ITU-T Q.939
Typical DSS 1 service indicator codings for ISDN telecommunications services
现行
发布日期 :
2012-03-01
实施日期 :
ITU-T T.107
Enhanced man machine interface for videotex and other retrieval services (VEMMI)
现行
发布日期 :
2011-08-01
实施日期 :
ITU-T X.80
Interworking of interexchange signalling systems for circuit-switched data services
现行
发布日期 :
2025-11-01
实施日期 :
DIN ETS 300048
Integrated Services Digital Network (ISDN) - ISDN Packet Mode Bearer Services (PMBS) - ISDN Virtual Call (VC) and Permanent Virtual Call (PVC) bearer services provided by the B-channel of the user access, basic and primary rate; English version ETS 300048:1997
现行
发布日期 :
2001-08-01
实施日期 :
DIN ETS 300049
Integrated Services Digital Network (ISDN) - ISDN Packet Mode Bearer Services (PMBS) - ISDN Virtual Call (VC) and Permanent Virtual Call (PVC) bearer services provided by the D-channel of the user access; basic and primary rate; English version ETS 300049:1997
现行
发布日期 :
2001-08-01
实施日期 :
DIN EN 14482
Postal services - Trays for international letter mail - Test methods and performance requirements
现行
发布日期 :
2001-01-01
实施日期 :
ITU-R SA.1020
Hypothetical reference system for the Earth exploration-satellite and meteorological satellite services
现行
发布日期 :
2021-03-01
实施日期 :
ITU-R SM.851
Sharing between the broadcasting service and the fixed and/or mobile services in the VHF and UHF bands
现行
发布日期 :
2025-04-01
实施日期 :