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CEPT Signalling Systems (L1 and L2) for Analogue Inter-PABX Lines

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CEPT Signalling Systems (L1 and L2) for Analogue Inter-PABX Lines TS 101 059 V1.1.1 (1997-11) Technical Specification Corporate telecommunication Networks (CN); CEPT signalling systems (L1 and L2) for analogue inter-PABX lines European Telecommunications Standards Institute 2 TS 101 059 V1.1.1 (1997-11) Reference DTS/CN-00006 (9t000icr.PDF) Keywords PABX, leased line ETSI Secretariat Postal address F-06921 Sophia Antipolis Cedex - FRANCE Office address 650 Route des Lucioles - Sophia Antipolis Valbonne - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88 X.400 c= fr; a=atlas; p=etsi; s=secretariat Internet [email protected] http://www.etsi.fr 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. 3 TS 101 059 V1.1.1 (1997-11) Contents Intellectual Property Rights................................................................................................................................9 Foreword ............................................................................................................................................................9 Introduction ........................................................................................................................................................9 1 Scope......................................................................................................................................................10 2 References..............................................................................................................................................10 2.1 Normative references....................................................................................................................................... 10 2.2 Other normative references.............................................................................................................................. 10 3 Abbreviations.........................................................................................................................................11 4 Overview and explanation .....................................................................................................................12 4.1 Text of the former CEPT Recommendations................................................................................................... 12 4.2 Diagrams of the former CEPT Recommendations........................................................................................... 12 4.2.1 Numbering and cross-references ................................................................................................................ 12 4.2.2 SDL diagram symbols ................................................................................................................................ 13 4.2.3 SDL diagram state names........................................................................................................................... 14 Annex A: CEPT Recommendation T/CS 49-01 ..................................................................................15 A.1 Principles and fields of application........................................................................................................15 A.2 System L1 line signals ...........................................................................................................................17 A.3 Line sending and detecting requirements...............................................................................................17 A.3.1 General............................................................................................................................................................. 17 A.3.2 Line signal conditions and signalling codes..................................................................................................... 17 A.3.3 Sending of signals............................................................................................................................................ 18 A.3.3.1 Continuous tone-on condition .................................................................................................................... 18 A.3.3.2 Continuous tone-off condition.................................................................................................................... 18 A.3.3.3 Single tone-on pulse signal......................................................................................................................... 18 A.3.3.4 Double tone-on pulse signal ....................................................................................................................... 18 A.3.4 Detection of signals.......................................................................................................................................... 18 A.3.4.1 Continuous tone-on condition .................................................................................................................... 19 A.3.4.2 Continuous tone-off condition.................................................................................................................... 19 A.3.4.3 Single tone-on pulse signal......................................................................................................................... 19 A.3.4.4 Double tone-on pulse signal ....................................................................................................................... 19 A.4 Line signalling transmission requirements ............................................................................................19 A.4.1 Signal sender.................................................................................................................................................... 19 A.4.1.1 Tone-on condition ..................................................................................................................................... 19 A.4.1.1.1 Signal tone frequency ........................................................................................................................... 19 A.4.1.1.2 Signal tone power ................................................................................................................................. 20 A.4.1.1.3 Long-term mean power during signalling............................................................................................. 20 A.4.1.2 Tone-off condition ..................................................................................................................................... 20 A.4.1.3 Sending-end splitting arrangements ........................................................................................................... 21 A.4.1.3.1 No speech path provided during sending tone-on................................................................................. 21 A.4.1.3.2 Speech path provision during the tone-on signal condition on the line................................................. 21 A.4.1.4 Signal direction .......................................................................................................................................... 21 A.4.2 Signal receiver ................................................................................................................................................. 21 A.4.2.1 Signal conditions........................................................................................................................................ 21 A.4.2.1.1 Tone-on condition ................................................................................................................................ 21 A.4.2.1.2 Tone-off condition................................................................................................................................ 21 A.4.2.2 Interference and simulation ........................................................................................................................ 21 A.4.2.2.1 Signal recognition interference............................................................................................................. 22 A.4.2.2.2 Signal simulation .................................................................................................................................. 22 A.4.2.3 Receiving-end splitting arrangements and spill-over.................................................................................. 22 A.4.2.4 Through-transmission interference............................................................................................................. 22 4 TS 101 059 V1.1.1 (1997-11) A.4.2.4.1 Speech immunity .................................................................................................................................. 22 A.4.2.4.2 Data immunity ...................................................................................................................................... 23 A.5 General line signal transfer procedures .................................................................................................23 A.5.1 Seizure ............................................................................................................................................................. 23 A.5.2 Seizing-acknowledgement or proceed-to-send................................................................................................
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