Octal-Port DMT ATU-C Line Card

dmt rate-adaptation interval

dmt rate-adaptation interval

To change the intervals during which a DMT port is monitored for signal-to-noise ratio (SNR) margins, use the dmt rate adaptation interval command in DSL profile configuration mode. To disable

dmt rate adaptation interval, use the no form of this command.

dmt rate-adaptation interval {downshift [downstream number-ofeoc-updatesupstream seconds]}

Syntax Description

downshift

The downshift keyword indicates that a line with excessive SNR margins retrains

 

 

to a lower bit rate.

 

 

 

 

downstream

The downstream keyword tells IOS to monitor downstream ports for SNR margins

 

 

exceeding those specified in the dmt rate-adaptation margin command.

 

 

 

 

number-of

The number-ofeoc-updatesargument specifies the monitoring interval in multiples

 

eoc-updates

of six seconds on a downstream DMT port.

 

 

Note The downstream margin (see “dmt rate-adaptation margin” section on

 

 

page 24) is obtained from the CPE via the embedded operations channel

 

 

(EOC). The downstream number-ofeoc-updatesparameter specifies a

 

 

number of consecutive EOC read events. Depending upon the type of CPE,

 

 

EOC messages are sent once every 6 to 15 seconds (not counting EOC

 

 

timeouts). Hence, a downstream downshift interval value of 10 on CPE

 

 

reporting margins every 6 seconds results in a 1 minute monitoring interval

 

 

(10x6 seconds). Specifying a downstream downshift interval value of 10 on

 

 

CPE that report margins every 15 seconds (10x15 seconds) yields a 2.5

 

 

minute monitoring interva1.

 

 

 

 

upstream

The upstream keyword tells IOS to monitor upstream ports for SNR margins

 

 

exceeding those specified in the dmt rate-adaptation margin command.

 

 

 

 

seconds

The seconds argument specifies the monitoring interval in seconds on an upstream

 

 

DMT port.

 

 

 

Defaults

Command Modes

Command History

Following are the default settings for the dmt rate adaptation interval:

•downstream— 10

Note Remember, a downstream value of 10 can yield a monitoring interval between 1 minute to

2.5minutes in length.

•upstream—10

DSL profile configuration

ReleaseModification

IOS 12.1(6)DA

This command was introduced.

 

 

Cisco IOS Release 12.1(6)DA

22

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Cisco Systems 8xDMT manual Dmt rate-adaptation interval, Defaults Command Modes Command History
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8xDMT specifications

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