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NM-HD-2VE 64ms echo cancellation

Can the NM-HD-2VE support echo cancellation greater than 32 ms?

I have a customer with echo on their PRI gateway, CCM 3.3(3). In the past I have extended the echo cancellation to 64 ms to cure echo. This is the first time using this combination of hardware for PRI and I cannot find how to extend the tail coverage.

The module is installed in a 3725 with one VWIC-1MFT-T1 (PRI) and one VIC2-2FXS. The current IOS is 12.2.(15)ZJ. I also tried 12.3(4)T4 but still no echo coverage greater than 32 ms. I have tried changing the codec complexity on the voice card to medium and high, but all that did was provide less channels on the PRI.

Any suggestions are appreciated!

2 REPLIES
Cisco Employee

Re: NM-HD-2VE 64ms echo cancellation

Shawn,

The G.168 echo canceller which allows longer tail coverage was not introduced for the NM-HD-2VE until 12.3(4)XD or 12.3(7)T. If you upgrade to either of these IOS's you will have access to the extended ecan commands.

Hope that helps.

Ademola

New Member

Re: NM-HD-2VE 64ms echo cancellation

Thanks Ademola!

The 12.3(7)T worked!

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