SIST ETS 300 392-4-2 E1:2003

SLOVENSKI STANDARD
01-december-2003
Prizemni snopovni radio (TETRA) – Govor in podatki (V+D) – 4. del: Osnovna
operacija pri prehodu – 2. poglavje: Prehod pri digitalnem omrežju z integriranimi
storitvami (ISDN)
Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 4: Gateways basic
operation; Sub-part 2: Integrated Services Digital Network (ISDN) gateway
Ta slovenski standard je istoveten z: ETS 300 392-4-2 Edition 1
ICS:
33.070.10 Prizemni snopovni radio Terrestrial Trunked Radio
(TETRA) (TETRA)
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN ETS 300 392-4-2
TELECOMMUNICATION August 2000
STANDARD
Source: TETRA Reference: DE/TETRA-03001-04-2
ICS: 33.020
Key words: ISDN, radio, TETRA, V+D
Terrestrial Trunked Radio (TETRA);
VoiceplusData (V+D);
Part 4: Gateways basic operation;
Sub-part 2: Integrated Services Digital Network (ISDN) gateway
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
Internet: secretariat@etsi.fr - http://www.etsi.org
Tel.:+334 92944200- Fax:+334 93 654716
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 2000. All rights reserved.

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ETS 300 392-4-2: August 2000
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 Standards Making Support Dept." at the address shown on the title page.

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Contents
Foreword.11
1 Scope .13
2 Normative references.14
3 Definitions and abbreviations .16
3.1 Definitions .16
3.2 Abbreviations .16
4 ISDN gateway stage 1 specification.17
4.1 Description .17
4.1.1 General description .17
4.1.2 Qualifications on applicability to telecommunication services.17
4.2 Procedures.17
4.2.1 Provision/withdrawal.17
4.2.2 Normal procedures.17
4.2.2.1 Activation/deactivation/registration/interrogation.17
4.2.2.2 Invocation and operation .18
4.2.2.2.1 Maintenance of the TETRA call.18
4.2.2.2.2 Termination of the TETRA call.18
4.2.3 Exceptional procedures.18
4.2.3.1 Activation/deactivation/registration/interrogation.18
4.2.3.2 Invocation and operation .18
4.3 Interaction with TETRA supplementary services.19
4.3.1 Calling Line Identification Presentation (SS-CLIP) .19
4.3.1.1 Incoming call set-up at ISDN gateway .19
4.3.1.2 Outgoing call set-up at ISDN gateway .19
4.3.1.3 Call maintenance phase .19
4.3.2 Connected Line Identification Presentation (SS-COLP) .19
4.3.2.1 Incoming call set-up at ISDN gateway .19
4.3.2.2 Outgoing call set-up at ISDN gateway .19
4.3.2.3 Call maintenance phase .20
4.3.3 Calling Line Identification Restriction (SS-CLIR) .20
4.3.3.1 Incoming call set-up at ISDN gateway .20
4.3.3.2 Outgoing call set-up at ISDN gateway .20
4.3.3.3 Call maintenance phase .20
4.3.4 Connected Line Identification Restriction(SS-COLR) .20
4.3.4.1 Incoming call set-up at ISDN gateway .20
4.3.4.2 Outgoing call set-up at ISDN gateway .20
4.3.4.3 Call maintenance phase .20
4.3.5 Call Report (SS-CR).20
4.3.5.1 Incoming call set-up at ISDN gateway .20
4.3.5.2 Outgoing call set-up at ISDN gateway .20
4.3.5.3 Call maintenance phase .21
4.3.6 Talking Party Identification (SS-TPI).21
4.3.6.1 Incoming call set-up at ISDN gateway .21
4.3.6.2 Outgoing call set-up at ISDN gateway .21
4.3.6.3 Call maintenance phase .21
4.3.7 Call Forwarding Unconditional (SS-CFU) .21
4.3.7.1 Incoming call set-up at ISDN gateway .21
4.3.7.2 Outgoing call set-up at ISDN gateway .21
4.3.7.2.1 ISDN subscriber number dialled:.21
4.3.7.2.2 TETRA identity dialled: .21
4.3.7.3 Call maintenance phase .21
4.3.8 Call Forwarding on Busy (SS-CFB) .22

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4.3.8.1 Incoming call set-up at ISDN gateway. 22
4.3.8.2 Outgoing call set-up at ISDN gateway. 22
4.3.8.2.1 ISDN subscriber number dialled . 22
4.3.8.2.2 TETRA identity dialled. 22
4.3.8.3 Call maintenance phase . 22
4.3.9 Call Forwarding on No Reply (SS-CFNRy) . 22
4.3.9.1 Incoming call set-up at ISDN gateway. 22
4.3.9.1.1 Individual calls. 22
4.3.9.1.2 Group calls . 22
4.3.9.2 Outgoing call set-up at ISDN gateway. 22
4.3.9.2.1 ISDN subscriber number dialled . 22
4.3.9.2.2 TETRA identity dialled. 22
4.3.9.3 Call maintenance phase . 23
4.3.10 Call Forwarding on Not Reachable (SS-CFNRc) . 23
4.3.10.1 Incoming call set-up at ISDN gateway. 23
4.3.10.1.1 Individual calls. 23
4.3.10.1.2 Group calls . 23
4.3.10.2 Outgoing call set-up at ISDN gateway. 23
4.3.10.2.1 ISDN subscriber number dialled . 23
4.3.10.2.2 TETRA identity dialled. 23
4.3.10.3 Call maintenance phase . 23
4.3.11 List Search Call (SS-LSC) . 23
4.3.11.1 Incoming call set-up at ISDN gateway. 23
4.3.11.2 Outgoing call set-up at ISDN gateway. 23
4.3.11.3 Call maintenance phase . 24
4.3.12 Call Authorized by Dispatcher (SS-CAD) . 24
4.3.12.1 Incoming call set-up at ISDN gateway. 24
4.3.12.2 Outgoing call set-up at ISDN gateway. 24
4.3.12.3 Call maintenance phase . 24
4.3.13 Short Number Addressing (SS-SNA) . 24
4.3.13.1 Incoming call set-up at ISDN gateway. 24
4.3.13.2 Outgoing call set-up at ISDN gateway. 24
4.3.13.3 Call maintenance phase . 24
4.3.14 Area Selection (SS-AS) . 25
4.3.14.1 Incoming call set-up at ISDN gateway. 25
4.3.14.2 Outgoing call set-up at ISDN gateway. 25
4.3.14.3 Call maintenance phase . 25
4.3.15 Access Priority (SS-AP). 25
4.3.15.1 Incoming call set-up at ISDN gateway. 25
4.3.15.2 Outgoing call set-up at ISDN gateway. 25
4.3.15.3 Call maintenance phase . 25
4.3.16 Priority Call (SS-PC). 26
4.3.16.1 Incoming call set-up at ISDN gateway. 26
4.3.16.2 Outgoing call set-up at ISDN gateway. 26
4.3.16.3 Call maintenance phase . 26
4.3.17 Call Waiting (SS-CW) . 26
4.3.17.1 Incoming call set-up at ISDN gateway. 26
4.3.17.2 Outgoing call set-up at ISDN gateway. 26
4.3.17.3 Call maintenance phase . 26
4.3.18 Call Hold (SS-HOLD). 26
4.3.18.1 Incoming call set-up at ISDN gateway. 26
4.3.18.2 Outgoing call set-up at ISDN gateway. 27
4.3.18.3 Call maintenance phase . 27
4.3.19 Call Completion to Busy Subscriber (SS-CCBS) . 27
4.3.19.1 Incoming call set-up at ISDN gateway. 27
4.3.19.2 Outgoing call set-up at ISDN gateway. 27
4.3.19.3 Call maintenance phase . 27
4.3.20 Late Entry (SS-LE). 27
4.3.20.1 Incoming call set-up at ISDN gateway. 27
4.3.20.2 Outgoing call set-up at ISDN gateway. 27
4.3.20.3 Call maintenance phase . 27
4.3.21 Transfer of Control (SS-TC). 27
4.3.21.1 Incoming call set-up at ISDN gateway. 27

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4.3.21.2 Outgoing call set-up at ISDN gateway .28
4.3.21.3 Call maintenance phase .28
4.3.22 Pre-emptive Priority Call (SS-PPC).28
4.3.22.1 Incoming call set-up at ISDN gateway .28
4.3.22.2 Outgoing call set-up at ISDN gateway .28
4.3.22.3 Call maintenance phase .28
4.3.23 Include Call (SS-IC).28
4.3.23.1 Incoming call set-up at ISDN gateway .28
4.3.23.2 Outgoing call set-up at ISDN gateway .28
4.3.23.3 Call maintenance phase .29
4.3.24 Advice of Charge (SS-AoC) .29
4.3.24.1 Incoming call set-up at ISDN gateway .29
4.3.24.2 Outgoing call set-up at ISDN gateway .29
4.3.24.3 Call maintenance phase .29
4.3.25 Barring of Outgoing Calls (SS-BOC).29
4.3.25.1 Incoming call set-up at ISDN gateway .29
4.3.25.2 Outgoing call set-up at ISDN gateway .29
4.3.25.3 Call maintenance phase .29
4.3.26 Barring of Incoming Calls (SS-BIC).29
4.3.26.1 Incoming call set-up at ISDN gateway .29
4.3.26.2 Outgoing call set-up at ISDN gateway .29
4.3.26.3 Call maintenance phase .30
4.3.27 Discreet Listening (SS-DL).30
4.3.27.1 Incoming call set-up at ISDN gateway .30
4.3.27.2 Outgoing call set-up at ISDN gateway .30
4.3.27.3 Call maintenance phase .30
4.3.28 Ambience Listening (SS-AL) .30
4.3.29 Dynamic Group Number Assignment (SS-DGNA).30
4.3.29.1 Incoming call set-up at ISDN gateway .30
4.3.29.2 Outgoing call set-up at ISDN gateway .30
4.3.29.3 Call maintenance phase .30
4.3.30 Call Completion on No Reply (SS-CCNR) .31
4.3.30.1 Incoming call set-up at ISDN gateway .31
4.3.30.2 Outgoing call set-up at ISDN gateway .31
4.3.30.3 Call maintenance phase .31
4.3.31 Call Retention (SS-CRT).31
4.3.31.1 Incoming call set-up at ISDN gateway .31
4.3.31.2 Outgoing call set-up at ISDN gateway .31
4.3.31.3 Call maintenance phase .31
4.4 Interactions with ISDN supplementary services .31
4.4.1 Three-Party (3PTY) .31
4.4.1.1 Incoming call set-up at ISDN gateway .31
4.4.1.2 Outgoing call set-up at ISDN gateway .32
4.4.1.3 Call maintenance phase .32
4.4.2 Advice of Charge (SS-AoC) .32
4.4.3 Call Completion to Busy Subscriber (CCBS) .32
4.4.3.1 Incoming call set-up at ISDN gateway .32
4.4.3.2 Outgoing call set-up at ISDN gateway .32
4.4.3.3 Call maintenance phase .32
4.4.4 Call Completion on No Reply (CCNR) .32
4.4.4.1 Incoming call set-up at ISDN gateway .32
4.4.4.2 Outgoing call set-up at ISDN gateway .33
4.4.4.3 Call maintenance phase .33
4.4.5 Call Deflection (CD).33
4.4.5.1 Incoming call set-up at ISDN gateway .33
4.4.5.2 Outgoing call set-up at ISDN gateway .33
4.4.5.3 Call maintenance phase .33
4.4.6 Call Forwarding Busy (CFB) .33
4.4.6.1 Incoming call set-up at ISDN gateway .33
4.4.6.2 Outgoing call set-up at ISDN gateway .33
4.4.6.3 Call maintenance phase .33
4.4.7 Call Forwarding on No Reply (CFNR).33
4.4.7.1 Incoming call set-up at ISDN gateway .33

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4.4.7.2 Outgoing call set-up at ISDN gateway. 34
4.4.8 Call Forwarding Unconditional (CFU). 34
4.4.8.1 Incoming call set-up at ISDN gateway. 34
4.4.8.2 Outgoing call set-up at ISDN gateway. 34
4.4.8.3 Call maintenance phase . 34
4.4.9 Calling Line Identification Presentation (CLIP). 34
4.4.9.1 Incoming call set-up at ISDN gateway. 34
4.4.9.2 Outgoing call set-up at ISDN gateway. 34
4.4.9.3 Call maintenance phase . 35
4.4.10 Calling Line Identification Restriction (CLIR). 35
4.4.10.1 Incoming call set-up at ISDN gateway. 35
4.4.10.2 Outgoing call set-up at ISDN gateway. 35
4.4.10.3 Call maintenance phase . 35
4.4.11 Connected Line Identification Presentation (COLP). 35
4.4.11.1 Incoming call set-up at ISDN gateway. 35
4.4.11.2 Outgoing call set-up at ISDN gateway. 36
4.4.11.3 Call maintenance phase . 36
4.4.12 Connected Line Identification Restriction (COLR). 36
4.4.12.1 Incoming call set-up at ISDN gateway. 36
4.4.12.2 Outgoing call set-up at ISDN gateway. 36
4.4.12.3 Call maintenance phase . 36
4.4.13 Conference call, add on (CONF) . 36
4.4.13.1 Incoming call set-up at ISDN gateway. 36
4.4.13.2 Outgoing call set-up at ISDN gateway. 36
4.4.13.3 Call maintenance phase . 36
4.4.14 Closed User Group (CUG). 37
4.4.15 Call Waiting (CW) . 37
4.4.15.1 Incoming call set-up at ISDN gateway. 37
4.4.15.2 Outgoing call set-up at ISDN gateway. 37
4.4.15.3 Call maintenance phase . 37
4.4.16 Direct Dial In (DDI). 37
4.4.16.1 Incoming call set-up at ISDN gateway. 37
4.4.16.2 Outgoing call set-up at ISDN gateway. 37
4.4.16.3 Call maintenance phase . 37
4.4.17 Explicit Call Transfer (ECT) . 38
4.4.18 Freephone (FPH). 38
4.4.18.1 Incoming call set-up at ISDN gateway. 38
4.4.18.2 Outgoing call set-up at ISDN gateway. 38
4.4.18.3 Call maintenance phase . 38
4.4.19 Call Hold (HOLD). 38
4.4.19.1 Incoming call set-up at ISDN gateway. 38
4.4.19.2 Outgoing call set-up at ISDN gateway. 38
4.4.19.3 Call maintenance phase . 38
4.4.20 Malicious Call Identification (MCID). 39
4.4.21 Multiple Subscriber Number (MSN). 39
4.4.21.1 Incoming call set-up at ISDN gateway. 39
4.4.21.2 Outgoing call set-up at ISDN gateway. 39
4.4.21.3 Call maintenance phase . 39
4.4.22 Message Waiting Indication (MWI). 39
4.4.23 Outgoing Call Barring (OCB) . 39
4.4.23.1 Incoming call set-up at ISDN gateway. 39
4.4.23.2 Outgoing call set-up at ISDN gateway. 39
4.4.23.3 Call maintenance phase . 39
4.4.24 Subaddressing (SUB). 40
4.4.24.1 Incoming call set-up at ISDN gateway. 40
4.4.24.2 Outgoing call set-up at ISDN gateway. 40
4.4.24.3 Call maintenance phase . 40
4.4.25 Terminal Portability (TP). 40
4.4.25.1 Incoming call set-up at ISDN gateway. 40
4.4.25.2 Outgoing call set-up at ISDN gateway. 40
4.4.25.3 Call maintenance phase . 40
4.4.26 User-to-User signalling (UUS) . 40
4.4.26.1 Incoming call set-up at ISDN gateway. 40

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4.4.26.2 Outgoing call set-up at ISDN gateway .40
4.4.26.3 Call maintenance phase .40
4.5 Interworking considerations .40
4.6 ISDN gateway service description.41
4.6.1 ISDN gateway service.41
4.6.1.1 ISDN gateway primitives exchanged through the
ISDNCC-SAP.41
4.6.1.2 Service primitives at the ISDNCC-SAP .41
4.6.1.3 Service primitive description.42
4.6.1.3.1 ISDNCC-ALERTING primitive .42
4.6.1.3.2 ISDNCC-COMPLETE primitive.42
4.6.1.3.3 ISDNCC-RELEASE primitive.42
4.6.1.3.4 ISDNCC-SETUP primitive .43
4.6.1.3.5 ISDNCC-TX primitive.43
4.6.1.4 Parameter descriptions.44
4.6.1.5 Overall SDL .45
4.6.1.6 Static description of ISDN gateway attributes .49
5 TETRA gateway stage 2 specification .50
5.1 Functional model.50
5.1.1 Functional model description.50
5.1.2 Description of functional entities .51
5.1.2.1 SwMI call control application functional entity, FE1 .51
5.1.2.2 ISDN interface functional entity, FE2.51
5.1.2.3 ISDN network, FE3.51
5.2 Information flow.51
5.2.1 Information flow diagrams .51
5.2.1.1 Successful call set-up to an ISDN subscriber .52
5.2.1.2 Successful call set-up from an ISDN subscriber over the
ISDN gateway.54
5.2.1.3 Call set-up request from an ISDN subscriber queued.57
5.2.1.4 Unsuccessful call set-up to an ISDN subscriber .58
5.2.1.5 Unsuccessful call set-up from an ISDN subscriber .60
5.2.1.6 Unsuccessful call set-up, B-channel not accepted.62
5.2.1.7 Call maintenance procedures - Transmission control
towards an ISDN subscriber.63
5.2.1.8 Call maintenance procedures - Interrupt of transmitting
ISDN subscriber.64
5.2.1.9 Call maintenance procedures - Withdrawal of
transmission in the gateway SwMI .64
5.2.1.10 Call disconnection procedures - Request to disconnect
from a TETRA user or TETRA SwMI.65
5.2.1.11 Call disconnection procedures - Request to disconnect
from the ISDN network .66
5.3 Functional Entity Actions (FEAs) .66
5.3.1 Functional entity actions of FE2 .66
6 ISDN gateway stage 3 specification.68
6.1 Protocol structure and protocol stack .68
6.2 TETRA gateway coding requirements.68
6.2.1 Non end-to-end ISDN calls.69
6.2.1.1 Alert tone .69
6.2.1.2 Busy tone.69
6.2.1.3 Disconnect tone.69
6.2.1.4 Invalid number tone .69
6.2.2 Two stage dialling.69
6.2.2.1 Dialling Tone.69
6.2.2.2 Dialling .69
6.2.2.3 Call set-up tones sent in-band.69
6.2.3 Call set-up queuing .70
6.2.3.1 TETRA queuing tone .70
6.2.4 Transmission signalling.70
6.2.4.1 User-to-User Signalling .70

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6.2.4.2 DTMF signalling . 70
6.2.4.3 Guidance tones. 70
6.2.4.3.1 TX-ceased tone. 70
6.2.4.3.2 TX-granted tone . 70
6.2.4.3.3 TX-interrupt tone . 70
6.2.5 DTMF signalling during ACTIVE state. 71
6.2.5.1 From ISDN network . 71
6.2.5.2 From TETRA network . 71
6.3 TETRA gateway state definitions . 71
6.4 TETRA gateway signalling procedures. 71
6.4.1 Call set-up procedures. 71
6.4.1.1 Incoming calls . 71
6.4.1.1.1 Two stage dialling . 72
6.4.1.1.2 Acknowledged group calls . 72
6.4.1.1.3 Broadcast calls. 72
6.4.1.1.4 Call priority . 72
6.4.1.2 Outgoing calls . 72
6.4.1.2.1 Two stage dialling . 72
6.4.1.2.2 Acknowledged group calls . 73
6.4.1.2.3 Broadcast calls. 73
6.4.1.3 Colliding calls . 73
6.4.1.4 Unsuccessful call set-up . 73
6.4.2 Call maintenance procedures. 73
6.4.2.1 Transmission request. 74
6.4.2.1.1 Voice activity detection. 74
6.4.2.1.2 User-to-user signalling . 74
6.4.2.1.3 DTMF signalling . 75
6.4.2.2 Transmission request response. 75
6.4.2.2.1 Voice activity detection. 75
6.4.2.2.2 User-to-user signalling . 75
6.4.2.2.3 DTMF signalling . 75
6.4.2.3 End of transmission . 76
6.4.2.3.1 Voice activity detection. 76
6.4.2.3.2 User-to-user signalling . 76
6.4.2.3.3 DTMF signalling . 76
6.4.2.4 Interruption of transmission. 76
6.4.2.4.1 Voice activity detection. 76
6.4.2.4.2 User-to-user signalling . 76
6.4.2.4.3 DTMF signalling . 76
6.4.3 Call disconnection procedures . 77
6.4.3.1 Disconnect initiated by TETRA user or TETRA SwMI. 77
6.4.3.2 Disconnection initiated by ISDN subscriber. 77
6.4.3.3 Colliding disconnection . 77
6.5 Protocol interaction between TETRA gateway and TETRA supplementary services . 77
6.6 Protocol interaction between TETRA gateway and ISDN supplementary services. 77
6.7 TETRA gateway parameter values (timers). 77
Annex A (normative): Specification and description Language (SDL) representation of procedures . 78
A.1 SDL representation of ISDN interface entity FE2. 78
Annex B (normative): TETRA group call set-up with external ISDN group members . 85
B.1 User-to-user signalling service 3 . 85
B.1.1 Functional Entity Actions (FEAs). 88
B.1.1.1 Functional entity actions of FE2 . 88
Annex C (informative): Static description of the TETRA ISDN gateway bearer service, using
attributes . 89
C.1 Information transfer attributes. 89
C.2 Access attributes . 89

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Annex D (informative): Mapping of TETRA disconnection causes to ISDN disconnection causes.90
D.1 Mapping of TETRA disconnect causes.90
Annex E (informative): TETRA supplementary services.93
E.1 TETRA supplementary services - SCCF.93
Annex F (informative): Bibliography.94
History.95

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Foreword
This European Telecommunication Standard (ETS) has been produced by the Terrestrial Trunked Radio
(TETRA) ETSI Project of the European Telecommunications Standards Institute (ETSI).
This ETS consists of 14 parts as follows:
Part 1: "General network design";
Part 2: "Air Interface (AI)";
Part 3: "Interworking at the Inter-System Interface (ISI)";
Part 4: "Gateways basic operation";
Part 5: "Peripheral Equipment Interface (PEI)";
Part 6: "Line connected Station (LS)";
Part 7: "Security";
Part 9: "General requirements for supplementary services";
Part 10: "Supplementary services stage 1";
Part 11: "Supplementary services stage 2";
Part 12: "Supplementary services stage 3";
Part 13: "SDL model of the Air Interface (AI)";
Part 14: "Protocol Implementation Conformance Statement (PICS) proforma specification".
Transposition dates
Date of adoption of this ETS: 7 July 2000
Date of latest announcement of this ETS (doa):
31 October 2000
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 30 April 2001
Date of withdrawal of any conflicting National Standard (dow): 30 April 2001

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ETS 300 392-4-2: August 2000
1 Scope
This ETS defines the Terrestrial Trunked Radio (TETRA) system supporting Voice plus Data (V+D). In
accordance with ITU-T Recommendations I.130 [28], the stage one, stage two and stage three of the
three level structure is used to specify the TETRA gateway to Public Integrated Services Digital Network
(ISDN):
- Stage 1, is an overall service description, from the service subscriber’s and user’s standpoint;
- Stage 2, identifies the functional capabilities and information flows needed to support the services
described in stage 1, and
NOTE 1: The information flows in stage 2 have been drawn as Message Sequence Charts
(MSCs).
- Stage 3, defines the signalling system protocols and switching functions needed to implement the
services described in stage 1.
Specifically this standard details the stage 1 aspects (overall service description) of the TETRA gateway
as seen from the TETRA Switching and Maintenance Infrastructure point of view at the T reference point
or coincident S and T reference points for the ISDN subscriber.
NOTE 2: This standard is applicable at the T and S references. It should however be noted, that
no standards exist for the S reference point.
It details the stage 2 aspects (functional partitioning) of the TETRA gateway which includes the
identification of the functional entities and the flows between them and finally it details the stage 3
signalling protocols for the TETRA gateway services, i.e. the protocol at the relevant reference points
between the functional entities defined in stage 2. The described network layer services and protocols
apply for the Switching and Management Infrastructure (SwMI), for the TETRA gateway and to the
keypad protocol for the ISDN subscriber using TETRA services.
A basic call is initiated at the TETRA gateway when, a SwMI detects an incoming call from an ISDN
subscriber to a TETRA user or an outgoing call is made from a TETRA user to an ISDN subscriber. The
TETRA gateway ensures that basic signalling required in the operation of the TETRA call and the ISDN
call is maintained across the gateway.
The TETRA gateway and the TETRA system are seen by the external network as if it were a subscriber
(users side) of the external network. For incoming calls from ISDN three methods of addressing a TETRA
user are applicable, Subaddressing (SUB), Direct Dial In (DDI) and two stage dialing. Other means of
incoming calls using other than ISDN subscriber lines, between the TETRA system and the external
network exchange are outside the scope of this ETS.
End to end encryption is outside the scope of this ETS.
This ETS describes the TETRA gateway function, which provides an ISDN interface to the SwMI. Primary
and basic rate is supported. However, multiple gateways on the same basic rate bus are not supported.
Circuit mode data calls are outside the scope of this ETS.

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ETS 300 392-4-2: August 2000
2 Normative references
This European Telecommunications Standard (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 European Telecommunications Standard only when
incorporated in it by amendment or revision. For undated references the latest edition of the publication
referred to apply.
[1] ETSI EN 300 058-1: "Integrated Services Digital Network (ISDN); Call Waiting
(CW) supplementary service; Digital Subscriber Signalling System No. one
(DSS1) protocol; Part 1: Protocol specification".
[2] ETSI EN 301 065-1: "Integrated Services Digital Network (ISDN); Completion of
Calls on No Reply (CCNR) supplementary service; Digital Subscriber Signalling
System No. one (DSS1) protocol; Part 1: Protocol specification".
[3] ETSI EN 300 092-1: "Integrated Services Digital Network (ISDN); Calling Line
Identification Presentation (CLIP) supplementary service; Digital Subscriber
Signalling System No. one (DSS1) protocol; Part 1: Protocol specification".
[4] ETSI EN 300 097-1: "Integrated Services Digital Network (ISDN); Connected
Line Identification Presentation (COLP) supplementary service; Digital
Subscriber Signalling System No. one (DSS1) protocol; Part 1: Protocol
specification".
[5] ETSI EN 300 141-1: "Integrated Services Digital Network (ISDN); Call hold
(HOLD) supplementary service; Digital Subscriber Signalling System No. one
(DSS1) protocol; Part 1: Protocol specification".
[6] ETSI EN 300 207-1: "Integrated Services Digital Network (ISDN); Diversion
supplementary services; Digital Subscriber Signalling System No. one (DSS1)
protocol; Part 1: Protocol specification".
[7] ETSI EN 300 286-1: "Integrated Services Digital Network (ISDN); User-to-User
Signalling (UUS) supplementary service; Digital Subscriber Signalling System
No. one (DSS1) protocol; Part 1: Protocol specification".
[8] ETSI EN 300 359-1: "Integrated Services Digital Network (ISDN); Completion of
Calls to Busy Subscriber (CCBS) supplementary service; Digital Subscriber
Signalling System No. one (DSS1) protocol; Part 1: Protocol specification".
[9] ETSI EN 300 403-1: "Integrated Services Digital Network (ISDN); Digital
Subscriber Signalling System No. one (DSS1) protocol; Signalling network layer
for circuit-mode basic call control; Part 1: Protocol specification [ITU-T
Recommendation Q.931 (1993), modified]".
[10] ETSI ETS 300 085: "Integrated Services Digital Network (ISDN); 3,1 kHz
telephony teleservice; Attachment requirements for handset terminals
(Candidate NET 33)".
[11] ETSI ETS 300 392-1: "Terrestrial Trunked Radio (TETRA); Voice plus Data
(V+D); Part 1: General network design".
[12] ETSI ETS 300 392-2: "Terrestrial Trunked Radio (TETRA); Voice plus Data
(V+D); Part 2: Air Interface (AI)".
[13] ETSI ETS 300 392-3: "Terrestrial Trunked Radio (TETRA); Voice plus Data
(V+D); Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 1:
General design".
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ETS 300 392-4-2: August 2000
[14] ETSI ETS 300 392-4-1: "Terrestrial Trunked Radio (TETRA); Voice plus Data
(V+D); Part 4: Gateways basic operation; Sub-part 1: Public Switched
Telephone Network (PSTN)".
[15] ETSI ETS 300 392-9: "Terrestrial Trunked Radio (TETRA); Voice plus Data
(V+D); Part 9: General requirements for supplementary services".
[16] ETSI ETS 300 392-12-3: "Terrestrial Trunked Radio (TETRA); Voice plus Data
(V+D); Part 12: Supplementary services stage 3; Sub-part 3: Talking Party
Identification (TPI)".
[17] ETSI ETS 300 392-12-4: "Terrestrial Trunked Radio (TETRA); Voice plus Data
(V+D); Part 12: Supplementary services stage 3; Sub-part 4: Call Forwarding
(CF)".
[18] ETSI ETS 300 392-12-8: "Terrestrial Trunked Radio (TETRA); Voice plus Data
(V+D); Part 12: Supplementary services stage 3; Sub-part 8: Area Selection
(AS)".
[19] ETSI ETS 300 392-12-10: "Terrestrial Trunked Radio (TE
...