SIST TBR 034:2000
(Main)Integrated Services Digital Network (ISDN); Attachment requirements for packet mode terminal equipment to connect to an ISDN using ISDN primary rate access
Integrated Services Digital Network (ISDN); Attachment requirements for packet mode terminal equipment to connect to an ISDN using ISDN primary rate access
This TBR will define the attachment requirements for packet-mode terminals to access the ISDN packet-mode bearer service using an ISDN primary rate access. Only essential requirements contained in ETS 300 007 will be covered. This TBR will form the basis of CTR 034 in accordance with the scope from TRAC.
Digitalno omrežje z integriranimi storitvami (ISDN) - Zahteve za priključitev terminalske opreme v paketnem načinu na ISDN z uporabo primarnega dostopa
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
3SIST TBR 034:
01DYJXVW
'LJLWDOQRRPUHåMH]LQWHJULUDQLPLVWRULWYDPL ,6'1 =DKWHYH]DSULNOMXþLWHY
WHUPLQDOVNHRSUHPHYSDNHWQHPQDþLQXQD,6'1]XSRUDERSULPDUQHJDGRVWRSD
Integrated Services Digital Network (ISDN); Attachment requirements for packet mode
terminal equipment to connect to an ISDN using ISDN primary rate access
Ta slovenski standard je istoveten z: TBR 034 Edition 1
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
3SIST TBR 034: en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST TBR 034:2000
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SIST TBR 034:2000
TECHNICAL TBR 34
BASIS for December 1997
REGULATION
Source: SPS Reference: DTBR/SPS-05120
ICS: 33.020
Key words: ISDN, packet mode, terminal, primary, access
Integrated Services Digital Network (ISDN);
Attachment requirements for packet mode terminal equipment
to connect to an ISDN using ISDN primary rate access
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.fr
Tel.: +33 4 92 94 42 00 - Fax: +33 4 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 1997. All rights reserved.
---------------------- Page: 3 ----------------------
SIST TBR 034:2000
Page 2
TBR 34: December 1997
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.
---------------------- Page: 4 ----------------------
SIST TBR 034:2000
Page 3
TBR 34: December 1997
Contents
Foreword .9
1 Scope .11
2 Normative references.11
3 Definitions and abbreviations .12
3.1 Definitions .12
3.2 Abbreviations .13
4 General.14
4.1 General requirements for the access of the PH .14
4.1.1 Channel used for the access of the PH.14
4.1.2 Requirements for layer 1.15
4.1.2.1 Requirements for complete layer 1 (comprising D-channel
and B-channels as a whole) .15
4.1.2.2 Requirements for layer 1 with respect to the selected
channel .15
4.1.3 Requirements for layer 2 of the D-channel.15
4.1.3.1 Requirements for data link connections with SAPI 0.15
4.1.3.2 Requirements for data link connections with SAPI 16.16
4.1.4 Notification classes.16
4.1.5 Requirements for layer 3 of the D-channel.16
4.1.5.1 Outgoing calls.16
4.1.5.2 Incoming calls.17
4.1.5.3 Use of outgoing and incoming calls to support access of
the PH.17
5 Definitions of primitives .17
6 Safety requirements .17
7 Electro-Magnetic Compatibility (EMC) requirements .17
8 Overvoltage protection requirements .18
8.1 Impulse transfer from mains, common mode.18
8.2 Impulse transfer from mains, transverse mode.18
8.3 Conversion of common mode to transverse mode.18
9 Layer 1 requirements .18
9.1 Physical characteristics (on-demand access).18
9.2 Specification at the output port .18
9.3 Specification at the input port.18
9.4 Frame structure .18
9.5 Operational functions.18
9.6 Semi-permanent B-channel access.18
10 Layer 2 D-channel requirements.19
10.1 Frame structure for peer-to-peer communication.19
10.1.1 General.19
10.1.2 Flag sequence.19
10.1.3 Address field.19
10.1.4 Control field .19
10.1.5 Information field.20
10.1.6 Transparency .20
10.1.7 Frame Check Sequence (FCS) field .20
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10.1.8 Format convention. 20
10.1.8.1 Numbering convention . 20
10.1.8.2 Order of bit transmission. 20
10.1.8.3 Field mapping convention . 20
10.1.9 Invalid or incompatible frames. 20
10.2 Elements of procedures and formats of fields for data link layer peer-to-peer
communication. 20
10.2.1 General . 20
10.2.2 Address field format. 20
10.2.3 Address field variables. 20
10.2.3.1 Address field extension bit (EA). 20
10.2.3.2 Command/Response field bit (C/R) . 21
10.2.3.3 Service Access Point Identifier (SAPI). 21
10.2.3.4 Terminal Endpoint Identifier (TEI). 21
10.2.3.4.1 TEI for broadcast data link connection. 21
10.2.3.4.2 TEI for point-to-point data link
connection. 21
10.2.4 Control field formats . 21
10.2.4.1 Information transfer (I) format. 21
10.2.4.2 Supervisory (S) format . 21
10.2.4.3 Unnumbered (U) format. 21
10.2.5 Control field parameters and associated state variables. 22
10.2.5.1 Poll/Final bit. 22
10.2.5.2 Multiple frame operation - variables and sequence
numbers . 22
10.2.5.2.1 Modulus. 22
10.2.5.2.2 Send state variable V(S) . 22
10.2.5.2.3 Acknowledge state variable V(A) . 22
10.2.5.2.4 Send sequence number N(S). 22
10.2.5.2.5 Receive state variable V(R). 22
10.2.5.2.6 Receive sequence number N(R). 22
10.2.6 Frame types. 22
10.2.6.1 Commands and responses. 22
10.2.6.2 Information (I) command. 23
10.2.6.3 Set Asynchronous Balanced Mode Extended (SABME)
command . 23
10.2.6.4 DISConnect (DISC) command. 23
10.2.6.5 Unnumbered Information (UI) command . 23
10.2.6.6 Receive Ready (RR) command/response . 24
10.2.6.7 REJect (REJ) command/response . 24
10.2.6.8 Receive Not Ready (RNR) command/response . 24
10.2.6.9 Unnumbered Acknowledgement (UA) response . 24
10.2.6.10 Disconnected Mode (DM) response . 24
10.3 Provision of point-to-point signalling connections . 24
10.4 Procedures for unacknowledged information transfer . 24
10.4.1 Transmission of unacknowledged information . 24
10.4.2 Receipt of unacknowledged information. 24
10.5 Terminal Endpoint Identifier (TEI) management procedures. 25
10.5.1 General . 25
10.5.2 TEI assignment procedure . 25
10.5.2.1 Expiry of timer T202. 25
10.5.3 TEI check procedure . 25
10.5.4 TEI removal procedure . 25
10.5.4.1 Action taken by the data link layer entity receiving the
MDL-REMOVE-REQUEST primitive. 25
10.5.4.2 Conditions for TEI removal . 25
10.5.5 TEI identity verify procedure . 25
10.5.5.1 General . 25
10.5.5.2 Operation of the TEI identity verify procedure. 25
10.5.6 Formats and codes. 25
10.6 Procedures for establishment and release of multiple frame operation. 26
10.6.1 Establishment of multiple frame operation . 26
10.6.1.1 General . 26
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10.6.1.2 Establishment procedures.26
10.6.1.2.1 Establishment initiation .26
10.6.1.2.2 Establishment response .26
10.6.1.3 Procedure on expiry of timer T200 .27
10.6.2 Termination of multiple frame operation.27
10.7 Procedures for information transfer in multiple frame operation .27
10.7.1 Transmitting I-frames .27
10.7.2 Receiving I-frames .27
10.7.2.1 P bit set to 1.27
10.7.2.2 P bit set to 0.27
10.7.3 Receiving acknowledgements.28
10.7.4 Receiving REJ frames.28
10.7.5 Receiving RNR frames.29
10.7.5.1 Receiving a valid RNR command or response.29
10.7.5.2 Expiry of timer T200 during "peer receiver busy" .29
10.7.5.3 Receiving a valid RNR command or response during
"peer receiver busy".30
10.7.5.4 Receiving a valid RR or REJ command or response
during "peer receiver busy".30
10.7.5.5 Appropriate supervisory response frame.30
10.7.6 Waiting acknowledgement .31
10.8 Re-establishment of multiple frame operation .31
10.9 Exception condition reporting and recovery.32
10.9.1 N(S) sequence error.32
10.9.2 Invalid frame condition .32
10.9.3 Frame rejection condition.32
10.9.4 Multiple-assignment of TEI value .32
10.10 List of system parameters.33
10.10.1 Timer T200.33
10.10.2 Maximum number of retransmissions (N200).33
10.10.3 Maximum number of octets in an information field (N201) .33
10.10.4 Maximum number of transmission of the TEI identity request message
(N202) .33
10.10.5 Maximum number of outstanding I-frames (k) .33
10.10.6 Timer T202.33
10.10.7 Layer 2 response time.33
11 Layer 3 D-channel requirements.34
11.1 Overview of call control.34
11.1.1 Call states at the user side of the interface .34
11.1.1.1 Null state (U0).34
11.1.1.2 Call initiated (U1) .34
11.1.1.3 Outgoing call proceeding (U3).34
11.1.1.4 Call present (U6).34
11.1.1.5 Call received (U7).35
11.1.1.6 Connect request (U8) .35
11.1.1.7 Incoming call proceeding (U9).35
11.1.1.8 Active (U10).35
11.1.1.9 Disconnect request (U11).35
11.1.1.10 Disconnect indication (U12).35
11.1.1.11 Release request (U19) .35
11.1.2 Network call states .35
11.1.2.1 Null state (N0).35
11.1.2.2 Call initiated (N1) .35
11.1.2.3 Outgoing call proceeding (N3).35
11.1.2.4 Call present (N6).36
11.1.2.5 Call received (N7).36
11.1.2.6 Connect request (N8) .36
11.1.2.7 Incoming call proceeding (N9).36
11.1.2.8 Active (N10).36
11.1.2.9 Disconnect request (N11).36
11.1.2.10 Disconnect indication (N12).36
11.1.2.11 Release request (N19) .36
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11.1.3 States associated with the global call reference. 37
11.1.3.1 Call states at the user side of the interface. 37
11.1.3.1.1 Null (Rest 0) . 37
11.1.3.1.2 Restart (Rest 2). 37
11.1.3.2 Call states at the network side of the interface . 37
11.1.3.2.1 Null (Rest 0) . 37
11.1.3.2.2 Restart request (Rest 1). 37
11.2 Message functional definitions and content . 37
11.2.1 Alerting. 38
11.2.2 Call proceeding. 39
11.2.3 Connect . 39
11.2.4 Connect acknowledge . 40
11.2.5 Disconnect. 40
11.2.6 Release. 41
11.2.7 Release complete. 41
11.2.8 Setup . 42
11.2.9 Status. 43
11.2.10 Status enquiry. 43
11.2.11 Messages used with the global call reference. 43
11.2.11.1 Restart. 43
11.2.11.2 Restart acknowledge . 43
11.3 General message format and information elements coding . 44
11.3.1 Overview. 44
11.3.2 Protocol discriminator . 44
11.3.3 Call reference . 44
11.3.4 Message type. 44
11.3.5 Other information elements . 46
11.3.5.1 Coding rules. 46
11.3.5.1.1 Codeset 0. 46
11.3.5.2 Extensions of codesets. 47
11.3.5.3 Locking shift procedure. 47
11.3.5.4 Non-locking shift procedure . 47
11.3.5.5 Bearer capability . 47
11.3.5.6 Call state . 49
11.3.5.7 Called party number. 49
11.3.5.8 Called party subaddress . 49
11.3.5.9 Calling party number. 49
11.3.5.10 Calling party subaddress. 51
11.3.5.11 Cause. 52
11.3.5.12 Channel identification. 52
11.3.5.13 Restart indicator. 52
11.4 Call control procedures for the control of packet-mode access of the PH. 53
11.4.1 Call establishment at the originating interface. 53
11.4.1.1 Call request. 53
11.4.1.2 Overlap sending. 53
11.4.1.3 Call proceeding . 53
11.4.1.4 Call confirmation indication . 54
11.4.1.5 Call connected . 54
11.4.2 Call establishment at the destination interface . 54
11.4.2.1 Incoming call . 54
11.4.2.2 Compatibility checking . 54
11.4.2.3 Channel selection-destination. 55
11.4.2.4 Overlap receiving . 55
11.4.2.5 Call confirmation . 55
11.4.2.6 Call accept . 56
11.4.2.7 Active indication . 56
11.4.3 Call clearing . 56
11.4.3.1 Terminology . 56
11.4.3.2 Exception conditions . 56
11.4.3.3 Clearing initiated by the user. 56
11.4.3.4 Clearing initiated by the network . 57
11.4.3.4.1 Clearing when tones/announcements
provided. 57
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11.4.3.4.2 Clearing when tones/announcements
not provided .57
11.4.3.4.3 Completion of clearing .57
11.4.3.5 Clear collision .57
11.4.4 Call rearrangements.57
11.4.5 Call collisions.58
11.4.6 Handling of error conditions .58
11.4.6.1 Call reference procedural errors.58
11.4.6.2 Message type or message sequence errors .58
11.4.6.3 Duplicated information elements .58
11.4.6.4 Mandatory information element errors.58
11.4.6.4.1 Mandatory information element
missing.58
11.4.6.5 Non-mandatory information element errors.59
11.4.6.5.1 Unrecognized information element.59
11.4.6.5.2 Non-mandatory information element
content error .59
11.4.6.6 Status enquiry procedure.60
11.4.6.7 Receiving a STATUS message.60
11.4.7 User notification procedure .61
11.4.8 Restart procedure.61
11.5 TE timers .61
12 X.25.62
12.1 X.25 requirements .62
12.2 X.25 procedures .62
12.2.1 Data link protocol supporting the X.25 packet level protocol .62
12.2.2 X.25 packet level protocol .62
12.2.3 Outgoing and incoming virtual calls.62
12.2.4 Identification of X.25 terminals .62
Annex A (normative): TBR Requirements Table (TBR-RT).63
A.1 Guidance for completion of the TBR-RT.63
A.2 General classification of requirements TBR-RT.64
A.3 Layer 1 and overvoltage requirements TBR-RT .66
A.4 Layer 2 TBR-RT .69
A.5 Layer 3 TBR-RT .72
Annex B (normative): Layer 1 tests .74
Annex C (normative): Layer 2 tests .75
C.1 The TTCN Graphical form (TTCN.GR) .75
C.2 The TTCN Machine Processable form (TTCN.MP) .75
...
SLOVENSKI STANDARD
SIST TBR 034:2000
01-junij-2000
'LJLWDOQRRPUHåMH]LQWHJULUDQLPLVWRULWYDPL ,6'1 =DKWHYH]DSULNOMXþLWHY
WHUPLQDOVNHRSUHPHYSDNHWQHPQDþLQXQD,6'1]XSRUDERSULPDUQHJDGRVWRSD
Integrated Services Digital Network (ISDN); Attachment requirements for packet mode
terminal equipment to connect to an ISDN using ISDN primary rate access
Ta slovenski standard je istoveten z: TBR 034 Edition 1
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
SIST TBR 034:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST TBR 034:2000
---------------------- Page: 2 ----------------------
SIST TBR 034:2000
TECHNICAL TBR 34
BASIS for December 1997
REGULATION
Source: SPS Reference: DTBR/SPS-05120
ICS: 33.020
Key words: ISDN, packet mode, terminal, primary, access
Integrated Services Digital Network (ISDN);
Attachment requirements for packet mode terminal equipment
to connect to an ISDN using ISDN primary rate access
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.fr
Tel.: +33 4 92 94 42 00 - Fax: +33 4 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 1997. All rights reserved.
---------------------- Page: 3 ----------------------
SIST TBR 034:2000
Page 2
TBR 34: December 1997
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.
---------------------- Page: 4 ----------------------
SIST TBR 034:2000
Page 3
TBR 34: December 1997
Contents
Foreword .9
1 Scope .11
2 Normative references.11
3 Definitions and abbreviations .12
3.1 Definitions .12
3.2 Abbreviations .13
4 General.14
4.1 General requirements for the access of the PH .14
4.1.1 Channel used for the access of the PH.14
4.1.2 Requirements for layer 1.15
4.1.2.1 Requirements for complete layer 1 (comprising D-channel
and B-channels as a whole) .15
4.1.2.2 Requirements for layer 1 with respect to the selected
channel .15
4.1.3 Requirements for layer 2 of the D-channel.15
4.1.3.1 Requirements for data link connections with SAPI 0.15
4.1.3.2 Requirements for data link connections with SAPI 16.16
4.1.4 Notification classes.16
4.1.5 Requirements for layer 3 of the D-channel.16
4.1.5.1 Outgoing calls.16
4.1.5.2 Incoming calls.17
4.1.5.3 Use of outgoing and incoming calls to support access of
the PH.17
5 Definitions of primitives .17
6 Safety requirements .17
7 Electro-Magnetic Compatibility (EMC) requirements .17
8 Overvoltage protection requirements .18
8.1 Impulse transfer from mains, common mode.18
8.2 Impulse transfer from mains, transverse mode.18
8.3 Conversion of common mode to transverse mode.18
9 Layer 1 requirements .18
9.1 Physical characteristics (on-demand access).18
9.2 Specification at the output port .18
9.3 Specification at the input port.18
9.4 Frame structure .18
9.5 Operational functions.18
9.6 Semi-permanent B-channel access.18
10 Layer 2 D-channel requirements.19
10.1 Frame structure for peer-to-peer communication.19
10.1.1 General.19
10.1.2 Flag sequence.19
10.1.3 Address field.19
10.1.4 Control field .19
10.1.5 Information field.20
10.1.6 Transparency .20
10.1.7 Frame Check Sequence (FCS) field .20
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10.1.8 Format convention. 20
10.1.8.1 Numbering convention . 20
10.1.8.2 Order of bit transmission. 20
10.1.8.3 Field mapping convention . 20
10.1.9 Invalid or incompatible frames. 20
10.2 Elements of procedures and formats of fields for data link layer peer-to-peer
communication. 20
10.2.1 General . 20
10.2.2 Address field format. 20
10.2.3 Address field variables. 20
10.2.3.1 Address field extension bit (EA). 20
10.2.3.2 Command/Response field bit (C/R) . 21
10.2.3.3 Service Access Point Identifier (SAPI). 21
10.2.3.4 Terminal Endpoint Identifier (TEI). 21
10.2.3.4.1 TEI for broadcast data link connection. 21
10.2.3.4.2 TEI for point-to-point data link
connection. 21
10.2.4 Control field formats . 21
10.2.4.1 Information transfer (I) format. 21
10.2.4.2 Supervisory (S) format . 21
10.2.4.3 Unnumbered (U) format. 21
10.2.5 Control field parameters and associated state variables. 22
10.2.5.1 Poll/Final bit. 22
10.2.5.2 Multiple frame operation - variables and sequence
numbers . 22
10.2.5.2.1 Modulus. 22
10.2.5.2.2 Send state variable V(S) . 22
10.2.5.2.3 Acknowledge state variable V(A) . 22
10.2.5.2.4 Send sequence number N(S). 22
10.2.5.2.5 Receive state variable V(R). 22
10.2.5.2.6 Receive sequence number N(R). 22
10.2.6 Frame types. 22
10.2.6.1 Commands and responses. 22
10.2.6.2 Information (I) command. 23
10.2.6.3 Set Asynchronous Balanced Mode Extended (SABME)
command . 23
10.2.6.4 DISConnect (DISC) command. 23
10.2.6.5 Unnumbered Information (UI) command . 23
10.2.6.6 Receive Ready (RR) command/response . 24
10.2.6.7 REJect (REJ) command/response . 24
10.2.6.8 Receive Not Ready (RNR) command/response . 24
10.2.6.9 Unnumbered Acknowledgement (UA) response . 24
10.2.6.10 Disconnected Mode (DM) response . 24
10.3 Provision of point-to-point signalling connections . 24
10.4 Procedures for unacknowledged information transfer . 24
10.4.1 Transmission of unacknowledged information . 24
10.4.2 Receipt of unacknowledged information. 24
10.5 Terminal Endpoint Identifier (TEI) management procedures. 25
10.5.1 General . 25
10.5.2 TEI assignment procedure . 25
10.5.2.1 Expiry of timer T202. 25
10.5.3 TEI check procedure . 25
10.5.4 TEI removal procedure . 25
10.5.4.1 Action taken by the data link layer entity receiving the
MDL-REMOVE-REQUEST primitive. 25
10.5.4.2 Conditions for TEI removal . 25
10.5.5 TEI identity verify procedure . 25
10.5.5.1 General . 25
10.5.5.2 Operation of the TEI identity verify procedure. 25
10.5.6 Formats and codes. 25
10.6 Procedures for establishment and release of multiple frame operation. 26
10.6.1 Establishment of multiple frame operation . 26
10.6.1.1 General . 26
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10.6.1.2 Establishment procedures.26
10.6.1.2.1 Establishment initiation .26
10.6.1.2.2 Establishment response .26
10.6.1.3 Procedure on expiry of timer T200 .27
10.6.2 Termination of multiple frame operation.27
10.7 Procedures for information transfer in multiple frame operation .27
10.7.1 Transmitting I-frames .27
10.7.2 Receiving I-frames .27
10.7.2.1 P bit set to 1.27
10.7.2.2 P bit set to 0.27
10.7.3 Receiving acknowledgements.28
10.7.4 Receiving REJ frames.28
10.7.5 Receiving RNR frames.29
10.7.5.1 Receiving a valid RNR command or response.29
10.7.5.2 Expiry of timer T200 during "peer receiver busy" .29
10.7.5.3 Receiving a valid RNR command or response during
"peer receiver busy".30
10.7.5.4 Receiving a valid RR or REJ command or response
during "peer receiver busy".30
10.7.5.5 Appropriate supervisory response frame.30
10.7.6 Waiting acknowledgement .31
10.8 Re-establishment of multiple frame operation .31
10.9 Exception condition reporting and recovery.32
10.9.1 N(S) sequence error.32
10.9.2 Invalid frame condition .32
10.9.3 Frame rejection condition.32
10.9.4 Multiple-assignment of TEI value .32
10.10 List of system parameters.33
10.10.1 Timer T200.33
10.10.2 Maximum number of retransmissions (N200).33
10.10.3 Maximum number of octets in an information field (N201) .33
10.10.4 Maximum number of transmission of the TEI identity request message
(N202) .33
10.10.5 Maximum number of outstanding I-frames (k) .33
10.10.6 Timer T202.33
10.10.7 Layer 2 response time.33
11 Layer 3 D-channel requirements.34
11.1 Overview of call control.34
11.1.1 Call states at the user side of the interface .34
11.1.1.1 Null state (U0).34
11.1.1.2 Call initiated (U1) .34
11.1.1.3 Outgoing call proceeding (U3).34
11.1.1.4 Call present (U6).34
11.1.1.5 Call received (U7).35
11.1.1.6 Connect request (U8) .35
11.1.1.7 Incoming call proceeding (U9).35
11.1.1.8 Active (U10).35
11.1.1.9 Disconnect request (U11).35
11.1.1.10 Disconnect indication (U12).35
11.1.1.11 Release request (U19) .35
11.1.2 Network call states .35
11.1.2.1 Null state (N0).35
11.1.2.2 Call initiated (N1) .35
11.1.2.3 Outgoing call proceeding (N3).35
11.1.2.4 Call present (N6).36
11.1.2.5 Call received (N7).36
11.1.2.6 Connect request (N8) .36
11.1.2.7 Incoming call proceeding (N9).36
11.1.2.8 Active (N10).36
11.1.2.9 Disconnect request (N11).36
11.1.2.10 Disconnect indication (N12).36
11.1.2.11 Release request (N19) .36
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11.1.3 States associated with the global call reference. 37
11.1.3.1 Call states at the user side of the interface. 37
11.1.3.1.1 Null (Rest 0) . 37
11.1.3.1.2 Restart (Rest 2). 37
11.1.3.2 Call states at the network side of the interface . 37
11.1.3.2.1 Null (Rest 0) . 37
11.1.3.2.2 Restart request (Rest 1). 37
11.2 Message functional definitions and content . 37
11.2.1 Alerting. 38
11.2.2 Call proceeding. 39
11.2.3 Connect . 39
11.2.4 Connect acknowledge . 40
11.2.5 Disconnect. 40
11.2.6 Release. 41
11.2.7 Release complete. 41
11.2.8 Setup . 42
11.2.9 Status. 43
11.2.10 Status enquiry. 43
11.2.11 Messages used with the global call reference. 43
11.2.11.1 Restart. 43
11.2.11.2 Restart acknowledge . 43
11.3 General message format and information elements coding . 44
11.3.1 Overview. 44
11.3.2 Protocol discriminator . 44
11.3.3 Call reference . 44
11.3.4 Message type. 44
11.3.5 Other information elements . 46
11.3.5.1 Coding rules. 46
11.3.5.1.1 Codeset 0. 46
11.3.5.2 Extensions of codesets. 47
11.3.5.3 Locking shift procedure. 47
11.3.5.4 Non-locking shift procedure . 47
11.3.5.5 Bearer capability . 47
11.3.5.6 Call state . 49
11.3.5.7 Called party number. 49
11.3.5.8 Called party subaddress . 49
11.3.5.9 Calling party number. 49
11.3.5.10 Calling party subaddress. 51
11.3.5.11 Cause. 52
11.3.5.12 Channel identification. 52
11.3.5.13 Restart indicator. 52
11.4 Call control procedures for the control of packet-mode access of the PH. 53
11.4.1 Call establishment at the originating interface. 53
11.4.1.1 Call request. 53
11.4.1.2 Overlap sending. 53
11.4.1.3 Call proceeding . 53
11.4.1.4 Call confirmation indication . 54
11.4.1.5 Call connected . 54
11.4.2 Call establishment at the destination interface . 54
11.4.2.1 Incoming call . 54
11.4.2.2 Compatibility checking . 54
11.4.2.3 Channel selection-destination. 55
11.4.2.4 Overlap receiving . 55
11.4.2.5 Call confirmation . 55
11.4.2.6 Call accept . 56
11.4.2.7 Active indication . 56
11.4.3 Call clearing . 56
11.4.3.1 Terminology . 56
11.4.3.2 Exception conditions . 56
11.4.3.3 Clearing initiated by the user. 56
11.4.3.4 Clearing initiated by the network . 57
11.4.3.4.1 Clearing when tones/announcements
provided. 57
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11.4.3.4.2 Clearing when tones/announcements
not provided .57
11.4.3.4.3 Completion of clearing .57
11.4.3.5 Clear collision .57
11.4.4 Call rearrangements.57
11.4.5 Call collisions.58
11.4.6 Handling of error conditions .58
11.4.6.1 Call reference procedural errors.58
11.4.6.2 Message type or message sequence errors .58
11.4.6.3 Duplicated information elements .58
11.4.6.4 Mandatory information element errors.58
11.4.6.4.1 Mandatory information element
missing.58
11.4.6.5 Non-mandatory information element errors.59
11.4.6.5.1 Unrecognized information element.59
11.4.6.5.2 Non-mandatory information element
content error .59
11.4.6.6 Status enquiry procedure.60
11.4.6.7 Receiving a STATUS message.60
11.4.7 User notification procedure .61
11.4.8 Restart procedure.61
11.5 TE timers .61
12 X.25.62
12.1 X.25 requirements .62
12.2 X.25 procedures .62
12.2.1 Data link protocol supporting the X.25 packet level protocol .62
12.2.2 X.25 packet level protocol .62
12.2.3 Outgoing and incoming virtual calls.62
12.2.4 Identification of X.25 terminals .62
Annex A (normative): TBR Requirements Table (TBR-RT).63
A.1 Guidance for completion of the TBR-RT.63
A.2 General classification of requirements TBR-RT.64
A.3 Layer 1 and overvoltage requirements TBR-RT .66
A.4 Layer 2 TBR-RT .69
A.5 Layer 3 TBR-RT .72
Annex B (normative): Layer 1 tests .74
Annex C (normative): Layer 2 tests .75
C.1 The TTCN Graphical form (TTCN.GR) .75
C.2 The TTCN Machine Processable form (TTCN.MP) .75
An
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