SIST ETS 300 360:1997

Integrated Services Digital Network (ISDN); Signalling System No.7; Signalling interworking specification for ISDN User Part (ISUP) version 2

To specify the interworking between ISUP version 2 and previous signalling systems (eg ISUP version 1, CCITT No 5, R2, TUP, ...).

Digitalno omrežje z integriranimi storitvami (ISDN) - Signalizacija št. 7 - Specifikacija signalizacijskega vzajemnega delovanja druge različice ISDN-uporabniškega dela (ISUP)

General Information

• Status: Published
• Publication Date: 30-Apr-1997
• ICS: 33.080 - Integrated Services Digital Network (ISDN)
• Technical Committee: SPS - Signalling protocols and switching
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-May-1997
• Due Date: 01-May-1997
• Completion Date: 01-May-1997
• Ref Project: ETSI ETS 300 360 ed.1 (1995-02) - Integrated Services Digital Network (ISDN); Signalling System No.7; Signalling interworking specification for ISDN User Part (ISUP) version 2

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ETS 300 360:1997
01-maj-1997
'LJLWDOQRRPUHåMH]LQWHJULUDQLPLVWRULWYDPL,6'16LJQDOL]DFLMDãW
6SHFLILNDFLMDVLJQDOL]DFLMVNHJDY]DMHPQHJDGHORYDQMDGUXJHUD]OLþLFH,6'1
XSRUDEQLãNHJDGHOD,683
Integrated Services Digital Network (ISDN); Signalling System No.7; Signalling
interworking specification for ISDN User Part (ISUP) version 2
Ta slovenski standard je istoveten z: ETS 300 360 Edition 1
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
SIST ETS 300 360:1997 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 360:1997

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SIST ETS 300 360:1997
EUROPEAN ETS 300 360
TELECOMMUNICATION February 1995
STANDARD
Source: ETSI TC-SPS Reference: DE/SPS-6006
ICS: 33.080
ISDN, SS7, ISUP, interworking
Key words:
Integrated Services Digital Network (ISDN);
Signalling System No.7;
Signalling interworking specification
for ISDN User Part (ISUP) version 2
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 - [e-mail]
X.400: Internet:
Tel.: [phone] - Fax: [phone]
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 1995. All rights reserved.
New presentation - see History box

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SIST ETS 300 360:1997
Page 2
ETS 300 360: February 1995
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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SIST ETS 300 360:1997
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ETS 300 360: February 1995
Contents
Foreword.9
1 Scope .11
2 Normative references .11
3 Definitions, symbols and abbreviations .12
3.1 Definitions.12
3.2 Symbols.12
3.3 Abbreviations.12
4 General considerations .14
4.1 General.14
4.2 Working assumptions .14
5 Miscellaneous interworking aspects .15
5.1 Interworking handling of the echo control device indicator (or the incoming half echo
suppressor indicator) of the address complete message in ISUP (or TUP/TUP+).15
5.1.1 Interworking from ISUP to R2, No.5. 15
5.1.2 Interworking from ISUP to TUP/TUP+ .15
5.1.3 Interworking from TUP/TUP+ to ISUP .15
5.2 Handling of the called party's category and the charge indicator in case of interworking
TUP/TUP+ to ISUP.16
5.3 Transfer of no charge or charge information in the answer message in case of
interworking TUP/TUP+ to ISUP.16
5.4 Simple segmentation . 16
5.5 Handling an early ACM when interworking from TUP to ISUP.16
6 Interworking.17
6.1 Interworking from Signalling System ISUP to Signalling System No.5 .17
6.1.1 Forward direction. 17
6.1.1.1 Circuit seizure. 17
6.1.1.2 Address information sending sequence.17
6.1.1.3 Forward transfer .17
6.1.1.4 Call release and call failures.18
6.1.2 Backward direction. 18
6.1.2.1 Address complete.18
6.1.2.2 Answer .18
6.1.2.3 Clear-back/re-answer sequence .18
6.1.2.4 Call release and call failures.18
6.1.2.5 Fallback.19
6.1.2.6 Propagation delay.19
6.1.3 Considerations on supplementary services .19
6.1.3.1 Connected Line identification Presentation
(COLP)/Connected Line identification Restriction (COLR) . 19
6.1.3.2 Closed User Group (CUG) .19
6.1.3.3 User-to-User Signalling (UUS).19
6.1.3.3.1 UUS Service 1 (UUS1) implicit .19
6.1.3.3.2 UUS1 explicit, non-essential . 19
6.1.3.3.3 UUS Service 2 (UUS2) explicit,
non-essential.20
6.1.3.3.4 UUS Service 3 (UUS3) explicit,
non-essential, requested during call
set-up.20

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6.1.3.3.5 UUS3 explicit, non-essential,
requested after call set-up .20
6.2 Interworking from Signalling System ISUP to Signalling System R2 .20
6.2.1 Forward direction .20
6.2.1.1 Address information sending sequence.20
6.2.1.2 Language or discriminating digit .20
6.2.1.3 Calling party's category.20
6.2.1.4 Satellite.21
6.2.1.5 Continuity check.21
6.2.1.6 Echo control .21
6.2.1.7 Forward transfer.21
6.2.1.8 Call release and call failure.21
6.2.2 Backward direction.22
6.2.2.1 Address complete.22
6.2.2.2 Answer .22
6.2.2.3 Clear-back/re-answer sequence .22
6.2.2.4 Call release and call failures .22
6.2.2.5 Fallback.23
6.2.2.6 Propagation delay.23
6.2.3 Considerations on supplementary services .23
6.2.3.1 COLP/COLR .23
6.2.3.2 CUG.24
6.2.3.3 UUS.24
6.2.3.3.1 UUS1 implicit.24
6.2.3.3.2 UUS1 explicit, non-essential.24
6.2.3.3.3 UUS2 explicit, non-essential.24
6.2.3.3.4 UUS3 explicit, non-essential,
requested during call set-up .24
6.2.3.3.5 UUS3 explicit, non-essential,
requested after call set-up .24
6.3 Interworking from Signalling System ISUP to Signalling System TUP.24
6.3.1 Forward direction .24
6.3.1.1 Initial address message.24
6.3.1.1.1 Calling party's category.25
6.3.1.1.2 Message indicators .25
6.3.1.2 Continuity message.26
6.3.1.3 Forward transfer.26
6.3.1.4 Call release and call failures .26
6.3.2 Backward direction.26
6.3.2.1 General request message .26
6.3.2.1.1 Calling party category request.26
6.3.2.1.2 Calling line identity request .27
6.3.2.2 Address complete.27
6.3.2.3 Answer .27
6.3.2.4 Clear-back/re-answer sequence .28
6.3.2.5 Call release and call failures .28
6.3.2.6 Fallback.29
6.3.2.7 Propagation delay.29
6.3.3 Considerations on supplementary services .29
6.3.3.1 COLP/COLR .29
6.3.3.2 CUG.29
6.3.3.3 UUS.30
6.3.3.3.1 UUS1 implicit.30
6.3.3.3.2 UUS1 explicit, non-essential.30
6.3.3.3.3 UUS2 explicit, non-essential.30
6.3.3.3.4 UUS3 explicit, non-essential,
requested during call set-up .30
6.3.3.3.5 UUS3 explicit, non-essential,
requested after call set-up .30

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6.4 Interworking of Signalling System No.5 to Signalling System ISUP .30
6.4.1 Forward direction. 30
6.4.1.1 Initial address message .30
6.4.1.1.1 Called party number .30
6.4.1.1.2 Calling party's category . 31
6.4.1.1.3 Forward call indicators. 31
6.4.1.1.4 Nature of connection.31
6.4.1.1.5 Transmission medium requirement.32
6.4.1.1.6 Propagation delay .32
6.4.1.2 Forward transfer .32
6.4.1.3 Call release and call failures.32
6.4.2 Backward direction. 32
6.4.2.1 Address complete.32
6.4.2.2 Answer .32
6.4.2.3 Connect.32
6.4.2.4 Clear-back/re-answer sequence .32
6.4.2.5 Call release and call failures.32
6.4.3 Considerations on supplementary services .33
6.4.3.1 Malicious Call Identification (MCID).33
6.4.3.2 UUS3 explicit, non-essential, requested after call set-up .33
6.5 Interworking from Signalling System R2 to Signalling System ISUP.33
6.5.1 Forward direction. 33
6.5.1.1 Initial address message .33
6.5.1.1.1 Called party number .33
6.5.1.1.2 Calling party's category . 34
6.5.1.1.3 Forward call indicators. 34
6.5.1.1.4 Nature of connection.34
6.5.1.1.5 Transmission medium requirement.35
6.5.1.1.6 Propagation delay .35
6.5.1.2 Call release and call failures.35
6.5.2 Backward direction. 35
6.5.2.1 Address complete.35
6.5.2.2 Answer .35
6.5.2.3 Connect .35
6.5.2.4 Clear-back/re-answer sequence .36
6.5.2.5 Call release and call failures.36
6.5.3 Considerations on supplementary services .36
6.5.3.1 MCID.36
6.5.3.2 UUS3 explicit, non-essential, requested after call set-up .37
6.6 Interworking from Signalling System TUP to Signalling System ISUP.37
6.6.1 Forward direction. 37
6.6.1.1 Initial address message . 37
6.6.1.1.1 Called party number .37
6.6.1.1.2 Calling party's category . 37
6.6.1.1.3 Forward call indicators. 38
6.6.1.1.4 Nature of connection.38
6.6.1.1.5 Transmission medium requirement.38
6.6.1.1.6 Redirection information . 39
6.6.1.1.7 Propagation delay .39
6.6.1.2 Continuity message.39
6.6.1.3 Forward transfer .39
6.6.1.4 Call release and call failures.40
6.6.2 Backward direction. 40
6.6.2.1 Address complete.40
6.6.2.2 Answer .40
6.6.2.3 Connect .41
6.6.2.4 Clear-back/re-answer sequence .41
6.6.2.5 Call release and call failures.41
6.6.3 Considerations on supplementary services .42
6.6.3.1 MCID.42

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6.6.3.2 UUS3 explicit, non-essential, requested after call set-up .43
6.7 Interworking from Signalling System ISUP to Signalling System TUP+ .43
6.7.1 Forward direction .43
6.7.1.1 Initial address message with additional information.43
6.7.1.1.1 Calling party's category.43
6.7.1.1.2 Calling access signalling capability.43
6.7.1.1.3 Message indicators .43
6.7.1.1.4 First indicator octet.44
6.7.1.1.5 Closed user group information .44
6.7.1.1.6 Additional calling party information .44
6.7.1.1.7 Additional routeing information .45
6.7.1.1.8 Calling line identity.45
6.7.1.2 Continuity message.45
6.7.1.3 Forward transfer.45
6.7.1.4 Call release and call failures .45
6.7.2 Backward direction.46
6.7.2.1 General request message .46
6.7.2.1.1 Calling line identity request .46
6.7.2.2 Address complete.46
6.7.2.3 Answer .47
6.7.2.4 Clear-back/re-answer sequence .47
6.7.2.5 Call release and call failures .48
6.7.2.6 Fallback.48
6.7.2.7 Propagation delay.48
6.7.3 Considerations on supplementary services .49
6.7.3.1 UUS.49
6.7.3.1.1 UUS1 implicit.49
6.7.3.1.2 UUS1 explicit, non-essential.49
6.7.3.1.3 UUS2 explicit, non-essential.49
6.7.3.1.4 UUS3 explicit, non-essential,
requested during call set-up .49
6.7.3.1.5 UUS3 explicit, non-essential,
requested after call set-up .49
6.7.3.1.6 UUS2, explicit, essential.49
6.7.3.1.7 UUS3 explicit, essential, requested
during call set-up.49
6.7.3.2 CLIP/CLIR .49
6.7.3.3 CUG.51
6.7.3.4 COLP/COLR .51
6.7.3.5 Subaddressing.51
6.7.4 Coding of bearer capability and high layer compatibility .52
6.7.4.1 Bearer capability.52
6.7.4.2 High layer compatibility.52
6.8 Interworking of Signalling System TUP+ to Signalling System ISUP.52
6.8.1 Forward direction .52
6.8.1.1 Initial address message.52
6.8.1.1.1 Called party number .52
6.8.1.1.2 Calling party's category.52
6.8.1.1.3 Forward call indicators.53
6.8.1.1.4 Nature of connection.53
6.8.1.1.5 Transmission medium requirement .54
6.8.1.1.6 Access transport.54
6.8.1.1.7 Optional forward call indicators.54
6.8.1.1.8 Closed user group interlock code.54
6.8.1.1.9 User-to-user information.54
6.8.1.1.10 User service information.54
6.8.1.1.11 Redirection information .54
6.8.1.1.12 Propagation delay .55
6.8.1.2 Continuity message.55
6.8.1.3 Call release and call failures .55

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6.8.2 Backward direction. 56
6.8.2.1 Address complete.56
6.8.2.2 Answer .56
6.8.2.3 Connect .57
6.8.2.4 Clear-back/re-answer sequence .58
6.8.2.5 Call release and call failures.58
6.8.3 Considerations on supplementary services .59
6.8.3.1 UUS1 implicit.59
6.8.3.2 UUS3 explicit, non-essential, requested after call set-up .59
6.8.3.3 CLIP/CLIR .59
6.8.3.4 CUG.60
6.8.3.5 Subaddressing .61
6.8.3.6 MCID.61
6.8.4 Coding of bearer capability and high layer compatibility.61
6.8.4.1 Bearer capability . 61
6.8.4.2 High layer compatibility.61
Annex A (informative): Echo control procedure in case of interworking.62
A.1 Interworking from Signalling System No.5/R2 to ISUP.62
A.1.1 Forward direction.62
A.1.2 Backward direction. 63
A.2 Interworking from Signalling System ISUP to No.5/R2.64
A.3 Interworking from No.5/R2 to ISUP version 2.66
A.3.1 Closer located outgoing echo control device.66
A.3.2 Farther located outgoing echo control device.67
A.4 Interworking from ISUP version 2 to No.5/R2.68
A.4.1 Closer located incoming echo control device.68
A.4.2 Farther located incoming echo control device .69
History.70

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Foreword
This European Telecommunication Standard (ETS) has been produced by the Signalling Protocols and
Switching (SPS) Technical Committee of the European Telecommunications Standards Institute (ETSI).
This ETS specifies the interworking applicable to Signalling System No.7 Integrated Services Digital
Network (ISDN) User Part (ISUP) version 2.
Transposition dates
Date of latest announcement of this ETS (doa): 31 May 1995
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 30 November 1995
Date of withdrawal of any conflicting National Standard (dow): 30 November 1995

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1 Scope
This European Telecommunication Standard (ETS) specifies the interworking between the Signalling
System No.7 Integrated Services Digital Network (ISDN) User Part (ISUP) version 2 (as specified in
ETS 300 356-1 [2]) and the Signalling Systems No.5 (as specified in CCITT Recommendations Q.140 to
Q.164 [7]), R2 (as specified in CCITT Recommendations Q.400 to Q.490 [8]), Telephone User Part (TUP)
(as specified in CCITT Recommendations Q.721 to Q.725 [17]), and TUP+ (as specified in CEPT
Recommendation T/S 43-02 E [18]).
ISUP version 2 (as specified in ETS 300 356-1 [2]) has been designed to allow peer-to-peer operation to a
version 1 exchange (as specified in ETS 300 121 [1]) without requiring any knowledge of that situation.
This means that different ISUP versions (like version 1 and version 2) cannot be considered as different
signalling systems in an exchange. A specific interworking specification is not required, relevant information
is contained in ETS 300 356-1 [2].
This specification is applicable to international transit exchanges, but may be used as a basis for the
interworking in international gateway exchanges, because ISUP at the national side may also be based on
ISUP version 2.
2 Normative references
This ETS incorporates by dated and undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply
to this ETS only when incorporated in it by amendment or revision. For undated references the latest
edition of the publication referred to applies.
[1] ETS 300 121 (1992): "Integrated Services Digital Network (ISDN); Application of
the ISDN User Part (ISUP) of CCITT Signalling System No.7 for international
ISDN interconnections (ISUP version 1)".
[2] ETS 300 356-1 (1995): "Integrated Services Digital Network (ISDN); Signalling
System No.7; ISDN User Part (ISUP) version 2 for the international interface;
Part 1: Basic services [ITU-T Recommendations Q.761 to Q.764 (1993),
modified]".
[3] ETS 300 356-8 (1995): "Integrated Services Digital Network (ISDN); Signalling
System No.7; ISDN User Part (ISUP) version 2 for the international interface;
Part 8: User-to-User Signalling (UUS) supplementary service [ITU-T
Recommendation Q.737, clause 1 (1993), modified]".
[4] ETS 300 343 (1994): "Integrated Services Digital Network (ISDN); Signalling
System No.7; Signalling interworking specification for ISDN User Part (ISUP)
version 1".
[5] CCITT Recommendation Q.107 (1988): "Standard sending sequence of forward
address information".
[6] ITU-T Recommendation Q.115 (1993): "Control of echo suppressors and echo
cancellers by international switching centres".
[7] CCITT Recommendations Q.140 to Q.164 (1988): "Specifications of Signalling
System No.5".
[8] CCITT Recommendations Q.400 to Q.490 (1988): "Specifications of Signalling
System R2".
[9] ITU-T Recommendation Q.617 (1993): "Interworking of Signalling Systems -
Logic procedures for incoming Signalling System No.7".

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[10] ITU-T Recommendation Q.627 (1993): "Interworking of Signalling Systems -
Logic procedures for outgoing Signalling System No.7".
[11] ITU-T Recommendation Q.646 (1993): "Interworking of Signalling Systems -
Logic procedures for interworking of Signalling System No.5 to No.7 (ISUP)".
[12] ITU-T Recommendation Q.667 (1993): "Interworking of Signalling Systems -
Logic procedures for interworking of Signalling System No.7 (TUP) to No.7
(ISUP)".
[13] ITU-T Recommendation Q.686 (1993): "Interworking of Signalling Systems -
Logic procedures for interworking of Signalling System R2 to No.7 (ISUP)".
[14] ITU-T Recommendation Q.690 (1993): "Interworking of Signalling Systems -
Logic procedures for interworking of Signalling System No.7 (ISUP) to No.5".
[15] ITU-T Recommendation Q.692 (1993): "Interworking of Signalling Systems -
Logic procedures for interworking of Signalling System No.7 (ISUP) to No.7
(TUP)".
[16] ITU-T Recommendation Q.695 (1993): "Interworking of Signalling Systems -
Logic procedures for interworking of Signalling System No.7 (ISUP) to R2".
[17] CCITT Recommendations Q.721 to Q.725 (1988): "Specifications of the
Signalling System No.7 Telephone User Part (TUP)".
[18] CEPT Recommendation T/S 43-02 E (1988): "Signalling System Telephone User
Part "Plus" (TUP+)".
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of this ETS, the following definitions apply:
backward direction: Means interworking in opposite direction to the call set-up.
forward direction: Means interworking in the call set-u
...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Integrated Services Digital Network (ISDN); Signalling System No.7; Signalling interworking specification for ISDN User Part (ISUP) version 233.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:ETS 300 360 E13SIST ETS 300 360:1997en01jDQXDU-19973SIST ETS 300 360:1997SLOVENSKI
STANDARD



SIST ETS 300 360:1997



EUROPEANETS 300 360TELECOMMUNICATIONFebruary 1995STANDARDSource: ETSI TC-SPSReference: DE/SPS-6006ICS:33.080Key words:ISDN, SS7, ISUP, interworkingIntegrated Services Digital Network (ISDN);Signalling System No.7;Signalling interworking specificationfor ISDN User Part (ISUP) version 2ETSIEuropean Telecommunications Standards InstituteETSI SecretariatPostal address: F-06921 Sophia Antipolis CEDEX - FRANCEOffice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCEX.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [e-mail].: [phone] - Fax: [phone]Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and theforegoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1995. All rights reserved.SIST ETS 300 360:1997



Page 2ETS 300 360: February 1995Whilst 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.SIST ETS 300 360:1997



Page 3ETS 300 360: February 1995ContentsForeword.91Scope.112Normative references.113Definitions, symbols and abbreviations.123.1Definitions.123.2Symbols.123.3Abbreviations.124General considerations.144.1General.144.2Working assumptions.145Miscellaneous interworking aspects.155.1Interworking handling of the echo control device indicator (or the incoming half echosuppressor indicator) of the address complete message in ISUP (or TUP/TUP+).155.1.1Interworking from ISUP to R2, No.5.155.1.2Interworking from ISUP to TUP/TUP+.155.1.3Interworking from TUP/TUP+ to ISUP.155.2Handling of the called party's category and the charge indicator in case of interworkingTUP/TUP+ to ISUP.165.3Transfer of no charge or charge information in the answer message in case ofinterworking TUP/TUP+ to ISUP.165.4Simple segmentation.165.5Handling an early ACM when interworking from TUP to ISUP.166Interworking.176.1Interworking from Signalling System ISUP to Signalling System No.5.176.1.1Forward direction.176.1.1.1Circuit seizure.176.1.1.2Address information sending sequence.176.1.1.3Forward transfer.176.1.1.4Call release and call failures.186.1.2Backward direction.186.1.2.1Address complete.186.1.2.2Answer.186.1.2.3Clear-back/re-answer sequence.186.1.2.4Call release and call failures.186.1.2.5Fallback.196.1.2.6Propagation delay.196.1.3Considerations on supplementary services.196.1.3.1Connected Line identification Presentation(COLP)/Connected Line identification Restriction (COLR).196.1.3.2Closed User Group (CUG).196.1.3.3User-to-User Signalling (UUS).196.1.3.3.1UUS Service 1 (UUS1) implicit.196.1.3.3.2UUS1 explicit, non-essential.196.1.3.3.3UUS Service 2 (UUS2) explicit,non-essential.206.1.3.3.4UUS Service 3 (UUS3) explicit,non-essential, requested during callset-up.20SIST ETS 300 360:1997



Page 4ETS 300 360: February 19956.1.3.3.5UUS3 explicit, non-essential,requested after call set-up.206.2Interworking from Signalling System ISUP to Signalling System R2.206.2.1Forward direction.206.2.1.1Address information sending sequence.206.2.1.2Language or discriminating digit.206.2.1.3Calling party's category.206.2.1.4Satellite.216.2.1.5Continuity check.216.2.1.6Echo control.216.2.1.7Forward transfer.216.2.1.8Call release and call failure.216.2.2Backward direction.226.2.2.1Address complete.226.2.2.2Answer.226.2.2.3Clear-back/re-answer sequence.226.2.2.4Call release and call failures.226.2.2.5Fallback.236.2.2.6Propagation delay.236.2.3Considerations on supplementary services.236.2.3.1COLP/COLR.236.2.3.2CUG.246.2.3.3UUS.246.2.3.3.1UUS1 implicit.246.2.3.3.2UUS1 explicit, non-essential.246.2.3.3.3UUS2 explicit, non-essential.246.2.3.3.4UUS3 explicit, non-essential,requested during call set-up.246.2.3.3.5UUS3 explicit, non-essential,requested after call set-up.246.3Interworking from Signalling System ISUP to Signalling System TUP.246.3.1Forward direction.246.3.1.1Initial address message.246.3.1.1.1Calling party's category.256.3.1.1.2Message indicators.256.3.1.2Continuity message.266.3.1.3Forward transfer.266.3.1.4Call release and call failures.266.3.2Backward direction.266.3.2.1General request message.266.3.2.1.1Calling party category request.266.3.2.1.2Calling line identity request.276.3.2.2Address complete.276.3.2.3Answer.276.3.2.4Clear-back/re-answer sequence.286.3.2.5Call release and call failures.286.3.2.6Fallback.296.3.2.7Propagation delay.296.3.3Considerations on supplementary services.296.3.3.1COLP/COLR.296.3.3.2CUG.296.3.3.3UUS.306.3.3.3.1UUS1 implicit.306.3.3.3.2UUS1 explicit, non-essential.306.3.3.3.3UUS2 explicit, non-essential.306.3.3.3.4UUS3 explicit, non-essential,requested during call set-up.306.3.3.3.5UUS3 explicit, non-essential,requested after call set-up.30SIST ETS 300 360:1997



Page 5ETS 300 360: February 19956.4Interworking of Signalling System No.5 to Signalling System ISUP.306.4.1Forward direction.306.4.1.1Initial address message.306.4.1.1.1Called party number.306.4.1.1.2Calling party's category.316.4.1.1.3Forward call indicators.316.4.1.1.4Nature of connection.316.4.1.1.5Transmission medium requirement.326.4.1.1.6Propagation delay.326.4.1.2Forward transfer.326.4.1.3Call release and call failures.326.4.2Backward direction.326.4.2.1Address complete.326.4.2.2Answer.326.4.2.3Connect.326.4.2.4Clear-back/re-answer sequence.326.4.2.5Call release and call failures.326.4.3Considerations on supplementary services.336.4.3.1Malicious Call Identification (MCID).336.4.3.2UUS3 explicit, non-essential, requested after call set-up.336.5Interworking from Signalling System R2 to Signalling System ISUP.336.5.1Forward direction.336.5.1.1Initial address message.336.5.1.1.1Called party number.336.5.1.1.2Calling party's category.346.5.1.1.3Forward call indicators.346.5.1.1.4Nature of connection.346.5.1.1.5Transmission medium requirement.356.5.1.1.6Propagation delay.356.5.1.2Call release and call failures.356.5.2Backward direction.356.5.2.1Address complete.356.5.2.2Answer.356.5.2.3Connect.356.5.2.4Clear-back/re-answer sequence.366.5.2.5Call release and call failures.366.5.3Considerations on supplementary services.366.5.3.1MCID.366.5.3.2UUS3 explicit, non-essential, requested after call set-up.376.6Interworking from Signalling System TUP to Signalling System ISUP.376.6.1Forward direction.376.6.1.1Initial address message.376.6.1.1.1Called party number.376.6.1.1.2Calling party's category.376.6.1.1.3Forward call indicators.386.6.1.1.4Nature of connection.386.6.1.1.5Transmission medium requirement.386.6.1.1.6Redirection information.396.6.1.1.7Propagation delay.396.6.1.2Continuity message.396.6.1.3Forward transfer.396.6.1.4Call release and call failures.406.6.2Backward direction.406.6.2.1Address complete.406.6.2.2Answer.406.6.2.3Connect.416.6.2.4Clear-back/re-answer sequence.416.6.2.5Call release and call failures.416.6.3Considerations on supplementary services.426.6.3.1MCID.42SIST ETS 300 360:1997



Page 6ETS 300 360: February 19956.6.3.2UUS3 explicit, non-essential, requested after call set-up.436.7Interworking from Signalling System ISUP to Signalling System TUP+.436.7.1Forward direction.436.7.1.1Initial address message with additional information.436.7.1.1.1Calling party's category.436.7.1.1.2Calling access signalling capability.436.7.1.1.3Message indicators.436.7.1.1.4First indicator octet.446.7.1.1.5Closed user group information.446.7.1.1.6Additional calling party information.446.7.1.1.7Additional routeing information.456.7.1.1.8Calling line identity.456.7.1.2Continuity message.456.7.1.3Forward transfer.456.7.1.4Call release and call failures.456.7.2Backward direction.466.7.2.1General request message.466.7.2.1.1Calling line identity request.466.7.2.2Address complete.466.7.2.3Answer.476.7.2.4Clear-back/re-answer sequence.476.7.2.5Call release and call failures.486.7.2.6Fallback.486.7.2.7Propagation delay.486.7.3Considerations on supplementary services.496.7.3.1UUS.496.7.3.1.1UUS1 implicit.496.7.3.1.2UUS1 explicit, non-essential.496.7.3.1.3UUS2 explicit, non-essential.496.7.3.1.4UUS3 explicit, non-essential,requested during call set-up.496.7.3.1.5UUS3 explicit, non-essential,requested after call set-up.496.7.3.1.6UUS2, explicit, essential.496.7.3.1.7UUS3 explicit, essential, requestedduring call set-up.496.7.3.2CLIP/CLIR.496.7.3.3CUG.516.7.3.4COLP/COLR.516.7.3.5Subaddressing.516.7.4Coding of bearer capability and high layer compatibility.526.7.4.1Bearer capability.526.7.4.2High layer compatibility.526.8Interworking of Signalling System TUP+ to Signalling System ISUP.526.8.1Forward direction.526.8.1.1Initial address message.526.8.1.1.1Called party number.526.8.1.1.2Calling party's category.526.8.1.1.3Forward call indicators.536.8.1.1.4Nature of connection.536.8.1.1.5Transmission medium requirement.546.8.1.1.6Access transport.546.8.1.1.7Optional forward call indicators.546.8.1.1.8Closed user group interlock code.546.8.1.1.9User-to-user information.546.8.1.1.10User service information.546.8.1.1.11Redirection information.546.8.1.1.12Propagation delay.556.8.1.2Continuity message.556.8.1.3Call release and call failures.55SIST ETS 300 360:1997



Page 7ETS 300 360: February 19956.8.2Backward direction.566.8.2.1Address complete.566.8.2.2Answer.566.8.2.3Connect.576.8.2.4Clear-back/re-answer sequence.586.8.2.5Call release and call failures.586.8.3Considerations on supplementary services.596.8.3.1UUS1 implicit.596.8.3.2UUS3 explicit, non-essential, requested after call set-up.596.8.3.3CLIP/CLIR.596.8.3.4CUG.606.8.3.5Subaddressing.616.8.3.6MCID.616.8.4Coding of bearer capability and high layer compatibility.616.8.4.1Bearer capability.616.8.4.2High layer compatibility.61Annex A (informative):Echo control procedure in case of interworking.62A.1Interworking from Signalling System No.5/R2 to ISUP.62A.1.1Forward direction.62A.1.2Backward direction.63A.2Interworking from Signalling System ISUP to No.5/R2.64A.3Interworking from No.5/R2 to ISUP version 2.66A.3.1Closer located outgoing echo control device.66A.3.2Farther located outgoing echo control device.67A.4Interworking from ISUP version 2 to No.5/R2.68A.4.1Closer located incoming echo control device.68A.4.2Farther located incoming echo control device.69History.70SIST ETS 300 360:1997



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Page 9ETS 300 360: February 1995ForewordThis European Telecommunication Standard (ETS) has been produced by the Signalling Protocols andSwitching (SPS) Technical Committee of the European Telecommunications Standards Institute (ETSI).This ETS specifies the interworking applicable to Signalling System No.7 Integrated Services DigitalNetwork (ISDN) User Part (ISUP) version 2.Transposition datesDate of latest announcement of this ETS (doa):31 May 1995Date of latest publication of new National Standardor endorsement of this ETS (dop/e):30 November 1995Date of withdrawal of any conflicting National Standard (dow):30 November 1995SIST ETS 300 360:1997



Page 10ETS 300 360: February 1995Blank pageSIST ETS 300 360:1997



Page 11ETS 300 360: February 19951ScopeThis European Telecommunication Standard (ETS) specifies the interworking between the SignallingSystem No.7 Integrated Services Digital Network (ISDN) User Part (ISUP) version 2 (as specified inETS 300 356-1 [2]) and the Signalling Systems No.5 (as specified in CCITT Recommendations Q.140 toQ.164 [7]), R2 (as specified in CCITT Recommendations Q.400 to Q.490 [8]), Telephone User Part (TUP)(as specified in CCITT Recommendations Q.721 to Q.725 [17]), and TUP+ (as specified in CEPTRecommendation T/S 43-02 E [18]).ISUP version 2 (as specified in ETS 300 356-1 [2]) has been designed to allow peer-to-peer operation to aversion 1 exchange (as specified in ETS 300 121 [1]) without requiring any knowledge of that situation.This means that different ISUP versions (like version 1 and version 2) cannot be considered as differentsignalling systems in an exchange. A specific interworking specification is not required, relevant informationis contained in ETS 300 356-1 [2].This specification is applicable to international transit exchanges, but may be used as a basis for theinterworking in international gateway exchanges, because ISUP at the national side may also be based onISUP version 2.2Normative referencesThis ETS incorporates by dated and undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listedhereafter. For dated references, subsequent amendments to or revisions of any of these publications applyto this ETS only when incorporated in it by amendment or revision. For undated references the latestedition of the publication referred to applies.[1]ETS 300 121 (1992): "Integrated Services Digital Network (ISDN); Application ofthe ISDN User Part (ISUP) of CCITT Signalling System No.7 for internationalISDN interconnections (ISUP version 1)".[2]ETS 300 356-1 (1995): "Integrated Services Digital Network (ISDN); SignallingSystem No.7; ISDN User Part (ISUP) version 2 for the international interface;Part 1: Basic services [ITU-T Recommendations Q.761 to Q.764 (1993),modified]".[3]ETS 300 356-8 (1995): "Integrated Services Digital Network (ISDN); SignallingSystem No.7; ISDN User Part (ISUP) version 2 for the international interface;Part 8: User-to-User Signalling (UUS) supplementary service [ITU-TRecommendation Q.737, clause 1 (1993), modified]".[4]ETS 300 343 (1994): "Integrated Services Digital Network (ISDN); SignallingSystem No.7; Signalling interworking specification for ISDN User Part (ISUP)version 1".[5]CCITT Recommendation Q.107 (1988): "Standard sending sequence of forwardaddress information".[6]ITU-T Recommendation Q.115 (1993): "Control of echo suppressors and echocancellers by international switching centres".[7]CCITT Recommendations Q.140 to Q.164 (1988): "Specifications of SignallingSystem No.5".[8]CCITT Recommendations Q.400 to Q.490 (1988): "Specifications of SignallingSystem R2".[9]ITU-T Recommendation Q.617 (1993): "Interworking of Signalling Systems -Logic procedures for incoming Signalling System No.7".SIST ETS 300 360:1997



Page 12ETS 300 360: February 1995[10]ITU-T Recommendation Q.627 (1993): "Interworking of Signalling Systems -Logic procedures for outgoing Signalling System No.7".[11]ITU-T Recommendation Q.646 (1993): "Interworking of Signalling Systems -Logic procedures for interworking of Signalling System No.5 to No.7 (ISUP)".[12]ITU-T Recommendation Q.667 (1993): "Interworking of Signalling Systems -Logic procedures for interworking of Signalling System No.7 (TUP) to No.7(ISUP)".[13]ITU-T Recommendation Q.686 (1993): "Interworking of Signalling Systems -Logic procedures for interworking of Signalling System R2 to No.7 (ISUP)".[14]ITU-T Recommendation Q.690 (1993): "Interworking of Signalling Systems -Logic procedures for interworking of Signalling System No.7 (ISUP) to No.5".[15]ITU-T Recommendation Q.692 (1993): "Interworking of Signalling Systems -Logic procedures for interworking of Signalling System No.7 (ISUP) to No.7(TUP)".[16]ITU-T Recommendation Q.695 (1993): "Interworking of Signalling Systems -Logic procedures for interworking of Signalling System No.7 (ISUP) to R2".[17]CCITT Recommendations Q.721 to Q.725 (1988): "Specifications of theSignalling System No.7 Telephone User Part (TUP)".[18]CEPT Recommendation T/S 43-02 E (1988): "Signalling System Telephone UserPart "Plus" (TUP+)".3Definitions, symbols and abbreviations3.1DefinitionsFor the purposes of this ETS, the following definitions apply:backward direction: Means interworking in opposite direction to the call set-up.forward direction: Means interworking in the call set-up direction."interworking from Signalling System X to Signalling System Y": Describes the signalling interworkingfor traffic which is routed (in call set-up direction) from an incoming Signalling System X trunk-group to anoutgoing Signalling System Y trunk-group.3.2SymbolsFor the purposes of this ETS, the following symbols apply:<>"else", i.e. all other values3.3AbbreviationsFor the purposes of this ETS, the following abbreviations apply:ACBAccess Barred signalACMAddress Complete MessageADCAddress complete, ChargeSIST ETS 300 360:1997



Page 13ETS 300 360: February 1995ADIAddress Incomplete signalADNAddress complete, No chargeADXAddress complete, coin boxAFCAddress complete, subscriber Free, ChargeAFNAddress complete, subscriber Free, No chargeAFXAddress complete, subscriber Free, coin boxANCAnswer signal, ChargeANMAnswer MessageANNAnswer signal, No chargeBCBearer CapabilityCBKClear-Back signalCCFContinuity-failure signalCFLCall-failure signalCGBCircuit Group Blocking messageCGB(H)Circuit Group Blocking (Hardware) messageCGCCircuit Group Congestion signalCLFClear-Forward signalCLIPCalling Line Identification PresentationCLIRCalling Line Identification RestrictionCOLPConnected Line identification PresentationCOLRConnected Line identification RestrictionCONConnect messageCUGClosed User GroupDPNDigital Path Not provided signalEUMExtended Unsuccessful backward set-up Message indicationf1frequency 1f2frequency 2FRJFacility Reject messageGRQGeneral Request messageGRScircuit Group Reset messageGSMGeneral forward Set-up information MessageHGBHardware failure oriented Group Blocking messageHLCHigh Layer CompatibilityIAIInitial Address message with additional InformationIAMInitial Address MessageIHECDIncoming Half Echo Control DeviceISDNIntegrated Services Di
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