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G.SHDSL NTU User Manual V0.03
80
PCM30 and PCM30C / FAS+CAS and FAS+CAS+CRC4
FAS
0
1
2
3
4
16
31
Time Slot
64k
64k
64k
64k
64k
64k
64k
896k
17 ~ 30
CAS
5 ~ 15
704k
Data Rate (x) 960kbps
Data Rate (y) 960kbps
Maximun Data Rate = x + y = 1920kbps
CRC4
The CRC-4 checksum bits are transmitted in the outgoing E1 data stream.
Also the received signal is checked for errors.
CRC-4 checksum cannot be sent in unframed mode.
Unframed
In this mode, user data is inserted into all 32 channels (64k x 32 = 2048k) of
the E1 stream. The object of running without framing is to utilize the full
bandwidth of the E1 line.
UNFRAMED
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 2048kbps
G.703 (E1) can supports data rate of 2048kbps, so the maximum data rate of SHDSL line, connected with E1 DCEs,
depends on data rate of E1, 2048kbps.
STU-C (E1)
STU-R (E1)
DTE
DTE
E1
E1
SHDSL
Frame E1
Data rate 2048
If the connection is E1 vs V.35 or V.35 vs E1, the frame has to be used N x 64k. In this case, the data rate depends on
value of N. Same as above case, SHDSL and V35 can support 2304kbps data rate (36 x 64k) but E1 supports
maximum data rate of 2048kbps (32 x 64k).
Содержание G.SHDSL NTU
Страница 1: ...G SHDSL NTU User Manual Version 0 03...
Страница 9: ...G SHDSL NTU User Manual V0 03 8 1 4 Applications...
Страница 18: ...G SHDSL NTU User Manual V0 03 17 2 3 1 For E1 Interface AC power input version DC power input version...
Страница 19: ...G SHDSL NTU User Manual V0 03 18 2 3 2 For Serial Interface AC power input version DC power input version...
Страница 20: ...G SHDSL NTU User Manual V0 03 19 2 3 3 For Ethernet Interface AC power input version DC power input version...
Страница 30: ...G SHDSL NTU User Manual V0 03 29 E1 Interface...
Страница 36: ...G SHDSL NTU User Manual V0 03 35 3 5 1 Sub Menu tree for SETUP E1 Interface SYSTEM SETUP SETUP E1 SETUP E1...
Страница 52: ...G SHDSL NTU User Manual V0 03 51...
Страница 55: ...G SHDSL NTU User Manual V0 03 54...
Страница 116: ...G SHDSL NTU User Manual V0 03 115 For Ethernet interface model For E1 and Serial interface model...
Страница 117: ...G SHDSL NTU User Manual V0 03 116 For E1 and Ethernet interface model...
Страница 119: ...G SHDSL NTU User Manual V0 03 118 For Serial interface model For Ethernet interface model...
Страница 120: ...G SHDSL NTU User Manual V0 03 119 For E1 and Serial interface model For E1 and Ethernet interface model...
Страница 137: ...G SHDSL NTU User Manual V0 03 136 The front view of DB 25 F Serial interface connector on rear panel...