1、CEPT Telecom I Formerly Recornmendation T/SF 31-04 E TICAC S 10.4 E Page 1 Recommendation TKAC S 10.4 E (Cannes 1983, revised in Odense 1986, Vienna 1989 (CAC) and Athens 1992) INTERCOMMUNICATION ASPECTS OF AN INTEGRATED SERVICE DIGITAL NETWORK (ISDN) Recommendation proposed by Working Group T/GT 7
2、“Services and Facilities“ (SF) Amendments proposed by Project Team Service Descriptions for the ISDN (SDI) Text of the Recommendation adopted by Commercial Action Committee (CAC) CONTENT 1. REQUIREMENTS 2. GUIDANCE ON QUALITY 3. GUIDANCE ON FACILITIES 4. GUIDANCE ON OPERATION PROCEDURES 5. 6. 7. DEF
3、INITIONS FACTORS TO BE TAKEN INTO ACCOUNT WHEN CONSIDERING THE PROVISION OF SER- VICE INTERCOMMUNICATION FACTORS TO BE TAKEN INTO ACCOUNT WHEN CONSIDERING THE PROVISION OF NET- WORK INTERWORKING Annex 1 Intercommunication and Interworking Annex 2 Intercommunication Overview Annex 3 Requirements for
4、Intercommunication between Teleservices Annex 4 Specific Requirements for Interworking/Intercommunication between ISDN and PSTN The European Conference of Post and Telecommunications Administrations O considering - the existing and growing number of different types of telecornmunications services, a
5、nd terminals, - the growing variety of networks which support these services, - the growing customer expectation for integrated telecommunications between similar service regardless of network boundaries, and in some cases between dissimilar terminals, - a particular new service may not be viable un
6、less it has Intercommunication with existing similar services, recommends that network and terminal designers adopt wherever appropriate the guidelines set out in this Recommendation with the object of causing network and services to work together in a manner likely to satisfy markets needs. Note. T
7、his Recommendation does not apply to terminais capable of supporting more than one service. Edition of November 20. 1992 TZAC S 10.4 E Page 2 i. 2. 3. 4. CEPT T/CAC*S*lOglI E Se! H 232b4llI OOllbOb b3 REQUIREMENTS CEPT Telecom Requirements between ISDN Bearer Services - that the ISDN offers customer
8、s a range Bearer Services to satisfy particular requirements. The range of Bearer Services offered by one particular ISDN may not completely correspond with that offered by another ISDN; - that intercommunication between the same or similar ISDN Bearer Services must therefore be provided in order to
9、 satisfy customer needs. This intercommunication should take account of the capabilities of the Bearer concerned and likely customer applications. Requirements between ISDN and non-ISDN Bearer Service - that customers using ISDN Bearer Services will require the ability to communicate with other cust
10、omers on other networks. Intercommunication must therefore be provided between certain ISDN Bearer Services and Bearer Services on other networks, particularly in the early stages of the introduction of the ISDN. Requirements for Telecetvices - that customers using existing Teleservices provided by
11、the ISDN will require to communicate with customem on the same Teleservices provided by other networks; - that in a similar manner customers using new Teleservices provided by ISDN will benefit from the ability to communicate with customers on similar existing Teleservices. Detailed Requirements for
12、 Intercommunication - that the detailed requirements for intercommunication of ISDN services with other services are shown in Annexes 2 to 4. GUIDANCE ON QUALITY - that inteworking should not degrade the quality of service normally experienced by each of the connected custometc; - that for intercomm
13、unication the target should be not to degrade the quality of service normally experienced by each of the connected customers. GUIDANCE ON FACILTIES - that interworking should not degrade the facilities normally available to each of the connected customers; - that for intercommunication the target sh
14、ould be not to degrade the facilities mmally available to each of the connected customers. GUIDANCE ON OPERATION PROCEDURES - that for interworking the operational procedures should not differ from those nomially performed by each of the connected customers; Edition of Novembcr 20. 1992 CEPT T/CAC*S
15、*L0-4 E 92 m 2326434 0033b07 7TT m CEPT Telecom 5. 6. 7. 7.1 7.2 7.3 TICAC S 10.4 E Page 3 - that for intercommunication departures from normal operational procedures should be minimal and the affected parties suitably advised. FACTORS TO BE TAKEN INTO ACCOUNT WHEN CONSIDERING THE PROVISION OF SERVI
16、CE INTERCOMMUNICATION - Technical - cost - - Market demand and elasticity - Community of interest - National Factors - International factors Market gains form service intercommunication versus possible loss of new network market FACTORS TO BE TAKEN INTO ACCOUNT WHEN CONSIDERING THE PROVISION OF NETW
17、ORK INTERWORKING - - Technical feasibility - cost - - Market demand and elasticity - Community of interest - National factors - International factors Existence of similar services on each network Market gains from Network interworking versus possible loss of new network markets DEFINITIONS Intercomm
18、unication (Between Services) The ability to provide commercially viable communication between one customer terminal intended to offer one type of service and another customer terminal intended to offer a similar or different type of service. (Examples could be Telephone-Radiopager; Low Speed-High Sp
19、eed Data.) linterworking (Between Networks) The ability to provide commercial viable communication between terminals served by one type of network and terminals served by another type of network. (Examples could be: PSTN-ISDN; Telex Network-Packet Switched Network.) Note. In these definitions the te
20、rm commercially viable communication“ is taken to mean communication of a quality and price likely to satisfy the users. Relationship between Service Intercommunication and Network Interworking Service intercommunication may exist between terminals served by one network or different networks. Networ
21、k interworking is necessary to allow service Intercommunication or connection of the same service between different networks (see Annex 1). Edition of November 20. 1992 _- CEPT T/CAC*S*L0-4 E 72 W 2326424 OOLLbOB 636 SERVICE “A“ CEPT Telecom SERVICE “B“ NETW0RK“X“ TICAC S 10.4 E Annex 1. Page 1 INTE
22、RCOMMUNICATION AND INTERWORKING O Annex 1 INTERCOMMUNICATION AND INTERWORKING Intercommunication I In terwo rki ng Edition of November 20. 1992 CEPT T/CAC*S*LO*Y E 92 m 2326434 0033bO9 572 m CEPT Telecom INTERCOMMUNICATION - OVERVIEW ISDN TELESERVICES Telephony 3.1 kHz Telephony 7 kHz Videotelephony
23、 Videotex Teletex TICAC S 10.4 E Annex 2. Page 1 Telefax Group 4 Telefax Group 3 For “data communica- tions“ Annex 2 INTERCOM M U NI CATION - OVERVI E W ISDN BEARER SERVICES Circuit Mock, 64 Wis for speech Circuit Mode, 64 WiVs for 3.1 kHz audio Circuit Mode, 64 WiVs unrestricted Circuit Mode, 64 Wi
24、Vs unrestricted Circuit Mode, 64 WiVs for 3.1 kHz audio Circuit Mode, 2 x 64 kbiVs unre- stricted Circuit Mock, 64 WiVs for 3.1 kHz audio Circuit Mode, 64 WiVs unrectricted Circuit Mode, 64 biVs unrestricted Circuit Mode, 64 WiVs unrestricted Circuit Mode, 64 WiVs for 3.1 kHz audio Circuit Mode. 64
25、WiVs unrestricted Circuit Mode, 64 WiVs for 3.1 kHz audio Packet Mode Virtual Circuit X.31, case A, if the called subscriber sends UUS, the network responds with the indication of impossibility to deliver the information. b) Impossible; if the calling subscriber sends UUS, the network responds with
26、the indicatkn of impossibility to deliver the information. SUB-ADDRESS a) Impossible; if the called subscriber sends SA, the network responds with the indication of impossibility to deliver the information b) Impossible; if the calling subscriber sends SA, the network responds with the indication of
27、 impossibility to deliver the information Edirion of November 20. 1992 CEPT T/CAC*S*10.4 E 92 2326414 0031635 876 Call Waiting Calling Line Identification Presentation Direct Dialling-in Closed User GroupiOA Closed User Group CEPT Telecom X X X X X TiCAC S 10.4 E Annex 4. Page 3 Terminal Selection S
28、PECIFIC REQUIREMENTS FOR INTERCOMMUNICATION/INTERWORKING BETWEEN ISDN AND PSTN X 8. TERMINAL PORTABILITY (CAN APPLY DURING EITHER OUTGOING OR INCOMING) User-to-User Signalling Sub-addressing Three Patty Service a) No limitations. b) No limitations. X X X I SUPPLEMENTARY SERVICE I ISUP/lUP+ MANDATORY
29、 I ISUP/lUP+ PREFERRED I Table of the required signalling capabilities needed for supplementary services from the service point of view. Note 1. A call with a service mark ISUP/TUP+ mandatory must be rejected if a suitable route is not availabie. Note 2 When an ISUPiUP+ route is preferred, but not available. the call will be allowed to mature wer non ISUPTTuP+ routes to lhe destination, even though the required supplementary service my rot be available via $e a!temahe signalling systems. Edition of November 20. 1992
