User guide

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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
Example
This example turns off trellis encoding for the default profile and displays the results:
DSLAM# configure terminal
DSLAM(config)# dsl-profile default
DSLAM(cfg-dsl-profile)# no dmt encoding trellis
DSLAM(cfg-dsl-profile)# end
DSLAM# show dsl profile
dsl profile default:
Link Traps Enabled: NO
Alarms Enabled: YES
ATM Payload Scrambling: Enabled
DMT profile parameters
Maximum Bitrates:
Interleave Path: downstream: 640 kb/s, upstream: 128 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Minimum Bitrates:
Interleave Path: downstream: 0 kb/s, upstream: 0 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Margin: downstream: 6 dB, upstream: 6 dB
Interleaving Delay: downstream: 16000 usecs, upstream: 16000 usecs
Check Bytes (FEC):
Interleave Path: downstream: 4, upstream: 6
Fast Path: downstream: 0, upstream: 0
RS Codeword Size: downstream: 16, upstream: 8
Trellis Coding: Disabled
Overhead Framing: Mode 2
Operating Mode: Automatic
Training Mode: Quick
Minrate blocking: Disabled
SNR Monitoring: Disabled
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Setting the Overhead Framing Mode
To set the overhead framing mode of a DMT profile, follow these steps:
This command does not retrain the port when you change the parameter value.
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 the overhead
framing mode.
Step 3
DSLAM(cfg-dsl-profile)# dmt overhead-framing
{mode0 | mode1 | mode2 | mode3}
Set the overhead framing mode.
Note If you use a mode other than mode3, the
following warning appears: ”Not all Framing
Modes are supported by each Line Card or
CPE. Verify actual framing mode once the
CPE has trained with show dsl interface atm.
Step 4
DSLAM(cfg-dsl-profile)# end
Exit from profile configuration mode.