SIST ETS 300 257 E1:2005
(Main)Private Telecommunication Network (PTN); Inter-exchange signalling protocol; Diversion supplementary services
Private Telecommunication Network (PTN); Inter-exchange signalling protocol; Diversion supplementary services
Stage 3 of call forwarding uncond/no-reply/busy sup services at Q ref pt. See DTR/ECMA-0002 (ECMA-TR/SVC) for service description. See ENV41005 for definition of stage 3. See ENV41004 for definition of Q reference point. To contain PICS proforma.
Zasebno telekomunikacijsko omrežje (PTN) – Zasebno omrežje z integriranimi storitvami (PISN) - Medcentralni signalizacijski protokol - Dopolnilna storitev: izsmeritev klica
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST ETS 300 257 E1:2005
01-maj-2005
Zasebno telekomunikacijsko omrežje (PTN) – Zasebno omrežje z integriranimi
storitvami (PISN) - Medcentralni signalizacijski protokol - Dopolnilna storitev:
izsmeritev klica
Private Telecommunication Network (PTN); Inter-exchange signalling protocol; Diversion
supplementary services
Ta slovenski standard je istoveten z: ETS 300 257 Edition 1
ICS:
33.040.35 Telefonska omrežja Telephone networks
SIST ETS 300 257 E1:2005 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN ETS 300 257
TELECOMMUNICATION November 1993
STANDARD
Source: ETSI TC-ECMA Reference: DE/ECMA-00048
ICS: 33.080
PTN, ECMA-174, QSIG-CF
Key words:
Private Telecommunication Network (PTN);
Inter-exchange signalling protocol
Diversion supplementary services
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
F-06921 Sophia Antipolis CEDEX - FRANCE
Postal address:
650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Office address:
c=fr, a=atlas, p=etsi, s=secretariat - secretariat@etsi.fr
X.400: Internet:
Tel.: +33 92 94 42 00 - Fax: +33 93 65 47 16
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1993. All rights reserved.
New presentation - see History box
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Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.
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Contents
Foreword .7
1 Scope .9
2 Conformance.9
3 References.9
4 Definitions.10
4.1 External definitions.10
4.2 Activating PTNX.10
4.3 Busy .10
4.4 Connected number .11
4.5 Deactivating PTNX.11
4.6 Diversion.11
4.7 Diverted-to number .11
4.8 Diverted-to PTNX.11
4.9 Diverted-to user .11
4.10 Diverting cause .11
4.11 Diverting number.11
4.12 Forwarding.11
4.13 Forward switching.11
4.14 Interrogating PTNX .11
4.15 Last diverting user.11
4.16 Original called number.12
4.17 Original called user .12
4.18 Partial re-routing .12
4.19 Presentation indicator .12
4.20 Re-routing .12
4.21 Re-routing PTNX .12
4.22 Served user.12
4.23 User A.12
4.24 User B.12
4.25 User B1, user B2, user B3, etc. .12
4.26 User C.13
5 List of acronyms .13
6 Signalling protocol for the support of SS-CF.13
6.1 SS-CF description.13
6.2 SS-CF operational requirements .13
6.2.1 Provision/withdrawal.13
6.2.2 Requirements on the Originating PTNX.14
6.2.3 Requirements on the Served User PTNX .14
6.2.4 Requirements on the Diverted-to PTNX.14
6.2.5 Requirements on the Re-routing PTNX .15
6.2.6 Requirements on a Transit PTNX .15
6.2.7 Requirements on the Activating PTNX.15
6.2.8 Requirements on the Deactivating PTNX .15
6.2.9 Requirements on the Interrogating PTNX .15
6.3 SS-CF coding requirements .15
6.3.1 Operations.15
6.3.2 Information elements.21
6.3.2.1 Facility information element.21
6.3.2.2 Notification indicator information element.21
6.3.3 Messages.21
6.4 SS-CF state definitions .21
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6.4.1 States at the Originating PTNX. 21
6.4.2 States at the Served User PTNX. 22
6.4.3 States at the Diverted-to PTNX . 22
6.4.4 States at the Re-routing PTNX . 22
6.4.5 States at the Activating PTNX . 23
6.4.6 States at the Deactivating PTNX . 23
6.4.7 States at the Interrogating PTNX. 23
6.5 SS-CF signalling procedures. 23
6.5.1 Actions at the Originating PTNX. 23
6.5.1.1 Normal procedure . 23
6.5.1.2 Exceptional procedures . 24
6.5.2 Actions at a Transit PTNX . 24
6.5.3 Actions at the Served User PTNX . 25
6.5.3.1 Normal procedure . 25
6.5.3.1.1 Activation. 25
6.5.3.1.2 Deactivation. 25
6.5.3.1.3 Interrogation . 25
6.5.3.1.4 Verification of the diverted-to user's
number . 26
6.5.3.1.5 Invocation. 26
6.5.3.2 Exceptional procedures . 27
6.5.3.2.1 Activation. 27
6.5.3.2.2 Deactivation. 27
6.5.3.2.3 Interrogation . 27
6.5.3.2.4 Verification of the diverted-to user's
number . 27
6.5.3.2.5 Invocation. 28
6.5.4 Actions at the Re-routing PTNX. 28
6.5.4.1 Normal procedure . 28
6.5.4.2 Exceptional procedures . 30
6.5.5 Actions at the Diverted-to PTNX. 31
6.5.5.1 Normal procedure . 31
6.5.5.1.1 Invocation. 31
6.5.5.1.2 Verification of the diverted-to user's
number . 31
6.5.5.2 Exceptional procedures . 31
6.5.5.2.1 Invocation. 31
6.5.5.2.2 Verification of the diverted-to user's
number . 31
6.5.6 Actions at the Activating PTNX. 31
6.5.6.1 Normal procedure . 31
6.5.6.2 Exceptional procedures . 32
6.5.7 Actions at the Deactivating PTNX. 32
6.5.7.1 Normal procedure . 32
6.5.7.2 Exceptional procedures . 32
6.5.8 Actions at the Interrogating PTNX . 33
6.5.8.1 Normal procedure . 33
6.5.8.2 Exceptional procedures . 33
6.6 SS-CF impact of interworking with public ISDNs . 33
6.6.1 Impact of interworking on incoming calls. 33
6.6.1.1 Diversion within the PTN. 33
6.6.1.2 Diversion within the public ISDN . 34
6.6.1.3 Partial re-routing. 34
6.6.2 Impact of interworking on outgoing calls . 34
6.6.2.1 Diversion within the PTN. 34
6.6.2.2 Diversion within the public ISDN . 35
6.7 SS-CF impact of interworking with non-ISDNs . 35
6.7.1 Impact of interworking on incoming calls. 35
6.7.2 Impact of interworking on outgoing calls . 35
6.8 SS-CF parameter values (Timers) . 35
6.8.1 Timer T1 . 35
6.8.2 Timer T2 . 35
6.8.3 Timer T3 . 35
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6.8.4 Timer T4.36
6.8.5 Timer T5.36
Annex A (normative): Protocol Implementation Conformance Statement (PICS) proforma.37
A.1 Introduction.37
A.2 Instructions for completing the PICS proforma .37
A.2.1 General structure of the PICS proforma .37
A.2.2 Additional information .38
A.2.3 Exception information .38
A.3 PICS proforma for ETS 300 257 .39
A.3.1 Implementation identification .39
A.3.2 Protocol summary.40
A.3.3 General .40
A.3.4 Procedures.41
A.3.5 Coding.42
A.3.6 Timers.44
Annex B (informative) : Examples of message sequences .45
B.1 Message sequences for SS-CFU/SS-CFB invocation .45
B.2 Message sequences for SS-CFNR invocation.47
B.3 Message sequences for activation, deactivation and interrogation.50
Annex C (informative): Specification and Description Language (SDL) representation of procedures.52
C.1 SDL representation of SS-CF at the Originating PTNX .52
C.2 SDL representation of SS-CF at the Re-routing PTNX.53
C.3 SDL representation of SS-CF at the Served User PTNX.55
C.4 SDL representation of SS-CF at the Diverted-to PTNX .58
C.5 SDL representation of SS-CF at the Activating PTNX .59
C.6 SDL representation of SS-CF at the Deactivating PTNX .60
C.7 SDL representation of SS-CF at the Interrogating PTNX.61
Annex D (informative) : Imported ASN.1 definitions.62
History.66
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Foreword
This European Telecommunication Standard (ETS) has been produced by the European Computer
Manufacturers Association (ECMA) on behalf of its members and those of the European
Telecommunications Standards Institute (ETSI).
This ETS is one of a series of standards defining services and signalling protocols applicable to Private
Telecommunication Networks (PTNs). The series uses the ISDN concepts as developed by CCITT and is
also within the framework of standards for open systems interconnection as defined by ISO.
This ETS specifies the signalling protocol for use at the Q reference point in support of the Call
Forwarding Unconditional, Call Forwarding Busy, and Call Forwarding No Reply supplementary services.
The ETS is based upon the practical experience of ECMA member companies and the results of their
active and continuous participation in the work of ISO, CCITT, ETSI and other international and national
standardisation bodies. It represents a pragmatic and widely based consensus.
This ETS was produced by ECMA using the ECMA guidelines for the production of standards and using
the ECMA stylesheet. In order to avoid undue delays in the voting process of this ETS it has been agreed
that this ETS will not be converted to the ETSI stylesheet.
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1 Scope
This ETS specifies the signalling protocol for the support of Call Forwarding supplementary
services at the Q reference point between Private Telecommunication Network Exchanges
(PTNXs) connected together within a Private Telecommunication Network (PTN). The Call
Forwarding supplementary services are: Call Forwarding Unconditional (SS-CFU), Call Forwarding
Busy (SS-CFB), and Call Forwarding No Reply (SS-CFNR).
SS-CFU, SS-CFB and SS-CFNR are supplementary services which permit a served user to have
the PTN send all or specific incoming calls addressed to the served user's PTN number to another
number.
The Q reference point is defined in ENV 41004.
Service specifications are produced in three stages and according to the method specified in ENV
41005. This ETS contains the stage 3 specification for the Q reference point and satisfies the
requirements identified by the stage 1 and stage 2 specifications in ETS 300 256.
The signalling protocol for SS-CFU, SS-CFB and SS-CFNR operates on top of the signalling
protocol for basic circuit switched call control, as specified in ETS 300 172, and uses certain
aspects of the generic procedures for the control of supplementary services specified in ETS 300
239.
The impact on the protocol of interactions between the supplementary services specified in this
ETS and other supplementary services is outside the scope of this ETS.
This ETS is applicable to PTNXs which can be interconnected to form a PTN.
2 Conformance
In order to conform to this ETS, a PTNX shall satisfy the requirements identified in the Protocol
Implementation Conformance Statement (PICS) proforma in annex A.
3 References
ENV 41004 Reference configuration for connectivity relations of private
telecommunication network exchanges (1989).
ENV 41005 Method for the specification of basic and supplementary services of
private telecommunication networks (1989).
ENV 41007 Definition of terms in private telecommunication networks (1989).
ETS 300 171 Private Telecommunications Network (PTN); Specification, functional
models and information flows; Control aspects of circuit mode basic
services (1992).
ETS 300 172 Private Telecommunication Network (PTN); Inter-exchange signalling
protocol, Circuit mode basic services (1992).
ETS 300 189 Private Telecommunication Network (PTN); Addressing (1992).
ETS 300 196 ISDN - Generic Functional Protocol for the Support of Supplementary
Services - DSS1 Protocol.
ETS 300 238 Private Telecommunication Network (PTN); Signalling between private
telecommunication exchanges, Protocol for the support of name
identification supplementary services (1993).
ETS 300 239 Private Telecommunication Network (PTN); Signalling between private
telecommunication exchanges, Generic functional protocol for the
support of supplementary services (1993).
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ETS 300 256 Private Telecommunication Networks (PTN); Specification, Functional
Model and Information Flows, Diversion Supplementary Services
(1993).
prETS 300 207 Integrated Services Digital Network (ISDN) Diversion supplementary
services Digital Subscriber Signalling No. one (DSS1) protocol.
CCITT Recommendation I.112 Vocabulary of terms for ISDNs (1988).
CCITT Recommendation I.210 Principles of telecommunication services supported by
an ISDN and the means to describe them
(1988).
CCITT Recommendation I.221 Common specific characteristics of services (1988).
CCITT Recommendation Z.100 Specification and description language (1988).
4 Definitions
For the purpose of this ETS the following definitions apply.
4.1 External definitions
This ETS uses the following terms defined in other documents:
- Application Protocol Data Unit (ETS 300 239)
- Basic Service (CCITT Recommendation I.210)
- Call, Basic Call (ETS 300 239)
- Co-ordination Function (ETS 300 239)
- End PTNX (ETS 300 239)
- Incoming Gateway PTNX (ETS 300 172)
- Integrated Services Digital Network (CCITT Recommendation I.112)
- Interpretation APDU (ETS 300 239)
- Network determined user busy (CCITT Recommendation I.221)
- Notification (ETS 300 239)
- NFE (ETS 300 239)
- Originating PTNX (ETS 300 172)
- Outgoing Gateway PTNX (ETS 300 172)
- Private (ENV 41007)
- Private Telecommunication Network Exchange (ENV 41007)
- PTN number (ETS 300 189)
- Public ISDN (ENV 41007)
- Signalling (CCITT Recommendation I.112)
- Supplementary Service (CCITT Recommendation I.210)
- Supplementary Service Control Entity (ETS 300 239)
- Telecommunication Network (ENV 41007)
- Terminal, Terminal Equipment (ENV 41007)
- Terminating PTNX (ETS 300 172)
- Transit PTNX (ETS 300 172)
- User (ETS 300 171)
- User determined user busy (CCITT Recommendation I.221)
4.2 Activating PTNX
The PTNX serving the activating user.
4.3 Busy
An ISDN destination is considered to be busy if either a "network determined user busy" or a
"user determined user busy" condition exists.
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4.4 Connected number
The number of the user that answers (user C).
4.5 Deactivating PTNX
The PTNX serving the deactivating user.
4.6 Diversion
The redirection of a call, on request of a called user and prior to answer, to a number different
from the number of that called user.
4.7 Diverted-to number
The number to which a call is diverted.
4.8 Diverted-to PTNX
The PTNX serving the diverted-to user.
4.9 Diverted-to user
The user to which a call is diverted.
4.10 Diverting cause
The parameter which contains the reason for the diversion, e.g. CFU, CFB, CFNR.
4.11 Diverting number
The number of the served user.
4.12 Forwarding
The type of diversion invoked automatically by the network in accordance with information
previously registered in the network against the called number.
NOTE 1
Forwarding can occur as a result of the supplementary services specified in this ETS (CFU,
CFB, CFNR). Diversions of types other than forwarding (e.g. Call Deflection, whereby the
diversion is invoked by action of the called user) are outside the scope of this edition of this
ETS.
4.13 Forward switching
Network routing algorithm which performs the diversion by joining together the first connection
from user A's node to user B's node and a second, new connection from user B's node to user
C's node.
4.14 Interrogating PTNX
The PTNX serving the interrogating user.
4.15 Last diverting user
The served user from the point of view of the diverted-to user for a particular stage of call
diversion. In the case of a call subject to a single stage of call diversion, user B is the last
diverting user from the point of view of user C. In the case of a call subject to multiple stages of
call diversion, user B1 is the last diverting user from the point of view of user B2, user B2 is the
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last diverting user from the point of view of user B3, etc. The served user for the final stage of
call diversion is the last diverting user from the point of view of user C.
4.16 Original called number
The number of user B (in case of multiple call diversion user B1).
4.17 Original called user
The first served user of a call which is subject to one or more stages of call diversion, i.e. user B
or user B1.
4.18 Partial re-routing
Network routing algorithm which performs the call diversion by replacing a particular part of the
connection from user A's node (located in the public ISDN) to user B's node (located in a private
ISDN) by another connection from user A's node to user C's node (located in the public ISDN).
The new connection is established completely within the public ISDN by joining together the
original connection from user A's node to the public ISDN gateway node and a second, new
connection from the public ISDN gateway node to user C's node.
NOTE 2
Re-routing by a Transit PTNX is not considered as partial re-routing.
4.19 Presentation indicator
The indicator showing whether the diverted-to number should be presented to the calling user,
as derived from user C's COLR supplementary service.
4.20 Re-routing
Network routing algorithm which performs the call diversion by replacing the connection from
user A's node to user B's node by another connection, possibly using some of the elements of
the old connection, from user A's node to user C's node.
4.21 Re-routing PTNX
The PTNX which executes call diversion.
NOTE 3
In case of re-routing, the Re-routing PTNX is either the Originating PTNX or the Incoming
Gateway PTNX. In case of forward switching, the Re-routing PTNX is the Terminating PTNX.
4.22 Served user
The user of a particular PTN number who is requesting that calls to his number be diverted.
This user may also be referred to as the diverting user or the called user.
4.23 User A
The calling user of a call which is subject to call diversion.
4.24 User B
The served (diverting) user of a call which is subject to call diversion.
4.25 User B1, user B2, user B3, etc.
Served (diverting) users of a call which is subject to multiple stages of diversion. B1 is the first
served user, B2 is the second served user, B3 is the third served user, etc.
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NOTE 4
B2 is also the diverted-to user with respect to the first stage of call diversion, B3 is also the
diverted-to user with respect to the second stage of call diversion, etc.
4.26 User C
The diverted-to user with respect to the final stage of call diversion.
5 List of acronyms
APDU Application Protocol Data Unit
ASN.1 Abstrac
...
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