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Configuration Guide for Cisco DSLAMs with NI-2
OL-2074-03
Chapter 4 Configuring Digital Subscriber Lines
Setting DSL Profile Parameters
Setting Bit Rate Parameters for SHTU-C Interfaces
To set the bit rate for SHTU-C parameters for a profile, use the following procedure that modifies the
default bit rate parameters in your DSL profile:
Example
The following example shows how to use the shdsl bitrate command to configure the upstream and
downstream bandwidth at 2312 kbps:
DSLAM(config)# dsl-profile austin
DSLAM(cfg-dsl-prof)# shdsl bitrate 2312
Setting Signal-to-Noise Ratio Margins
This section describes how to set signal-to-noise ratio (SNR) margins for both downstream and upstream
traffic for ATU-C CAP, ATU-C flexi CAP, ATU-C flexi DMT, 4xDMT, and SHTU-C interfaces. The
higher the SNR margin the more protection there is against data corruption. The higher the SNR margin
the lower the data rate a given loop can support.
ATU-C CAP and ATU-C Flexi CAP Interfaces
Use the following profile configuration commands to set the SNR value for a selected ATU-C CAP or
ATU-C flexi CAP profile:
Command Purpose
Step 1
DSLAM(config)# dsl-profile austin
Enter DSL profile configuration mode.
Step 2
DSLAM(cfg-dsl-profile)# shdsl bitrate rate
Configure a bit rate in kbps. The valid rates are 72, 136,
200, 264, 392, 520, 776, 1032, 1160, 1544, 2056, and
2312 kbps.
Step 3
DSLAM(cfg-dsl-profile)# end
Exit from profile configuration mode.
Command Task
Step 1
DSLAM# configure terminal
Go to global configuration mode.
Step 2
DSLAM(config)# dsl-profile profile-name
Go to profile configuration mode and specify the
profile-name for which you want to set SNR margins.
Step 3
DSLAM(cfg-dsl-profile)# cap margin downstream 0-12
upstream 0-12
Set the SNR downstream and upstream margins to
integers 0 through 12.
Step 4
DSLAM(cfg-dsl-profile)# end
Exit from profile configuration mode.
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