ITU G.704:1998
ITU G.704:1998 Synchronous Frame Structures Used At 1544, 6312, 2048, 8488 And 44 736 Kbit/s Hierarchical Levels Describes functional characteristics of interfaces associated with network nodes and PCM multiplexing equipment.
Table of Contents
1Scope2Basicframestructures
2.1Basicframestructureat1544kbit/s
2.2Basicframestructureat6312kbit/s
2.3Basicframestructureat2048kbit/s
2.4Basicframestructureat8448kbit/s
2.5Basicframestructureat44736kbit/s
3Characteristicsofframestructurecarryingchannels
atvariousbitratesin1544kbit/s
3.1Interfaceat1544kbit/scarrying64kbit/s
channels
3.2Interfaceat1544kbit/scarrying32kbit/s
channeltimeslots(seeNote)
3.3Interfaceat1544kbit/scarryingnx64kbit/s
4Characteristicsofframestructurescarryingchannels
atvariousbitratesin6312kbit/sinterfaces
4.1Interfaceat6312kbit/scarrying64kbit/s
channels
4.2Interfacesat6312kbit/scarryingotherchannels
than64kbit/s
5Characteristicsofframestructurescarryingchannels
atvariousbitratesin2048kbit/sinterfaces
5.1Interfaceat2048kbit/scarrying64kbit/s
5.2Interfaceat2048kbit/scarryingnx64kbit/s
6Characteristicsofframestructurescarryingchannels
atvariousbitratesin8448kbit/sinterface
6.1Interfaceat8448kbit/scarrying64kbit/s
channels
6.2Interfaceat8448kbit/scarryingotherchannels
than64kbit/s
ANNEXA-ExamplesofCRCimplementationsusingshift
registers
A.1CRC-6procedureforinterfaceat1544kbit/s
(see2.1.3.1.2)
A.2CRC-5procedureforinterfaceat6312kbit/s
(see2.2.3.2)
A.3CRC-4procedureforinterfaceat2048kbit/s
(see2.3.3.5)
ANNEXB-Alphabeticallistofabbreviationsusedin
thisRecommendation)/Dest[2500R/XYZnull
674null]/Parent3730R/Prev3760R