLOVENSKI STANDARD
01-julij-2008
=OLWHWHOHNRPXQLNDFLMVNHLQLQWHUQHWQHVWRULWYHWHUSURWRNROL]DQDSUHGQRRPUHåHQMH
7,63$1 3URILO+]DNUPLOMHQMHGRVWRSRYQLKLQUH]LGHQþQLKSUHKRGRY
Telecommunications and Internet converged Services and Protocols for Advanced
Networking (TISPAN) - H.248 Profile for controlling Access and Residential Gateways
Ta slovenski standard je istoveten z: ES 283 002 Version 2.1.0
ICS:
33.040.01 Telekomunikacijski sistemi Telecommunication systems
na splošno in general
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
ETSI Standard
Telecommunications and Internet converged Services and
Protocols for Advanced Networking (TISPAN);
H.248 Profile for controlling
Access and Residential Gateways
2 ETSI ES 283 002 V2.1.0 (2008-03)
Reference
RES/TISPAN-03103-NGN-R2
Keywords
H.248, ISDN, PSTN, signalling
ETSI
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ETSI
3 ETSI ES 283 002 V2.1.0 (2008-03)
Contents
Intellectual Property Rights.6
Foreword.6
1 Scope.7
1.1 Differences between H.248 ARGW Profiles Version 1 and Version 2.7
2 References.7
2.1 Normative references.7
2.2 Informative references.10
3 Definitions and abbreviations.10
3.1 Definitions.10
3.2 Abbreviations.11
4 Applicability.12
4.1 Architecture.12
4.2 Functional requirements.13
5 Profile description .13
5.1 Profile identification.13
5.2 Summary.14
5.3 Gateway control protocol version.14
5.4 Connection model.14
5.5 Context attributes.15
5.6 Terminations.15
5.6.1 Termination names.15
5.6.1.1 Physical terminations.15
5.6.1.2 Ephemeral terminations.16
5.6.2 Multiplexed terminations.16
5.7 Descriptors.16
5.7.1 Stream descriptor.16
5.7.1.1 LocalControl Descriptor.16
5.7.2 Events descriptor.18
5.7.3 EventBuffer descriptor.18
5.7.4 Signals descriptor.19
5.7.5 DigitMap descriptor.20
5.7.6 Statistics descriptor.20
5.7.7 ObservedEvents descriptor.20
5.7.8 Topology descriptor.20
5.7.9 Error descriptor.21
5.8 Command API.21
5.8.1 Add.21
5.8.2 Modify.21
5.8.3 Subtract.21
5.8.4 Move.22
5.8.5 AuditValue.22
5.8.6 AuditCapabilities .22
5.8.7 ServiceChange.22
5.8.8 Manipulating and auditing context attributes.23
5.9 Generic command syntax and encoding.23
5.10 Transactions.23
5.11 Messages.24
5.12 Transport.25
5.13 Security.25
5.14 Packages.26
5.14.1 Overview.26
5.14.2 Package usage information .27
5.14.2.1 Generic (g).29
ETSI
4 ETSI ES 283 002 V2.1.0 (2008-03)
5.14.2.2 Base root (root) .30
5.14.2.3 Call progress tones generator (cg).31
5.14.2.4 Media gateway overload control (ocp).32
5.14.2.5 Network (nt).33
5.14.2.6 TDM circuit (tdmc).34
5.14.2.7 RTP (rtp) .35
5.14.2.8 Extended DTMF detection (xdd) .36
5.14.2.9 Basic services tones generator (srvtn).37
5.14.2.10 Expanded call progress tones generator (xcg).38
5.14.2.11 Enhanced alerting (alert) .39
5.14.2.12 Analog display signalling (andisp).40
5.14.2.13 Generic announcement (an) .41
5.14.2.14 Analog line supervision (al) .42
5.14.2.15 Extended analog line supervision (xal) .43
5.14.2.16 Automatic metering (amet).44
5.14.2.17 Intrusion tones generation (int) .45
5.14.2.18 Business tones generation (biztn).46
5.14.2.19 Differentiated Services (ds).47
5.14.2.20 Quality alert ceasing (qac) .47
5.14.2.21 Inactivity timer (it) .48
5.14.2.22 Call type discrimination (ctyp).48
5.14.2.23 Stimulus analog line (stimal).50
5.14.2.24 MGC information (MGCInfo) .52
5.14.2.25 Statistic Conditional Reporting (scr).52
5.14.2.26 ETSI Notification Rate Package (etsi_nr) .53
5.15 Mandatory support of SDP and annex C information elements .53
5.16 Procedures.56
6 Procedures at the IP side .56
6.1 General procedures.56
6.2 VoiceBand Data (VBD) .56
6.3 Support of ISDN unrestricted 64 kbit/s .57
6.4 Comfort noise insertion and silence suppression.57
6.5 DTMF transmission.58
6.6 Call progress tones .58
6.7 Support of G.711 variants .58
6.7.1 G.711 encoding law .58
6.7.2 G.711 silence suppression mode.58
6.7.3 G.711 packet loss concealment.59
6.8 MG-Internal redirection of RTP traffic .59
7 Procedures for Physical H.248 terminations .59
7.1 General procedures.59
7.1.1 Initial configuration.59
7.1.2 DTMF detection.60
7.1.3 Sending of tones .60
7.1.4 Sending of announcements .60
7.1.5 Support of emergency calls.61
7.1.6 Echo control.61
7.2 Specific procedures for analog lines.61
7.2.1 Autonomous actions.62
7.2.2 Alerting.62
7.2.3 Automatic metering.62
7.2.4 Display service.62
7.2.4.1 On hook data transmission .62
7.2.4.2 Off hook data transmission: .63
7.3 Specific procedures for ISDN interfaces .63
7.3.1 General.63
7.3.2 ISDN-BA signalling.63
7.3.2.1 Discrimination of s-type frames (layer 2 call control signalling).64
7.3.2.2 Discrimination of p-type frames .64
7.3.2.3 Discrimination of f-type frames .64
ETSI
5 ETSI ES 283 002 V2.1.0 (2008-03)
7.3.2.4 SCTP Association establishment .64
7.3.2.4.1 IUA/SCTP for Q.931 call control signalling traffic .64
7.3.2.4.2 IUA/SCTP for X.25 or frame relay traffic.64
7.3.3 ISDN-PRA signalling.65
7.3.4 NMDS.65
7.3.5 ISDN management.65
7.4 Specific procedures for V5 interfaces .65
7.4.1 General.65
7.4.2 V5 signalling.65
7.4.3 Handling of p- and f-type frames.65
8 MG and MGC management and call-independent procedures .66
8.1 Overload control.66
8.1.1 Notification Behaviour.66
8.1.2 Adaptive Rate Based.67
8.2 IP QoS control and monitoring.67
8.3 Testing of analog and digital lines.67
8.4 Real Time Statistics Reporting.67
Annex A (informative): Comparison with H.248 ARGW Profile Version 1.68
A.1 General.68
A.2 Differences between H.248 ARGW Profiles Version 1 and Version 2.68
Annex B (informative): Bibliography.69
History .70
ETSI
6 ETSI ES 283 002 V2.1.0 (2008-03)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This ETSI Standard (ES) has been produced by ETSI Technical Committee Telecommunications and Internet
converged Services and Protocols for Advanced Networking (TISPAN).
ETSI
7 ETSI ES 283 002 V2.1.0 (2008-03)
1 Scope
The present document defines a profile of the Gateway Control Protocol (H.248.1), for controlling access and
residential gateways connecting analog lines and ISDN primary and basic accesses, in order to emulate PSTN/ISDN
services over IP.
1.1 Differences between H.248 ARGW Profiles Version 1 and
Version 2
The differences between both H.248 profile versions are detailed in annex A.
Summary list of differences:
1) Package usage details (see clause 5.14.2).
2) IUA/SCTP encapsulation for Q.921 p-/f-type frames in IP domain (see clause 7.3.2).
3) Additional V5 support (see clause 7.4).
4) Adaptive-rate based MGC overload control (see clause 8.1.2).
5) Real time statistics reporting (see clause 8.4).
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the purposes
of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ETSI ES 282 001: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); NGN Functional Architecture Release 1".
ETSI
8 ETSI ES 283 002 V2.1.0 (2008-03)
[2] ETSI ES 282 002: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); PSTN/ISDN Emulation Sub-system (PES); Functional
architecture".
[3] ETSI ES 201 970: "Access and Terminals (AT); Public Switched Telephone Network (PSTN);
Harmonized specification of physical and electrical characteristics at a 2-wire analogue presented
Network Termination Point (NTP)".
[4] ETSI EN 300 659-1: "Access and Terminals (AT); Analogue access to the Public Switched
Telephone Network (PSTN); Subscriber line protocol over the local loop for display (and related)
services; Part 1: On-hook data transmission".
[5] ETSI EN 300 659-2: "Access and Terminals (AT); Analogue access to the Public Switched
Telephone Network (PSTN); Subscriber line protocol over the local loop for display (and related)
services; Part 2: Off-hook data transmission".
[6] ETSI ETS 300 099: "Integrated Services Digital Network (ISDN); Specification of the Packet
Handler access point Interface (PHI)".
[7] ETSI EN 301 141-1: "Integrated Services Digital Network (ISDN); Narrowband Multi-service
Delivery System (NMDS); Part 1: NMDS interface specification".
[8] ETSI ETS 300 402-2: "Integrated Services Digital Network (ISDN); Digital Subscriber Signalling
System No. one (DSS1) protocol; Data link layer; Part 2: General protocol specification [ITU-T
Recommendation Q.921 (1993), modified]".
[9] ETSI EN 300 367: "Integrated Services Digital Network (ISDN); Explicit Call Transfer (ECT)
supplementary service; Service description".
[10] ETSI TS 102 333: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Gate control protocol".
[11] ITU-T Recommendation H.248.45: "Gateway control protocol: MGC information package".
[12] IETF RFC 4233 (2006-01): "Integrated Services Digital Network (ISDN) Q.921-User Adaptation
Layer".
[13] ETSI TBR 003: "Integrated Services Digital Network (ISDN); Attachment requirements for
terminal equipment to connect to an ISDN using ISDN basic access".
[14] ETSI TBR 004: "Integrated Services Digital Network (ISDN); Attachment requirements for
terminal equipment to connect to an ISDN using ISDN primary rate access".
[15] ITU-T Recommendation H.248.1 + Corrigendum 1: "Gateway control protocol: Version 2".
[16] ITU-T Recommendation H.248.2: "Gateway control protocol: Facsimile, text conversation and
call discrimination packages".
[17] ITU-T Recommendation H.248.4 + Corrigendum 1: "Gateway control protocol: Transport over
Stream Control Transmission Protocol (SCTP)".
[18] ITU-T Recommendation H.248.7: "Gateway control protocol: Generic Announcement package".
[19] ITU-T Recommendation H.248.11: "Gateway control protocol: Media gateway overload control
package".
[20] ITU-T Recommendation H.248.13: "Gateway control protocol: Quality Alert Ceasing package".
[21] ITU-T Recommendation H.248.14: "Gateway control protocol: Inactivity timer package".
[22] ITU-T Recommendation H.248.16 + Corrigendum 1: "Gateway control protocol: Enhanced digit
collection packages and procedures".
[23] ITU-T Recommendation H.248.23: "Gateway control protocol: Enhanced Alerting packages".
ETSI
9 ETSI ES 283 002 V2.1.0 (2008-03)
[24] ITU-T Recommendation H.248.26 + Amendment 1: "Gateway control protocol: Enhanced analog
lines packages".
[25] ITU-T Recommendation H.248.34: "Gateway control protocol: Stimulus analogue lines package".
[26] ITU-T Recommendation Q.1950: "Bearer independent call bearer control protocol".
[27] ITU-T Recommendation G.711: "Pulse code modulation (PCM) of voice frequencies".
[28] ITU-T Recommendation G.711 Appendix I: "A high quality low-complexity algorithm for packet
loss concealment with G.711".
[29] ITU-T Recommendation G.711 Appendix II: "A comfort noise payload definition for ITU-T
G.711 use in packet-based multimedia communication systems".
[30] ITU-T Recommendation T.38: "Procedures for real-time Group 3 facsimile communication over
IP networks".
[31] ITU-T Recommendation V.150.1: "Modem-over-IP networks: Procedures for the end-to-end
connection of V-series DCEs".
[32] ITU-T Recommendation V.152: "Procedures for supporting voice-band data over IP networks".
[33] ITU-T Recommendation E.180: "Technical characteristics of tones for the telephone service".
[34] IETF RFC 2327: "SDP: Session Description Protocol".
[35] IETF RFC 3551: "RTP Profile for Audio and Video Conferences with Minimal Control".
[36] IETF RFC 4301: "Security Architecture for the Internet Protocol".
[37] IETF RFC 4733: "RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals".
[38] IETF RFC 2784: "Generic Routing Encapsulation (GRE)".
[39] IETF RFC 4040: "RTP Payload Format for a 64 kbit/s Transparent Call".
[40] IETF RFC 4855: "Media Type Registration of RTP Payload Formats".
[41] ITU-T Recommendation G.168: "Digital network echo cancellers".
[42] IETF RFC 2733: "An RTP Payload Format for Generic Forward Error Correction".
[43] IETF RFC 2198: "RTP Payload for Redundant Audio Data".
[44] ITU-T Recommendation Q.115.0: "Protocols for the control of signal processing network elements
and functions".
[45] ITU-T Recommendation Q.115.1: "Logic for the control of echo control devices and functions".
[46] ITU-T Recommendation Q.921: "ISDN user-network interface - Data link layer specification".
[47] ETSI ETS 300 297: "Integrated Services Digital Network (ISDN); Access digital section for ISDN
basic access".
[48] ETSI ETS 300 233: "Integrated Services Digital Network (ISDN); Access digital section for ISDN
primary rate".
[49] ITU-T Recommendation H.248.17: "Gateway control protocol: Line test packages".
[50] ETSI ES 201 235-3: "Access and Terminals (AT); Specification of Dual-Tone Multi-Frequency
(DTMF) Transmitters and Receivers; Part 3: Receivers".
[51] IETF RFC 3389: "Real-time Transport Protocol (RTP) Payload for Comfort Noise (CN)".
[52] ETSI ES 283 002 (V1.1.1): "Telecommunications and Internet converged Services and Protocols
for Advanced Networking (TISPAN); PSTN/ISDN Emulation Subsystem (PES); NGN Release 1
H.248 Profile for controlling Access and Residential Gateways".
ETSI
10 ETSI ES 283 002 V2.1.0 (2008-03)
[53] IETF RFC 3807 (2004): "V5.2-User Adaptation Layer (V5UA)".
[54] ETSI EN 300 324-1: "V interfaces at the digital Local Exchange (LE); V5.1 interface for the
support of Access Network (AN); Part 1: V5.1 interface specification".
[55] ETSI EN 300 347-1: "V interfaces at the digital Local Exchange (LE); V5.2 interface for the
support of Access Network (AN); Part 1: V5.2 interface specification".
[56] ITU-T Recommendation H.248.47 (2007-01): "Gateway control protocol: Statistic conditional
reporting package".
[57] ETSI ES 283 039-4 (V2.1.1): "Telecommunications and Internet converged Services and Protocols
for Advanced Networking (TISPAN); NGN Overload Control Architecture; Part 4: Adaptative
Control for the MGC".
[58] IETF RFC 2960: "Stream Control Transmission Protocol".
[59] ETSI TS 102 144: "Services and Protocols for Advanced Networks (SPAN); MTP/SCCP/SSCOP
and SIGTRAN (Transport of SS7 over IP); Stream Control Transmission Protocol (SCTP)
[Endorsement of RFC 2960 and RFC 3309, modified]".
2.2 Informative references
[60] ETSI TR 183 025 (V2.0.0): "Telecommunications and Internet converged Services and Protocols
for Advanced Networking (TISPAN); H.248 Non-call related procedures and management system
interaction".
[61] ETSI TR 183 040 (V1.1.1): "Telecommunications and Internet converged Services and Protocols
for Advanced Networking (TISPAN); H.248 POTS Message Flows based on the H.248 Profile for
controlling Access and Residential Gateways".
[62] ITU-T Recommendation H.248.1 (Version 3) Amendment 1: "Gateway control protocol".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document the terms and definitions given in ITU-T Recommendation H.248.1 [15] and
the following apply:
Access GateWay (AGW): Media Gateway that interworks a significant number of analogue lines to a packet network
and is located at the operator's premises. See also clause 3.1of ITU-T Recommendation H.248.1 [15].
IP Port: source and destination port numbers for UDP, SCTP and TCP traffic
Media GateWay (MGW): refers both to Access Media Gateways and to Residential Media Gateways
NOTE: See ITU-T Recommendation H.248.1 [15].
MG Port: single physical access interface at a Media Gateway. This is always a circuit-oriented interface in the scope
of this H.248 Profile
NOTE: There are therefore three port types: analog port, ISDN Basic Rate Access port and Primary Rate Access
Port.
originating Media Gateway: Media Gateway to which the calling party's physical termination is connected
Residential GateWay (RGW): Media Gateway that interworks a small number of analogue lines
NOTE: A residential media gateway typically contains one or two analogue lines and is located at the customer
premises. See also clause 3.6 of ITU-T Recommendation H.248.1 [15].
ETSI
11 ETSI ES 283 002 V2.1.0 (2008-03)
terminating Media Gateway: Media Gateway to which the called party's physical termination is connected
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ACO Address COmplete message
AGCF Access Gateway Control Function
AGW Access GateWay
A-MGF Access-MGF
AN Access Network
BA Basic Access
CDR Call Detail Record
CN Comfort Noise
CRC Cyclic Redundancy Check
DLCI Data Link Connection endpoint Identifier
DNS Domain Name System
DTMF Dual Tone Multi Frequency
ECD Echo Control Device
FEC Forward Error Correction
FECD Full ECD
FH Frame Handler
GRE Generic Routing Encapsulation
HECD Half-way ECD
IECD Incoming ECD
IID IUA Interface Identifier
IP Internet Protocol
IPsec IP security
ISDN Integrated Services Digital Network
ISUP ISDN User Part
IUA ISDN Q.921-User Adaptation
MGW Media GateWay
MGC Media Gateway Controller
MGF Media Gateway Function
MID Message Identifier
NAT Network Address Translation
NMDS Narrowband Multi-service Delivery System
NT1 Network Termination (type 1)
NTN Network Terminating Node
OAM Operation, Administration and Maintenance
OECD Outgoing ECD
PBX Private Branch eXchange
PES PSTN/ISDN Emulation Subsystem
PH Packet Handler
PLC Packet Loss Concealment
PLP Packet Layer Procedures
PRA Primary Rate Access
PT Payload Type
QoS Quality of Service
RFC Request For Comments (IETF)
RGW Residential GateWay
R-MGF Residential-MGF
RTP Real-time Transport Protocol
SAPI Service Access Point Identifier
SCTP Stream Control Transmission Protocol
SDP Session Description Protocol
SPNE Signal Processing Network Equipment
SRV SeRVer
SSRC Synchronization SouRCe
TAS Terminal Alerting Signal
TCP Transmission Control Protocol
ETSI
12 ETSI ES 283 002 V2.1.0 (2008-03)
TE Terminal Equipment
TEI TE Identifier
TLS Transport Layer Security
TTL Time To Live
UDP User Datagram Protocol
VBD VoiceBand Data
VoIP Voice over IP
V5UA V5.2 - User Adaptation Layer
4 Applicability
4.1 Architecture
Figure 1 illustrates the architecture assumed in the present document. The Media Gateway Controller (MGC) resides in
a control subsystem and may be implemented as a stand-alone piece of equipment or as a component of a call server.
Access to the IP network is provided to analog terminals, ISDN terminals, analog and ISDN Private Branch Exchanges
(PBX), V5.1 and V5.2 Access Networks (AN) through residential gateways or access gateways, which support one or
more of the following reference points:
• The Z reference point for analogue terminations.
• The T reference point for Primary Rate Access.
• The S/T reference point for Basic Rate Access.
• The T* reference point for NMDS Access, as defined in EN 301 141-1 [7].
• The V5.1 reference point for V5.1 Access, as defined in EN 300 324-1 [54].
• The V5.2 reference point for V5.2 Access, as defined in EN 300 347-1 [55].
Customer’s Premises Operator’s Premises
Control Subsystem
Scope of this
specification
AGW
IP Transport (Access and Core Network)
RGW
NOTE: V5 interfaces are supported by this profile, but not indicated in this drawing. The V5 access networks
would be located in the operator’s premises, in front of the AGW.
Figure 1: Reference architecture
ETSI
Legacy User Equipment
(terminals, PBXs)
13 ETSI ES 283 002 V2.1.0 (2008-03)
The present document does not make any assumption on the structure of the control subsystem hosting the MGC
functionality. In the context of the TISPAN NGN Architecture (see ES 282 001 [1]), the control subsystem is the
PSTN/ISDN Emulation Subsystem (PES) (see ES 282 002 [2]). Within this subsystem, the AGCF plays the MGC role.
The RGW and the AGW implement the R-MGF and A-MGF functional entities (respectively).
The area shown within the dashed lines, including part of the equipment placed on customer premises as a RGW, is
considered to be under the control of a single operator. The use of IPSec (see RFC 4301 [36] or other security measures
to create such a control area is outside the scope of the present document.
4.2 Functional requirements
Support of the packages identified in the profile definition implies support of the underlying functionalities. This clause
identifies additional functional requirements that media gateways conforming to the present document shall comply
with:
• Media Gateways shall support IPv4 and may support IPv6.
• Media Gateways shall support for ITU-T Recommendation G.711 [27] A-law voice codec and may support
other codecs.
NOTE: Other mandatory codecs may also be required depending on the architecture in which media gateways are
used.
• Media Gateways shall support autonomous transition from Audio Mode to
ITU-T Recommendation G.711 [27]-based VBD Mode (according to ITU-T Recommendation V.152 [32])
upon detection of fax modem, text modem or data modem traffic.
• Media Gateways supporting other codecs than ITU-T Recommendation G.711 [27] shall also support the
procedures defined in RFC 4733 [37] to generate, detect and forward DTMF digits. DTMF shall be identified
by name (see mode "Named Telephone Events" in clause 3/RFC 4733 [37]), as opposed to their waveform
properties.
• All properties of tones requested by the MGC shall be provisioned in the Media Gateway. The MGC is not
required to send the physical characteristics of tones to Media Gateways.
• Where a RGW also provides customer access via a Network Address Translation (NAT) device, the design of
the NAT function shall be such that it does not interfere with, and explicitly takes account of, the operation of
the H.248 gateway function in the RGW.
5 Profile description
5.1 Profile identification
Table 1 provides the name and version of the profile that is sent in the service change command.
Table 1
Profile name: ETSI_ARGW
Version: 2
ETSI
14 ETSI ES 283 002 V2.1.0 (2008-03)
5.2 Summary
The profile defined in the present document enables the control of residential and access media gateways connecting
analog and ISDN lines to an IP transport domain, in order to emulate PSTN/ISDN services.
5.3 Gateway control protocol version
Version 2 shall be the minimum version supported. Support of this version implies conformance to
ITU-T Recommendation H.248.1 Version 2 and Corrigendum 1 [15] to this Recommendation, and implementation of
the corrections available in the latest version of the H.248 Implementors' Guide.
Version 3 may be required if automatic metering requires iteration notification and/or if the "one way external"
topology configuration is supported. Support of this version implies conformance to ITU-T Recommen
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