CEPT T CS 20-11 E-1981 Analogue Subscriber-s Line Hunting《模拟用户线寻线》.pdf

1、CEPT T/CS*ZO-LL*E 3 232bY34 0004523 - 3 I -A TCS20-11 Page 1 E Recommendation T/CS 20-11 (Innsbruck 1981) ANALOGUE SUBSCRIBERS LINE HUNTING Recommendation proposed by Working Group T/WG 11 “Switching and Signalling” (CS) Text of the Recommendation adopted by the “Telecommunications” Commission: “The

2、 European Conference of Postal and Telecommunications Administrations, considering - that in accordance with the principles outlined in Recommendation T/CS 20-01 LI1 the exchange and network features which are required for the implementation of services and facilities should be identified and specif

3、ied; - that the feature line hunting is commonly used in the Europeancountries when private automatic branch exchanges are connected to the network, recommends to the members of the CEPT, to use the following definition and arrangements for the analogue subscribers line hunting feature.” a 1. DEFINI

4、TION Analogue subscribers line hunting is debed as the ability of an exchange to select, on receipt of a certain telephone number, one free line in a multi-line group corresponding to that number. 2. DESCRIPTION The search procedure is initiated when the subscribers directory number is called. The o

5、rder of search is in accordance with predetermined rules for the particular group. This feature is required for use on incoming calls only. 3. TECHNICAL CHARACTERISTICS Two main types of hunting procedures exist. - Random search, is where the search for a free line shall not necessarily start with t

6、he same line each time. - Sequential search, is where the search for a free line always starts with the same line and then follows This description will cover a range of search procedures. a fixed order. 4. UTILISATION The line hunting feature is used for the following services: - line hunting; - di

7、rect dialling-in. Reference i Recommendation T/CS 20-01. Exchange and network features. Note: The studies on this series (T/CS 20) of Recommendations for the features in an analogue environment has now been terminated. A continuation of the studies has started with the aim to amend these existing features, where necessary, and to specify new features for the ISDN. These Recommendations will be gathered in a new series of Recommendations. O Edition of May 15, 1986