Optional) Enabling The Line Probing Function - Huawei AR1200 series Configuration Manual

Huawei AR1200 Series Enterprise Routers
Configuration Guide - Interface Management
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14.4.8 (Optional) Enabling the Line Probing Function

If the line probing function is enabled on a G.SHDSL interface, the G.SHDSL interface will be
activated at the optimal line rate.
Prerequisites
The G.SHDSL interface has been deactivated.
Context
If the remote DSLAM is configured with the maximum and minimum G.SHDSL line rates, the
local G.SHDSL interface must be activated at a rate within the specified range. Enable the line
probing function on the G.SHDSL interface so that the interface can automatically select an
appropriate rate that is within the specified range.
If the remote DSLAM is configured with a fixed G.SHDSL line rate, the local G.SHDSL
interface must be activated at the fixed G.SHDSL line rate. By disabling the line probing function
Issue 01 (2012-04-20)
The system view is displayed.
2. Run:
interface atm interface-number
The view of the G.SHDSL interface working in ATM mode is displayed.
3. Run:
shdsl current target snr margin upstream value
The uplink SNR is set.
By default, the uplink SNR on a G.SHDSL interface is 6 dB.
4. Run:
shdsl current target snr margin downstream value
The downlink SNR is set.
By default, the downlink SNR on a G.SHDSL interface is 6 dB.
Set the lowest uplink and downlink SNRs on a G.SHDSL interface.
1. Run:
system-view
The system view is displayed.
2. Run:
interface atm interface-number
The view of the G.SHDSL interface working in ATM mode is displayed.
3. Run:
shdsl worst case target snr margin upstream value
The lowest uplink SNR is set.
By default, the lowest uplink SNR on a G.SHDSL interface is 0 dB.
4. Run:
shdsl worst case target snr margin downstream value
The lowest downlink SNR is set.
By default, the lowest downlink SNR on a G.SHDSL interface is 0 dB.
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