Proscend 5099N Series, Руководство пользователя

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5099N Series User Manual
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FAS
0 1 2 3 4 16
31
Time Slots
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.
0 1 2 3 4 5 6 7
8 31
Time Slots
64k 64k 64k 64k 64k 64k 64k 64k 64k 64k 1408k
9 ~ 30
Maximun Data Rate 2048kbps
ITU 991.2 (2004) (G.SHDSL.Bis) supports data rate up to 5696Kbps, but G.703 (E1 standard)
only 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 # of TS
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 up
to 5696kbps data rate, but E1 supports maximum data rate of 2048kbps (32 x 64k).
STU-C (E1)
STU-R
(V.35)
DTE DTE
V.35
E1 SHDSL
Unframed N=32
STU-C (V.35)
STU-R (E1) DTE DTE
E1
V.35 SHDSL
Frame N x 64 (N=1~31)
Time slots, N value, are placed in the frame. If time Slot Number is1 from 1~31 (N=1~31), it is
Fractional E1. If time Slot Number is 32 (N=32), it is unframed.