SIST ETS 300 324-1:1997

SLOVENSKI STANDARD
SIST ETS 300 324-1:1997
01-november-1997
Signalizacijski protokoli in komutacija (SPS) - Vmesniki "V" pri digitalnih krajevnih
centralah (LE) - Vmesnik V5.1 za podporo dostopovnega omrežja (AN) - 1. del:
Specifikacija vmesnika V5.1
V interfaces at the digital Local Exchange (LE); V5.1 interface for the support of Access
Network (AN); Part 1: V5.1 interface specification
Ta slovenski standard je istoveten z: ETS 300 324-1 Edition 1
ICS:
33.040.30 Komutacijski in signalizacijski Switching and signalling
sistem systems
SIST ETS 300 324-1:1997 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 324-1:1997

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SIST ETS 300 324-1:1997
EUROPEAN ETS 300 324-1
TELECOMMUNICATION February 1994
STANDARD
Source: ETSI TC-SPS Reference: DE/SPS-03003.1
ICS: 33.080
V interface, V5 interface, LE, AN
Key words:
Signalling Protocols and Switching (SPS);
V interfaces at the digital Local Exchange (LE)
V5.1 interface for the support of Access Network (AN)
Part 1: V5.1 interface specification
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 1994. 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 .13
Introduction.13
1 Scope .15
2 Normative references.16
3 Definitions, symbols and abbreviations.16
3.1 Definitions .16
3.2 Symbols and abbreviations.19
4 Electrical and physical interface requirements.21
5 Procedural interface requirements.21
6 Services and architecture aspects and requirements .21
6.1 On-demand services.21
6.1.1 PSTN.21
6.1.2 ISDN basic access .22
6.2 Permanent Line (PL) capability.22
6.3 Semi-permanent leased line .22
6.4 Permanent leased line services.23
7 Control and provisioning.23
7.1 Control principles .23
7.1.1 General requirements and assumptions .23
7.1.2 Control of ISDN user port for the PL capability .25
7.1.2.1 Statements and assumptions .25
7.1.2.2 ISDN and PL capability.25
7.1.2.3 Decoupling of AN and LE FSM.26
7.2 Provisioning strategy and requirements.26
7.2.1 General.26
7.2.2 Provisioning requirements.26
8 Protocol architecture and multiplexing structure .27
8.1 Functional description.27
8.2 Protocol requirements for PSTN and ISDN .28
8.3 Time slots .29
8.4 Time slot allocation for communication channels.29
8.5 Layer 2 sublayering and multiplexing on communication channels.30
8.6 Layer 3 multiplexing .30
8.7 Congestion control.31
8.7.1 Flow control end to end .31
8.7.2 Congestion control on the V5.1 interface .31
8.7.3 Blocking of ISDN user ports at layer 2 .31
9 Envelope Function sublayer of LAPV5 (LAPV5-EF) .31
9.1 Frame structure for peer-to-peer communication.31
9.1.1 General.31
9.1.2 Flag sequence.32
9.1.3 Interframe time fill.32
9.1.4 Envelope function address field .32
9.1.5 Envelope information field.32
9.1.6 Transparency .32
9.1.7 Frame Check Sequence (FCS).32

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9.1.8 Format convention. 33
9.1.9 Invalid frames . 33
9.1.10 Frame aborts . 33
9.2 Format of fields for data link envelope peer-to-peer communication. 33
9.2.1 Envelope function address field format . 33
9.2.2 Address field variables. 33
9.2.2.1 Address field extension bit . 33
9.2.2.2 EFaddr . 33
10 Data Link sublayer of LAPV5 (LAPV5-DL) . 34
10.1 Frame structure for peer-to-peer communication . 34
10.1.1 General . 34
10.1.2 Link address field. 34
10.1.3 Control field. 34
10.1.4 Information field . 34
10.1.5 Format convention. 34
10.2 Invalid frames. 34
10.3 Elements of procedures and formats of fields for data link sublayer peer-to-peer
communication. 35
10.3.1 Link address field format . 35
10.3.2 Link address field variables . 35
10.3.2.1 Address field extension (EA) bit. 35
10.3.2.2 Command/response field bit . 35
10.3.2.3 V5DLaddr. 35
10.3.3 Control field formats . 35
10.3.4 Control field parameters and associated state variables. 36
10.3.5 Frame types. 36
10.4 Definition of the peer-to-peer procedures of the data link sublayer . 36
10.4.1 General . 36
10.4.2 Procedure for the use of the Poll/Final (P/F) bit. 37
10.4.3 Terminal Endpoint Identifier (TEI) management procedures . 37
10.4.4 Automatic negotiation of data link layer parameters. 37
10.4.5 Procedures for establishment and release of multiple frame operation . 38
10.4.5.1 Establishment of multiple frame operation. 38
10.4.5.1.1 General. 38
10.4.5.1.2 Establishment procedures. 38
10.4.5.1.3 Procedure on expiry of timer T200. 39
10.4.5.2 Information transfer. 39
10.4.5.3 Termination of multiple frame operation . 39
10.4.5.4 Link-not-established state . 39
10.4.5.5 Collision of unnumbered commands and responses. 40
10.4.5.5.1 Identical transmitted and received
commands. 40
10.4.5.5.2 Different transmitted and received
commands. 40
10.4.5.6 Unsolicited DM response and SABME command. 40
10.4.6 Procedures for information transfer in multiple frame operation . 40
10.4.7 Re-establishment of multiple frame operation. 40
10.4.7.1 Criteria for re-establishment. 40
10.4.7.2 Procedures. 41
10.4.8 Exception condition reporting and recovery. 41
10.4.9 List of system parameters . 41
10.4.10 Data link monitor function . 41
10.4.10.1 General . 41
10.4.10.2 Data link layer supervision in the multiple-frame-
established state . 41
10.4.10.3 Connection verification procedures. 42
10.4.11 PSTN and control data link FSM and requirements . 42
10.4.11.1 General . 42
10.4.11.2 Data link FSM. 43
11 AN frame relay sublayer . 44
11.1 General. 44

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11.2 Invalid frames .44
11.3 Detailed description of the AN frame relay function.45
11.3.1 Frame received from LE.45
11.3.2 Frame received from ISDN user port .46
12 Sublayer-to-sublayer communication and mapping function .46
12.1 LAPV5-EF to LAPV5-DL communication.46
12.2 LAPV5-DL to LAPV5-EF communication.46
12.3 AN-FR to LAPV5-EF communication.46
12.4 LAPV5-EF to AN-FR communication.46
13 PSTN signalling protocol specification and layer 3 multiplexing .46
13.1 General .46
13.1.1 Introduction.46
13.1.2 Separation of responsibilities .47
13.1.3 National specific PSTN signal information elements.47
13.2 PSTN protocol entity definition.48
13.2.1 Definition of PSTN path states and explanation.48
13.2.1.1 Path states in the AN (AN(PSTN)) .48
13.2.1.2 Path states in the LE (LE(PSTN)).49
13.2.2 Definition of PSTN protocol primitives, messages and timers .49
13.3 PSTN protocol message definition and content.52
13.3.1 ESTABLISH.52
13.3.2 ESTABLISH ACK .53
13.3.3 SIGNAL .53
13.3.4 SIGNAL ACK.54
13.3.5 STATUS .54
13.3.6 STATUS ENQUIRY.54
13.3.7 DISCONNECT.55
13.3.8 DISCONNECT COMPLETE.55
13.3.9 PROTOCOL PARAMETER.55
13.4 General message format and information element coding.56
13.4.1 Overview.56
13.4.2 Protocol discriminator.56
13.4.3 Layer 3 address.57
13.4.4 Message type .57
13.4.5 Coding of other information elements .58
13.4.6 Single octet information elements .58
13.4.6.1 Pulse notification.58
13.4.6.2 Line-information.59
13.4.6.3 State .59
13.4.6.4 Autonomous-signalling-sequence .60
13.4.6.5 Sequence-response .60
13.4.7 Information elements with variable length format.61
13.4.7.1 Sequence-number .61
13.4.7.2 Cadenced-ringing .61
13.4.7.3 Pulsed-signal .62
13.4.7.4 Steady-signal .63
13.4.7.5 Digit-signal.64
13.4.7.6 Recognition-time.65
13.4.7.7 Enable-autonomous-acknowledge .66
13.4.7.8 Disable-autonomous-acknowledge .67
13.4.7.9 Cause .67
13.4.7.10 Resource-unavailable.68
13.5 PSTN call control procedures .69
13.5.1 General.69
13.5.2 Handling of error conditions .70
13.5.2.1 Protocol discriminator error .71
13.5.2.2 L3 address error .71
13.5.2.3 Message type error.71
13.5.2.4 Information element out of sequence .72
13.5.2.5 Repeated information elements.72
13.5.2.6 Mandatory information element missing.72

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13.5.2.7 Unrecognized information element . 73
13.5.2.8 Content error of mandatory information element . 73
13.5.2.9 Content error of optional information element. 73
13.5.2.10 Unexpected message . 74
13.5.2.11 Optional information element not allowed. 74
13.5.2.12 Optional information element missing. 74
13.5.2.13 Status enquiry procedure. 74
13.5.2.14 Status procedure. 76
13.5.3 Path related procedures . 76
13.5.3.1 Path initiation by AN. 77
13.5.3.1.1 Subscriber seizure request . 77
13.5.3.1.2 Subscriber seizure confirmation. 78
13.5.3.2 Path initiation by LE. 79
13.5.3.2.1 Establish request. 79
13.5.3.2.2 Establish acknowledge. 80
13.5.3.3 Path collision. 80
13.5.3.3.1 Originating call prevail. 80
13.5.3.3.2 Destination call prevail . 81
13.5.3.4 Path active . 81
13.5.3.4.1 Normal operation. 81
13.5.3.4.2 Exceptional procedures. 82
13.5.3.5 Disconnecting path. 82
13.5.3.5.1 Disconnect request . 83
13.5.3.5.2 Disconnect acknowledge . 84
13.5.3.6 Line information procedure . 84
13.5.3.6.1 Normal operation. 84
13.5.3.6.2 Exceptional procedures. 85
13.5.4 Non-path related procedures. 85
13.5.4.1 Protocol parameter procedures . 85
13.5.4.1.1 Normal operation. 85
13.5.4.1.2 Exceptional procedures. 86
13.5.4.2 Port blocking procedures . 86
13.5.4.3 Restart procedure . 86
13.5.5 Layer 3 error detection procedure . 87
13.5.5.1 Multiple SIGNAL message operation - variables,
sequence numbers and timers . 87
13.5.5.1.1 Modulus. 87
13.5.5.1.2 Send sequence variable S(S). 87
13.5.5.1.3 Acknowledge sequence variable S(A) . 87
13.5.5.1.4 Send sequence number M(S) . 88
13.5.5.1.5 Receive sequence variable S(R). 88
13.5.5.1.6 Receive sequence number M(R) . 88
13.5.5.1.7 Timer Tt. 88
13.5.5.1.8 Timer Tr. 88
13.5.5.2 Multiple SIGNAL message operation - procedures. 88
13.5.5.2.1 Initialization. 88
13.5.5.2.2 Sending a SIGNAL message . 88
13.5.5.2.3 Sending a SIGNAL ACK message. 88
13.5.5.2.4 Receiving a SIGNAL message. 89
13.5.5.2.5 Receiving a SIGNAL ACK message . 89
13.5.5.2.6 Start of timer Tr . 89
13.5.5.2.7 Stop of timer Tr . 89
13.5.5.2.8 Timeout of timer Tr. 89
13.5.5.2.9 Start of timer Tt . 89
13.5.5.2.10 Stop of timer Tt. 89
13.5.5.2.11 Timeout of timer Tt. 89
13.5.5.2.12 Receiving a DISCONNECT message. 89
13.5.5.3 Multiple SIGNAL message operation - values . 90
13.5.5.3.1 Number of outstanding SIGNAL
messages. 90
13.5.5.3.2 Timer Tt. 90
13.5.5.3.3 Timer Tr. 90
13.6 List of system parameters. 90

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13.7 AN and LE side state tables.91
14 Control requirements and protocol.97
14.1 ISDN user port status indication and control protocol.97
14.1.1 General aspects .97
14.1.2 Events and function elements relevant for the control of the state
machines.98
14.1.3 ISDN user port FSMs, AN (ISDN port) and LE (ISDN port) .99
14.1.3.1 Description of the states .100
14.1.3.2 Definition of port control states .100
14.1.3.2.1 ISDN user port FSM - AN(ISDN port).100
14.1.3.2.2 ISDN User port FSM - LE (ISDN port) 101
14.1.3.3 Principles and procedures .102
14.1.3.3.1 General .102
14.1.3.3.2 Blocking .102
14.1.3.3.3 Blocking request .102
14.1.3.3.4 Coordinated unblocking .102
14.1.3.3.5 Activation .103
14.1.3.4 ISDN port FSM at the AN .104
14.1.3.5 ISDN port FSM at the LE.106
14.1.4 Performance monitoring aspects .107
14.2 PSTN user port status indication and control protocol.107
14.2.1 General aspects .107
14.2.2 Events and function elements relevant for the control of the state
machines.108
14.2.3 PSTN user port FSM, AN (PSTN port) and LE (PSTN port).108
14.2.3.1 Description of the states .108
14.2.3.2 Definition of port control states .109
14.2.3.2.1 PSTN user port FSM - AN (PSTN
port).109
14.2.3.2.2 PSTN user port FSM - LE (PSTN port)109
14.2.3.3 Principles and procedures .110
14.2.3.3.1 General .110
14.2.3.3.2 Blocking .110
14.2.3.3.3 Blocking request .110
14.2.3.3.4 Coordinated unblocking .110
14.2.3.4 PSTN port FSM at the AN .111
14.2.3.5 PSTN port FSM at the LE.111
14.3 Interface layer 1 maintenance requirements and protocol.112
14.3.1 Events and failure reports .112
14.3.2 Detection algorithm for events and signals .113
14.3.3 V5.1 interface layer 1 FSM.113
14.3.4 Requirements and procedures for the additional functions.114
14.4 Control protocol.115
14.4.1 Control protocol message definition and content .115
14.4.1.1 PORT CONTROL message .115
14.4.1.2 PORT CONTROL ACK message.116
14.4.1.3 COMMON CONTROL message .116
14.4.1.4 COMMON CONTROL ACK message .117
14.4.2 General message format and information element coding .117
14.4.2.1 Overview.117
14.4.2.2 Protocol discriminator information
...