1、CEPT T/SF*3L-OY*E m 2326414 O009220 3 m T/SF 31 -04 E Page 1 Recommendation T/SF 31-04 (Cannes 1983, revised in Odense 1986) INTERCOMMUNICATION ASPECTS OF AN INTEGRATED SERVICES DIGITAL NETWORK (ISDN) Content GENERAL INTERCOMMUNICATION ASPECTS ANNEX 1 : Requirements for Intercommunication between IS
2、DN Bearer Services. ANNEX 2: Requirements for Intercommunication between ISDN and Non-ISDN Bearer Services. ANNEX 3: Requirements for Intercommunication between Teleservices. GENERAL INTERCOMMUNICATION ASPECTS Requirements between ISDN Bearer Services - that the ISDN offers customers a range of Bear
3、er 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 satisfy custo
4、mer needs. This intercommunication should take account of the capabilities of the Bearer concerned and the likely customer applications. O Requirements between ISDN and non-ISDN Bearer Services - that customers using ISDN Bearer Services will require the ability to communicate with other customers o
5、n 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 Telesenices - customers using existing Teleservices provided by the ISDN will
6、require to communicate with customers on the - that in a similar manner, customer using new Teleservices provided by ISDN will benefit from the ability to same Teleservices provided by other networks; communicate with customers on similar existing Teleservices. Detailed Requirements for Intercommuni
7、cation - that the detailed requirements for intercommunication of ISDN services with other services are shown in Annex 1 of 3. a O a a CEPT T/SF*31-04*E 2326434 0009223 5 Annex 1 Internorking of ISDN Bearer Services SUBSCRIBER B ISDN BEARER SERVICES SUBSCRIBER A SDN BEARER SERVICES i .1.1. Circuit M
8、ode, 64 kbit/s unrestricted, Demand 1.2.1. Circuit Mode, 64 kbit/s for speech, Demand 1.3.1. Circuit Mode, 64 kbit/s for 3.1. kHz audio, Demand 1.1.2. Circuit Mode, 64 kbit/s unrestricted, Permanent 1.3.2. Circuit Mode, 64 kbit/s for 3.1 kHz audio, Permanent 1.7.2. Circuit Mode, 1,920 kbit/s, Perman
9、ent l.1.1. Packet Mode, Virtual Circuit, B Channel 2.2. Packet Mode, Connectionless, D Channel I Edition of January i 5, 1988 -0 1 8 n $ c o Li c v) .- 2 C v) . * ;B 3 d o -2 ._ E E * .- u d d - - YES YES YES NO NO NO NO NO KEY: YES -Standardized Interworking possible. NO -Standardized Interworking
10、not possible. ? i further Study. -0 m 8 ci B s- 9 2 Li rn 2- * .- s 2 -t o c B E c .- .e L U - M - - YES YES YES NO NO NO NO NO -0 m n L2 a o 24 ti 2 ;B Li v) . U 24 3 c I c .- 1 2 v c? - YES YES YES NO NO NO NO NO c C 8 o E a 2- c o Li 4 v) 8 Li .- 5 v) . * 3 24 3 E 2 v M 2 c .- 1 - d - NO NO NO YE
11、S YES NO NO NO e 5 - NO NO NO (ES CES ? NO NO - o .- 2 r2 8 m 6 2 s - d M * .e o * 3 4 .- 5 (II - NO NO NO YEL YE! ? NO NO - r3 2 r2 2 8 m 2 o .- L o d * .- c - ? ? ? ? ? ? ? ? - KEY: YES -Standardized Interworking possible. NO -Standardized Interworking not possible. ? -Requires further Study. Edit
12、ion of January 15, 1988 T/SF 31 -04 E Annex 3, Page 1 Annex 3 Teleservice intercommunication requirements due to the introduction of ISDN A. Existing teleservices to be provided in the ISDN to intercommunicate with same services on present networks including existing conversion : 1. Telephone . . .
13、. . . Telephone (PSTN) 2. Videotex . . . . . . . Videotex (PSTN) # 3. Telefax Gr 2/3 . . . . Telefax Gr 2/3 (PSTN, CSPDN) 4. Teletex . . , . . . . Teletex (PSTN, CSPDN, PSDN) 5. MHSS* . . . . . . MHSS (PSTN, CSPDN, PSPDN) * Only electronic mailbox services. # May involve access via PSPDN for informa
14、tion provided. Telex B. New Services that can be provided in the ISDN with minimum intercommunication requirements to other services on present networks and the ISDN: 1. Textfax . , . . , . . Teletex (PSTN, CSPDN, PSPDN, ISDN) (prov. name) Telefax Gr 2/3 (PSTN, CSPDN) Telefax Gr 4 (ISDN, CSPDN) Tele
15、x 2. Telefax Gr 4 . . . . . Telefax Gr 2/3 (PSTN) Telefax Gr 4 (CSPDN) 3. Telephone 7 kHz . . . Telephone (PSTN, ISDN) 4. Video telephone . . . Telephone (PSTN, ISDN, ISDN 7 kHz) This list is not comprehensive and other services may be included. Note: Intercommunication between different services is a separate item of study. Legend : ISDN Integrated Services Digital Network. PSTN Public Switched Telephone Network. CSPDN PSPDN MHSS Message Handling System Service. O Circuit Switched Public Data Network. Packet Switched Public Data Network. Edition of January 15, 1988
