TS 27.002
Terminal Adaptation Functions (TAF) for Services
using Asynchronous Bearer Capabilities
V17.0.0 (PDF)
2022/03 27 p.
V16.0.0
2020/06 27 p.
V15.0.0
2018/06 26 p.
V14.0.0
2017/03 27 p.
V13.0.0
2015/12 27 p.
V12.0.0
2014/10 27 p.
V11.0.0
2012/09 27 p.
V10.0.1
2011/04 27 p.
V9.1.0
2011/01 27 p.
V8.1.0
2011/01 27 p.
V7.0.0
2007/06 27 p.
V6.0.0
2005/01 27 p.
V5.0.0
2002/01 27 p.
V4.0.0
2000/10 27 p.
V3.5.0
2000/10 27 p.
GSM Rel-98 v7.0.1
1999/08 27 p.
GSM Rel-97 v6.0.0
1999/06 24 p.
GSM Rel-96 v5.5.1
1998/01 24 p.
GSM Phase-2 v4.5.1
1994/08
GSM Phase-1 v3.8.0
1992/04 32 p.
- Rapporteur:
- Mrs. Biondic, Nevenka
Ericsson LM
full Table of Contents for TS 27.002 Word version: 17.0.0
1 Scope
2 Reference Configuration
3 Terminal Adaptation Functions for transparent services
4 Terminal Adaptation Functions for non-transparent services
5 Terminal interfacing to 3GPP TS 24.008 [8] Mapping
A L2R Functionality
B Use of a 9 pin connector as an MT2 type interface
C General mapping of ITU-T V.24 [19] circuits to channel status bits
$ Change history
1 Scope p. 6
The present document defines the interfaces and Terminal Adaptation Functions (TAF) integral to a Mobile Termination (MT) which enable the use of asynchronous bearer services in the PLMN and the attachment of asynchronous terminals to a MT (see TS 24.002 and TS 23.101).
The general aspects of Terminal Adaptation Functions are contained in TS 27.001.
The present document covers support of these services for the following interfaces and procedures:
- ITU-T V.14 [16] procedures.
- ITU-T V.21 [17] DTE/DCE interface.
- ITU-T V.22bis [18] DTE/DCE interface.
- ITU-T V.32 [24] DTE/DCE procedures.
- ITU-T I.420 [14] S interface.
- ITU-T V.250 [22] signalling procedures.
- the dual Bearer Services "alternate speech/data" and "speech followed by data";
- the dedicated services for PAD and Packet access;
- the BS 21 ... 26 and BS 31 ... 34.
1.1 References p. 6
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.
[1] Void.
[2]
TS 43.010: "GSM Public Land Mobile Network (PLMN) connection types".
[3]
TS 24.002: "GSM-UMTS Public Land Mobile Network (PLMN) access reference configuration".
[4]
TS 44.021: "Rate adaption on the Mobile Station - Base Station System (MS BSS) interface".
[5]
TS 22.002: "Circuit Bearer Services (BS) supported by a Public Land Mobile Network (PLMN)".
[6]
TS 23.101: "General UMTS Architecture".
[7]
TR 23.910: "Circuit Switched Data Bearer Services".
[8]
TS 24.008: "Mobile Radio Interface Layer 3 specification; Core Network Protocols-Stage 3".
[9]
TS 24.022: "Radio Link Protocol (RLP) for Circuit Switched Bearer and Teleservices".
[10]
TS 27.001: "General on Terminal Adaptation Functions (TAF) for Mobile Stations (MS)".
[11]
TS 27.007: "AT command set for 3G User Equipment (UE)".
[12]
TR 21.905: "Vocabulary for 3GPP Specifications".
[13]
TS 29.007: "General requirements on Interworking between the Public Land Mobile Network (PLMN) and the Integrated Services Digital Network (ISDN) or Public Switched Telephone Network (PSTN)".
[14]
ITU-T Recommendation I.420 (1998):"Basic user network interface".
[15]
ITU-T Recommendation V.4 (1988): "General structure of signals of international alphabet No.5 code for character oriented data transmission over public telephone networks".
[16]
ITU-T Recommendation V.14 (1993): "Transmission of start stop characters over synchronous bearer channels".
[17]
ITU-T Recommendation V.21 (1988): "300 bits per second duplex modem standardized for use in the general switched telephone network".
[18]
ITU-T Recommendation V.22bis (1988): "2400 bits per second duplex modem using the frequency division technique standardized for use on the general switched telephone network and on point-to-point 2-wire leased telephone-type circuits".
[19]
ITU-T Recommendation V.24 (1996): "List of definitions for interchange circuits between data terminal equipment (DTE) and data circuit terminating equipment (DCE)".
[20]
ITU-T Recommendation V.25 (1996): "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".
[21] Void.
[22]
ITU-T Recommendation V.250 (1999): "Serial asynchronous automatic dialling and control".
[23]
ITU-T Recommendation V.28 (1993): "Electrical characteristics for unbalanced double-current interchange circuits".
[24]
ITU-T Recommendation V.32 (1993): "A family of 2 wire, duplex modems operating at data signalling rates of up to 9600 bit/s for use in the general switched telephone network and on leased telephone type circuits".
[25]
ITU-T Recommendation V.42 (1996): "Error correcting procedures for DCEs using asynchronous to synchronous conversion".
[26]
ITU-T Recommendation V.42 bis (1990): "Data compression procedures for data circuit-terminating equipment (DCE) using error correction procedures".
[27]
ITU-T Recommendation V.110 (1996): "Support of data terminal equipments with V Series interfaces by an integrated services digital network".
[28]
ITU-T Recommendation X.28 (1997): "DTE/DCE interface for a start stop mode Data Terminal Equipment accessing the Packet Assembly/Disassembly facility (PAD) in a public data network situated in the same country".
[29]
Personal Computer Memory Card Association: "PCMCIA 2.1 or PC Card 3.0 electrical specification or later revisions".
[30]
Infrared Data Association IrDA: "IrPHY Physical layer signalling standard".
[31]
ISO 2110 (1989): "Data communication - 25-pole DTE/DCE interface connector and contact number assignments".
[32]
ITU-T Recommendation Q.931 (1998): "ISDN user-network interface layer 3 specification for basic call control".
1.2 Abbreviations p. 8
In addition to the abbreviations used in the present document that are listed in TR 21.905 the following internal abbreviations are used:
CFI
Call Failure Indication
CRN
Call Request with Number
DIC
Disregard Incoming Call
IA5
International Alphabet no. 5
INC
INcoming Call
INV
INValid
ITU-T
ITU-Telecommunication Standardization Sector
VAL
VALid
1.3 Definitions p. 8
The term 'mobile station' (MS) in the present document is synonymous with the term 'user equipment' (UE ) as defined in TR 21.905.
The term 'TE2' in the present document is synonymous with the term 'TE' as defined in TR 21.905.
The term 'MT2' in the present document is synonymous with the term 'MT' as defined in TR 21.905.
In addition to the definitions used in the present document that are listed in TR 21.905 the following internal definitions are used:
A/Gb mode:
indicates that the text applies only to a system or sub-system which operate in A/Gb mode of operation, i.e. with a functional division that is in accordance with the use of an A or a Gb interface between the radio access network and the core network
Iu mode:
indicates that the text applies only to a system or a sub-system which operates in Iu mode of operation, i.e. with a functional division that is in accordance with the use of an Iu-CS or Iu-PS interface between the radio access network and the core network
2 Reference Configuration p. 8
3 Terminal Adaptation Functions for transparent services p. 9
3.1 Rate Adaptation in A/Gb mode p. 9
3.1.1 Rate Adaptation - R interface p. 9
3.1.2 Rate Adaptation - S Interface (ITU-T I.420 [14]) p. 9
3.2 Interchange Circuit Signalling Mapping - ITU-T V-series interface p. 9
3.2.1 Mapping of V.24 [19] circuits to status bits p. 9
3.2.2 Single slot configurations (TCH/F9.6 or TCH/F4.8) p. 10
3.2.3 Multislot configurations (TCH/F9.6 or TCH/F4.8) p. 10
3.2.4 Channel codings TCH/F14.4, TCH/F28.8 p. 10
3.3 Interface Signal Levels - R interface p. 10
3.4 Call Establishment and Clearing Signalling Mapping p. 11
4 Terminal Adaptation Functions for non-transparent services p. 11
4.1 Data Structure p. 11
4.1.1 Data Structure on S Interface p. 11
4.1.2 Data Structure on R Interface p. 12
4.1.3 Data Structure Provided by the L2R Function to the RLP Function p. 12
4.2 Signalling Mapping p. 12
4.2.1 Interchange Circuit Signalling Mapping - ITU-T V-series interface p. 12
4.2.2 Call Establishment and Clearing Signalling Mapping p. 13
4.3 Flow Control p. 13
4.3.1 Conditions Requiring Flow Control towards the Network p. 13
4.3.2 Conditions Requiring Flow Control towards TE2 p. 13
4.3.3 Local Flow Control p. 13
4.3.4 Character Orientated Protocol with No Flow Control p. 14
4.4 Buffers p. 14
4.4.1 TX Buffers p. 14
4.4.2 RX Buffers p. 14
4.5 Bit Transparency p. 14
4.6 Transportation of "BREAK" condition p. 14
4.7 Data Compression p. 14
5 Terminal interfacing to 3GPP TS 24.008 [8] Mapping p. 15
5.1 Mobile Originated Calls p. 16
5.2 Mobile Terminated Calls p. 16
5.3 Call Clearing p. 17
5.3.1 Mobile initiated p. 17
5.3.2 Network initiated p. 17
A (Normative) L2R Functionality p. 18
A.1 Introduction p. 18
A.2 The L2RCOP p. 18
A.3 Use of the L2RCOP p. 21
A.3.1 Radio Link Connection Control p. 21
A.3.2 Data Transfer p. 21
A.3.3 Status Transfer p. 21
A.3.4 Flow Control p. 21
A.3.5 Break p. 21
B Use of a 9 pin connector as an MT2 type interface p. 23
C General mapping of ITU-T V.24 [19] circuits to channel status bits p. 24
$ Change history p. 25
