ETSI EN 300 765-1 V1.2.1 (2000-09)

Digital Enhanced Cordless Telecommunications (DECT); Radio in the Local Loop (RLL) Access Profile (RAP); Part 1: Basic telephony services

REN/DECT-CI0170

Digitalne izboljšane brezvrvične telekomunikacije (DECT) – Profil dostopa (RAP) radia v krajevni zanki (RLL) – 1. del: Osnovne telefonske storitve

General Information

• Status: Published
• Publication Date: 06-Sep-2000
• Technical Committee: DECT CI - Common Interface
• Current Stage: 12 - Completion
• Due Date: 30-Jun-2000
• Completion Date: 07-Sep-2000
• Ref Project: SIST EN 300 765-1 V1.2.1:2003 - Digital Enhanced Cordless Telecommunications (DECT); Radio in the Local Loop (RLL) Access Profile (RAP); Part 1: Basic telephony services

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2003
'LJLWDOQHL]EROMãDQHEUH]YUYLþQHWHOHNRPXQLNDFLMH'(&7±3URILOGRVWRSD5$3
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Digital Enhanced Cordless Telecommunications (DECT); Radio in the Local Loop (RLL)
Access Profile (RAP); Part 1: Basic telephony services
Ta slovenski standard je istoveten z: EN 300 765-1 Version 1.2.1
ICS:
33.070.30 'LJLWDOQHL]EROMãDQH Digital Enhanced Cordless
EUH]YUYLþQHWHOHNRPXQLNDFLMH Telecommunications (DECT)
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

ETSI EN 300 765-1 V1.2.1 (2000-08)
European Standard (Telecommunications series)
Digital Enhanced Cordless Telecommunications (DECT);
Radio in the Local Loop (RLL) Access Profile (RAP);
Part 1: Basic telephony services

2 ETSI EN 300 765-1 V1.2.1 (2000-08)
Reference
REN/DECT-CI0170
Keywords
DECT, FWA, RLL, WLL
ETSI
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ETSI
3 ETSI EN 300 765-1 V1.2.1 (2000-08)
Contents
Intellectual Property Rights.6
Foreword.6
1 Scope .7
2 References .7
3 Definitions, symbols and abbreviations .8
3.1 Definitions.8
3.2 Symbols.10
3.3 Abbreviations .11
4 Introduction .12
4.1 Reference model.12
4.2 Services & facilities.12
5 Feature definitions.12
5.1 Network (NWK) features (only differences from GAP) .12
5.2 Application features (only differences from GAP) .13
6 Service definitions.14
6.1 Data Link Control (DLC) service definitions.14
6.1.1 Reference to GAP .14
6.1.2 LU 7 service.14
6.2 Medium Access Control (MAC) service definitions .14
6.2.1 Reference to GAP .14
6.2.2 MAC service definitions (additional to GAP) .14
7 Interoperability requirements .15
7.1 General .15
7.2 NWK features.16
7.3 DLC services .17
7.4 MAC services.17
7.5 Physical Layer (PHL) services .18
7.6 Application features .18
7.7 NWK feature to procedure mapping .19
7.8 DLC service to procedure mapping.22
7.9 MAC service to procedure mapping.23
7.10 Application feature to procedure mapping .24
7.11 General requirements .24
8 Procedure description.24
9 NWK layer procedures.24
9.1 Reference to GAP.24
9.1.1 Release procedure for "On-hook (conditional release)" .24
9.1.2 CLIP, inband.26
9.1.3 On-hook/off-hook explicit acknowledgement .27
9.2 Maintenance calls.28
9.2.1 Incoming maintenance call .28
9.2.2 Outgoing maintenance call .28
9.2.3 Outgoing call during maintenance call .28
9.2.4 Incoming call during maintenance call .28
9.3 Sending OA&M information.28
9.3.1 Physical resources fault .29
9.3.2 Remote test .29
9.3.3 Alarms .30
9.3.4 On-air modification of user parameters .30
9.3.4.1 Modification of existing users parameters .30
9.3.4.2 Additional subscriptions to the same fixed part .31
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4 ETSI EN 300 765-1 V1.2.1 (2000-08)
9.3.4.3 Derivation of AC for additional subscriptions .31
9.3.5 Start quality measurement .32
9.3.6 Stop quality measurement.32
9.3.7 Remote configuration .32
9.3.8 Claim Actions .33
9.3.8.1 Claim Actions FT side Initiated .34
9.3.8.2 Claim Actions CTA Initiated .35
9.3.9 Remote resynchronization .35
9.3.10 Advanced file transfer.36
9.4 RLL-CC.36
9.4.1 Metering pulses.36
9.4.2 Switch from voice to data service FT initiated .37
9.4.3 Switch from voice to data service CTA initiated .37
9.4.4 Coin collection.38
9.4.5 Ground start .38
9.4.6 Line polarity reversal .38
9.4.7 Switch from 32 kbit/s to 64 kbit/s bearer service (FT initiated) .38
9.4.8 Switching from 32 kbit/s to 64 kbit/s bearer service CTA initiated.40
9.4.9 Line parked .42
9.4.10 Switching from 64 kbit/s to 32 kbit/s bearer service FT initiated.43
9.4.11 Switching from 64 kbit/s to 32 kbit/s bearer service CTA initiated.44
9.5 Analogue leased line establishment.46
10 DLC layer procedures .47
10.1 General .47
10.2 Reference to GAP.47
10.3 LU7 64 kbit/s data bearer service.47
11 MAC layer procedures .47
11.1 Reference to GAP.47
11.2 Advance timing .47
11.3 LU7 64 kbit/s data bearer service.48
11.4 Downlink broadcast, Extended Fixed Part Capabilities .48
11.5 Blind slot information .48
11.6 Improved channel selection rules .49
12 Physical layer requirements.49
12.1 General .49
12.2 Reference to GAP.49
12.3 LU7 64 kbit/s data bearer service.49
13 Requirements regarding the speech transmission.49
13.1 General .49
13.2 Echo control requirements for CTAs intended for 2-wire connections.49
13.3 Disabling the echo control functions.50
13.3.1 General.50
13.3.2 Modem services .50
14 Requirements regarding fax and data transmission.50
14.1 General .50
14.2 Requirements.50
14.2.1 Implementation of the LU7 PCM services. .50
15 Management procedures.51
16 Interworking with WRS applications.51
16.1 General .51
16.2 Requirements.51
16.3 WRS maintenance calls.51
16.3.1 Incoming WRS maintenance call.51
16.3.2 Outgoing WRS maintenance call.51
16.3.3 Maintenance during WRS MM operation.51
17 Application procedures.52
17.1 General .52
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5 ETSI EN 300 765-1 V1.2.1 (2000-08)
17.2 Reference to GAP.52
17.3 Manual entry of the PARK and AC to CTA's .52
17.3.1 Entering the PARK .52
17.3.2 Entering the AC .53
Annex A (informative): PP locking procedure for on air subscription .54
Annex B (informative): Tones, progress indicator and U-plane connection.55
Annex C (informative): EN 300 175 additions/modifications.56
C.1 NWK layer additions/modifications (part 5).56
C.2 MAC layer additions/modifications (part 3) .57
Annex D (normative): Codings for "OA&M" and "RAP-CC" messages .59
D.1 General Structure for RAP <> Information Element .59
D.2 RAP IWU-TO-IWU Contents Proprietary .60
D.2.1 RAP-OA&M Service type coding.60
D.3 RAP IWU-TO-IWU Contents Standardized .61
D.3.1 RAP-CC Service type coding.61
D.3.2 RAP-OA&M Service type coding.62
Annex E (normative): Description of remote tests and quality measurement .65
Annex F (informative): LU8 service.66
F.1 Physical layer service .66
F.2 MAC layer service.66
F.3 DLC layer service.66
Annex G (normative): Synchronization Requirements for Fixed Parts.67
Annex H (normative): Management of the overlapping between decadic dialling and
register recall recognition times .68
Annex I (informative): Installation.69
I.1 Above roof-top DECT WLL systems and GSM 1800 macro cell systems.69
History .70
ETSI
6 ETSI EN 300 765-1 V1.2.1 (2000-08)
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://www.etsi.org/ipr).
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 European Standard (Telecommunications series) has been produced by ETSI Project Digital Enhanced Cordless
Telecommunications (DECT).
The present document is part 1 of a multi-part Telecommunications series covering the Radio in the Local Loop (RLL)
Access Profile (RAP), as identified below:
Part 1: "Basic telephony services";
Part 2: "Advanced telephony services".
Every EN prepared by ETSI is a voluntary standard. The present document may contain text concerning conformance
testing of the equipment to which it relates. This text should be considered as guidance only and does not make the
present document mandatory.
The present document is based on EN 300 175, parts 1 [1] to 8 [8] and EN 300 444 [10]. The present document has
been developed in accordance to the rules of documenting a profile specification as described in ISO/IEC 9646-6 [12].
National transposition dates
Date of adoption of this EN: 23 June 2000
Date of latest announcement of this EN (doa): 30 September 2000
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 March 2001
Date of withdrawal of any conflicting National Standard (dow): 31 March 2001
ETSI
7 ETSI EN 300 765-1 V1.2.1 (2000-08)
1 Scope
The present document specifies that set of technical requirements for Digital Enhanced Cordless Telecommunications
(DECT) Fixed Part (FP) and DECT Cordless Terminal Adapter (CTA) necessary for the support of the Radio in the
Local Loop (RLL) Access Profile (RAP).
The objective of the present document is to ensure the air interface interoperability of DECT RAP CTAs and DECT
RAP FPs and Wireless Relay Stations (WRS) if applied.
In addition, the present document defines the features, services, procedures etc. for the CTA and the FT, which are
provision mandatory either in the CTA or in the FT, as well as some elements that are provision optional but still
process mandatory.
Another objective is to use as much as possible from the existing GAP profile, but to exclude the not applicable GAP-
features. Therefore most of the RAP features refer to GAP [10] features and the necessary additional features (for
example Operation, Administration, and Maintenance (OA&M)) are listed and explained in the present document.
The present document (i.e. part 1), contains the so called "Plain Old Telephone Service (POTS)" services including
leased lines and 64 kbit/s bearer service.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication, edition number, version number, etc.) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies.
• A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the same
number.
[1] ETSI EN 300 175-1: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 1: Overview".
[2] ETSI EN 300 175-2: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 2: Physical Layer (PHL)".
[3] ETSI EN 300 175-3: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 3: Medium Access Control (MAC) Layer".
[4] ETSI EN 300 175-4: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 4: Data Link Control (DLC) Layer".
[5] ETSI EN 300 175-5: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 5: Network (NWK) Layer".
[6] ETSI EN 300 175-6: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 6: Identities and Addressing".
[7] ETSI EN 300 175-7: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 7: Security Features".
[8] ETSI EN 300 175-8: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 8: Speech Coding and Transmission".
[9] ETSI EN 300 176: "Digital Enhanced Cordless Telecommunications (DECT); Approval Test
Specification".
ETSI
8 ETSI EN 300 765-1 V1.2.1 (2000-08)
[10] ETSI EN 300 444: "Digital Enhanced Cordless Telecommunications (DECT); Generic Access
Profile (GAP)".
[11] ETSI EN 300 700: "Digital Enhanced Cordless Telecommunications (DECT); Wireless Relay
Station (WRS)".
[12] ISO/IEC 9646-6: "Information Technology - Open system Interconnection - Conformance testing
methodology and framework: Protocol profile test specification".
[13] ISO/IEC 9646-7: "Information Technology - Open system Interconnection - Conformance testing
methodology and framework: Implementation Conformance Statements".
[14] ETSI TBR 6: "Digital Enhanced Cordless Telecommunications (DECT); General terminal
attachment requirements".
[15] ETSI TBR 10: "Digital Enhanced Cordless Telecommunications (DECT); General terminal
attachment requirements; Telephony applications".
[16] ETSI ETR 246: "Digital Enhanced Cordless Telecommunications (DECT); Application of DECT
Wireless Relay Stations (WRS)".
[17] ETSI ETR 308: "Digital Enhanced Cordless Telecommunications (DECT); Services, facilities and
configurations for DECT in the local loop".
[18] ITU-T Recommendation V.25: "Automatic answering equipment and general procedures for
automatic calling equipment on the general switched telephone network including procedures for
disabling of echo control devices for both manually and automatically established calls".
[19] ITU-T Recommendation G.164: "Echo suppressors".
[20] ITU-T Recommendation G.165: "Echo cancellers".
[21] CEPT Recommendation T/R 22-02: "Frequency band to be designated for the European Digital
Cordless Telecommunication system (DECT)".
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the following definitions apply:
Authentication: the process whereby a DECT subscriber is positively verified to be a legitimate user of a particular FP
NOTE 1: Authentication is generally performed at call set-up, but may also be done at any other time (e.g. during a
call).
Bearer service: type of telecommunication service that provides a defined capability for the transmission of signals
between user-network interfaces
NOTE 2: The DECT user-network interface corresponds to the top of the network layer (layer 3).
C-plane: the control plane of the DECT protocol stacks, which contains all of the internal DECT protocol control, but
may also include some external user information
NOTE 3: The C-plane stack always contains protocol entities up to and including the network layer.
Call: all of the NWK layer processes involved in one network layer peer-to-peer association
NOTE 4: Call may sometimes be used to refer to processes of all layers, since lower layer processes are implicitly
required.
Cordless Terminal Adapter (CTA): physical grouping that contains a DECT portable termination and a line interface
ETSI
9 ETSI EN 300 765-1 V1.2.1 (2000-08)
DECT network: network that uses the DECT air interface to interconnect a local network to one or more portable
applications. The logical boundaries of the DECT network are defined to be at the top of the DECT network layer
NOTE 5: A DECT network is a logical grouping that contains one or more fixed radio terminations plus their
associated portable radio termination. The boundaries of the DECT network are not physical boundaries.
Fixed Part (DECT Fixed Part) (FP): physical grouping that contains all of the elements in the DECT network
between the local network and the DECT air interface
NOTE 6: A DECT FP contains the logical elements of at least one FT, plus additional implementation specific
elements.
Fixed Radio Termination (FT): logical group of functions that contains all of the DECT processes and procedures on
the fixed side of the DECT air interface
NOTE 7: A FT only includes elements that are defined in the DECT CI standard. This includes radio transmission
elements together with a selection of layer 2 and layer 3 elements.
NOTE 8: A FT can also be the FT side of a WRS.
Handover: the process of switching a call in progress from one physical channel to another physical channel
NOTE 9: There are two physical forms of handover, intra-cell handover and inter-cell handover.
Incoming call: call received at a CTA
Inter-cell handover: the switching of a call in progress from one cell to another cell
Internal handover: handover processes that are completely internal to one FT. Internal handover reconnects the call at
the lower layers, while maintaining the call at the NWK layer.
NOTE 10:The lower layer reconnection can either be at the DLC layer (connection handover) or at the MAC layer
(bearer handover).
Interoperability: the capability of FPs and CTAs, that enable a CTA to obtain access to teleservices in more than one
location area and/or from more than one operator (more than one service provider)
Intra-cell handover: the switching of a call in progress from one physical channel of one cell to another physical
channel of the same cell
Local Exchange: local switch connecting the end-user to the public network
Local Network (LNW): telecommunication network capable of offering local telecommunication services
NOTE 11:The term does not include legal or regulatory aspects, nor does it indicate if the network is a public
network or a private network.
location area: the domain in which a PP may receive (and/or make) calls as a result of a single location registration
location registration: the process whereby the position of a DECT PT is determined to the level of one location area,
and this position is updated in one or more databases
NOTE 12:These databases are not included within a DECT FT.
MAC Connection (CONNECTION): an association between one source MAC Multi-Bearer Control (MBC) entity
and one destination MAC MBC entity. This provides a set of related MAC services (a set of logical channels), and it
can involve one or more underlying MAC bearers
Outgoing call: call originating from a PP
Portable Application (PA): logical grouping that contains all the elements that lie beyond the DECT network
boundary on the portable side
NOTE 13:The functions contained in the PA may be physically distributed, but any such distribution is invisible to
the DECT network.
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10 ETSI EN 300 765-1 V1.2.1 (2000-08)
Portable Part (DECT Portable Part) (PP): physical grouping that contains all elements between the user and the
DECT air interface. PP is a generic term that may describe one or several physical pieces
NOTE 14:A DECT PP is logically divided into one PT plus one or more PAs.
Portable Radio Termination (PT): logical group of functions that contains all of the DECT processes and procedures
on the portable side of the DECT air interface
NOTE 15:A PT only includes elements that are defined in the DECT CI standard. This includes radio transmission
elements (layer 1) together with a selection of layer 2 and layer 3 elements.
NOTE 16:A PT can also be the PT side of a WRS or the PT side of a CTA.
Radio Fixed Part (RFP): one physical sub-group of a FP that contains all the radio end points (one or more) that are
connected to a single system of antennas
Registration: an ambiguous term, that should always be qualified. See either location registration or subscription
registration
Subscription registration: the infrequent process whereby a subscriber obtains access rights to one or more FPs
NOTE 17:Subscription registration is usually required before a user can make or receive calls.
Wireless Relay Station (WRS): physical grouping that combines elements of both PTs and FTs to relay information on
a physical channel from one DECT termination to a physical channel to another DECT termination
NOTE 18:The DECT termination can be a PT or an FT or another WRS.
3.2 Symbols
For the purposes of the present document, the following symbols apply if not explicitly otherwise stated:
M for mandatory to support (provision mandatory, process mandatory);
O for optional to support (provision optional, process mandatory);
I for out-of-scope (provision optional, process optional) not subject for testing;
C for conditional to support (process mandatory);
N/A for not-applicable (in the given context the specification makes it impossible to use this capability.
Provision mandatory, process mandatory means that the indicated feature, service or procedure shall be implemented as
described in the present document, and may be subject to testing.
Provision optional, process mandatory means that the indicated feature, service or procedure may be implemented, and
if implemented, the feature, service or procedure shall be implemented as described in the present document, and may
be subject to testing.
NOTE: The used notation is based on the notation proposed in ISO/IEC 9646-7 [13].
ETSI
11 ETSI EN 300 765-1 V1.2.1 (2000-08)
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AC Authentication Code
ARI Access Rights Identity
CC Call Control
CI Common Interface
CLIP Calling Line ID Presentation
CPE Customer Premises Equipment
CTA Cordless Terminal Adapter
DCK Derived Cipher Key
DECT Digital Enhanced Cordless Telecommunications
DLC Data Link Control, Layer 2b of the DECT protocol stack
DTMF Dual Tone Multi-Frequency
FP Fixed Part, (see definitions)
FT Fixed radio Termination
GPS Global Position System
GSM Global System for Mobile communications
IE Information Element
IEC International Electrotechnical Commission
IPUI International Portable User Identity
ISDN Integrated Services Digital Network
ISO International Organisation for Standardization
LLME Lower Layer Management Entity
LNW Local Network
MAC Medium Access Control, Layer 2a of the DECT protocol stack
MM Mobility Management, a NWK layer functional grouping
NWK Network, Layer 3 of the DECT protocol stack
OA&M Operation, Administration, and Maintenance
P Public (environment)
PARK Portable Access Rights Key
PHL PHysical Layer
PLI Park Length Indicator
POT Plain Old Telephone
POTS Plain Old Telephone Service
PP Portable Part
PT Portable radio Termination. See definition
RFP Radio Fixed Part (see definitions)
RFPI Radio Fixed Part Identity
RS Reed Solomon code
SARI Secondary Access Rights Identity
TE Terminal Equipment
TI Transaction Identifier
UAK User Authentication Key
WRS Wireless Relay Station
ETSI
12 ETSI EN 300 765-1 V1.2.1 (2000-08)
4 Introduction
4.1 Reference model
Cordless
Terminal
Adapter
Fixed
RAP
CTA
Part
FP
Portable
Part
Public GAP
PP
ETS 300 700
Cordless
Terminal
Adapter
Wireless
RAP
CTA
Relay
Station
Portable WRS
Part
Public GAP
PP
Figure 1: Reference model
4.2 Services & facilities
The present document provides a minimum service level, i.e. the so-called "POTS" services, and optional extensions
including 64 kbit/s bearer service and leased lines. A Fixed Part that supports RAP may additionally support GAP and
can in this way support both CTAs and GAP PPs as well as the respective RAP and GAP WRSs, and also CTAs with
embedded GAP WRS functionality (see EN 300 700 [11]).
Another part of the RAP is expected to describe ISDN services, non-voiceband data services and support of digital
leased lines.
5 Feature definitions
For the purposes of the present document the feature definitions in the following subclauses apply.
The number given in square brackets after the name of a feature is the item number used in the tables of the present
document.
5.1 Network (NWK) features (only differences from GAP)
On-Hook (CONDITIONAL Release) [N.100]: The ability of the CTA to indicate the action of going on-hook (e.g. to
terminate a call) to the DECT FP. On reception of the "on hook" indication, the DECT FP may terminate the call, and
release the radio resource.
ETSI
13 ETSI EN 300 765-1 V1.2.1 (2000-08)
Calling Line Identity Presentation, inband (CLIP, inband) [N.101]: The ability to provide the calling party number
to the POTS CTA by transmitting DTMF or modem tones to the CTA within the speech channel before off hook during
incoming call.
Incoming maintenance transaction [N.102]: The ability of the CTA to receive, and the FP to send OA&M messages.
Outgoing maintenance transaction [N.103]: The ability of the CTA to send, and the FP to receive OA&M messages.
Maintenance during call [N.104]: The ability of the CTA and FT to exchange OA&M messages during an active call.
Metering pulses [N.105]: The ability of the CTA to generate metering pulses on reception of a corresponding RAP-CC
message.
Analogue Leased Line [N.106]: The ability to provide an analogue leased line.
Physical resources fault [N.107]: The ability of the CTA to corresponding OA&M messages to indicate the location of
faults in the Physical resources to the network management
Remote Test [N.108]: The ability of the FP to request the CTA to run specific tests.
Alarms [N.109]: The ability of the CTA to indicate to the FP that a significant system event occurs or is about to occur
which may seriously affect the systems ability to function.
On-air modification of user parameters[N.110]: The ability of the CTA to accept FP initiated changes of subscription
data.
Switch from voice to data service FT initiated [N.111]: The ability of the FT of detecting the 2.1 kHz tone in the
Audio-Channel and of switching an existing speech call in a data call sending a RAP-CC message to the CTA and the
ability of the CTA to process this message.
Switch from voice to data service CTA initiated [N.112]: The ability of the CTA of detecting the 2.1 kHz tone in the
Audio-Channel and of switching an existing speech call in a data call sending a RAP-CC message to the FT and the
ability of the FT to process this message.
Coin collection [N.113]: The ability to transmit the result of coin collection via RAP-CC message.
Ground start [N.114]: The ability to transmit the ground start signal via a RAP-CC message.
Remote configuration [N.115]: The ability to configure the parameters of the CTA via OA&M messages.
64 kbit/s bearer service using DLC LU7 service [N.116]: The ability to offer the DLC LU7 service suitable for a 64
kbit/s bearer service and transparent ISDN services using double slots at the physical layer.
Line parked [N.117]: The ability of the FP to indicate to the CTA that the Local Exchange has parked the line.
Line polarity reversal [N.118]: The ability to transmit the line polarity reversal signal via a RAP-CC message.
Incoming WRS maintenance transaction [N.119]: The ability of the WRS to receive OA&M messages from the FP.
Outgoing WRS maintenance transaction [N.120]:Theabilityofthe WRStosendOA&M messagestothe FP.
Advanced file transfer [N.121]: The ability to transfer file to the CTA.
Maintenance during WRS MM operation [N.122]: The ability of the WRS to exchange OA&M messages with the
FP during an ongoing MM operation.
5.2 Application features (only differences from GAP)
Manual entry of the PARK and AC to a CTA [A.100]: The ability of the CTA to accept a manual entry of the PARK for
ensuring attachment to the right FP in a physical area covered by many providers and a manual entry of the AC via the
keypad of a connected CPE.
ETSI
14 ETSI EN 300 765-1 V1.2.1 (2000-08)
6 Service definitions
For the purposes of the present document the following service definitions apply.
6.1 Data Link Control (DLC) service definitions
6.1.1 Reference to GAP
See EN 300 444 [10] Generic Access Profile, subclause 5.1.
6.1.2 LU 7 service
The LU-7 service is used to protect the transmission signal by an RS (255,249) code which may be used to correct up to
3 errors within a double slot connection. The generator polynom to encode and decode the information has 6th degree.
The same type as proposed in CCIR Rec. 723 shall be used:
i
pX()=+(X α)
∏
i = 0
where α is a root of the binary primitive polynomial
84 3 2
g()X=+XX+XX+ +1
Adata byte
...