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G.SHDSL NTU User Manual V0.03
79
Framing is required to recover the channelized E1. In transparent operation, the framing is configured as Unframed.
In this case the G.SHDSL framer must be set to Nx64 with N=32. For any framing such as FAS or CAS, the G.SHDSL
framer must be set to E1, then the E1 framing here may be set accordingly. The default setting is PCM31C.
Channel
Framing
PCM31
FAS
PCM31C
FAS+CRC4
PCM30
FAS+CAS
PCM30C
FAS+CAS+CRC4
FULL
Unframed E1 (transparent)
PCM31 and PCM31C / FAS and FAS+CRC4
FAS
0
1
2
3
4
5
6
7
8
31
Time Slot
64k
64k
64k
64k
64k
64k
64k
64k
64k
64k
1408k
9 ~ 30
Maximun Data Rate 1948kbps
CAS
Also known as time slot 16 multiframing. It requires a multiframe alignment
signal to be present for frame sync. The Multiframe Alignment Signal (MFAS) is
inserted into the 16th timeslot of frame 0 of the 16-frame multiframe.
In CAS mode, there have 30 channels available for user data. If timeslot 16 is
included in the unit’s mapping, it will be disregarded.
FAS
Frame Alignment Signal use 7-bit pattern to establish and maintain frame
synchronization. The FAS word is located in timeslot 0 of frame. In FAS mode there
have 1~31 timeslot available for use data.
Summary of Contents for G.SHDSL NTU
Page 1: ...G SHDSL NTU User Manual Version 0 03...
Page 9: ...G SHDSL NTU User Manual V0 03 8 1 4 Applications...
Page 30: ...G SHDSL NTU User Manual V0 03 29 E1 Interface...
Page 52: ...G SHDSL NTU User Manual V0 03 51...
Page 55: ...G SHDSL NTU User Manual V0 03 54...
Page 117: ...G SHDSL NTU User Manual V0 03 116 For E1 and Ethernet interface model...
Page 119: ...G SHDSL NTU User Manual V0 03 118 For Serial interface model For Ethernet interface model...