User manual

Chapter 5. Configure via Console Port
5-14
The power backoff of SHDSL is a transmit power negotiation
mechanism applied between STU-C and STU-R to limit the power
transmitted on the SHDSL line to the minimum necessary for a clear signal
to be received at the STU-C.
For configuring framer, move the cursor to framer and press [ENTER].
Select the parameters via [TAB] key.
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annex Configure shdsl annex
margin Configure shdsl margin
psd Configure shdsl psd
pwr_backoff Configure power backoff
>> framer Configure shdsl framer
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Command: setup shdsl framer <e1|Nx64k> <1~32> <1~31>
Message: Please input the following information.
SHDSL Framer (TAB Select) <E1>: Nx64k
Set Time Slot Number (Enter for default) <0>: 8
Set First Time Slot (Enter for default) <1>: 1
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Though ITU 991.2 (SHDSL) supports data rate of 2304kbps, G.703
(E1) 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. There are two types of frames on SHDSL line, E1 and N x 64k.
E1 frame only use for connection with E1 DCEs.
STU-C (E1)
STU-R (E1) DTEDTE
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).