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Octal-Port DMT ATU-C Line Card
dmt rate-adaptation interval
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Cisco IOS Release 12.1(6)DA
Usage Guidelines Use the dmt rate-adaptation interval to specify the frequency at which line margins are checked on a
DMT port. The dmt rate-adaptation interval command works in conjunction with the
dmt rate-adaptation margin command. If the actual SNR margins on a port remain lower than the
margins configured in the dmt rate-adaptation margin command, for the duration of time specified in
the dmt rate-adaptation interval command, the line drops and retrains to a lower bit rate, to improve
SNR margin quality on the line.
Note If line conditions improve, the line does not automatically drop and retrain to a higher bit rate. If the
line conditions improve, the administrator must execute a shut then a no shut on the port to retrain
to a higher bit rate.
Examples The following example configures a downstream monitoring interval of roughly 60 to 150 seconds. The
upstream monitoring interval is 20 seconds.
config terminal
dsl-profile austin
dmt rate-adaptation interval downshift downstream 10 upstream 20
Related Commands Command Description
dmt rate-adaptation enable Turns on rate adaptation.
dmt rate-adaptation margin Sets the SNR margins below which a DMT port retrains to a lower
bit rate.