[cisco-voip] T.38 Faxing -- Echo Cancellation

[Ovidiu Popa]

Hello

You might try to compare the two configuration files using "show run all"
 which also displays the default values for all the parameters. Use a
compare tool as the the result is verbose.

Best regards,
Ovidiu

On Wed, Nov 16, 2016 at 4:16 PM, Scott Voll <svoll.voip at gmail.com> wrote:

> if I have a PRI that is only doing T.38 faxing to a Fax server, is best
> practice to turn off echo Cancellation?
>
> I moved from an old 3825 to a 2951 from 12.1 to 15.5.  Both are running
> MGCP to CM and SIP to the Fax Server.
>
> But I'm getting a high amount of Fax tickets not going through or
> transmission errors.  Trying to figure out what might be the cause.
>
> did a stair and compare and the only thing I saw different in CM was the
> echo cancel was set to 64 (old) to 128 (new).
>
> on the CLI the only difference was:
>
> mgcp behavior rsip-range tgcp-only
> mgcp behavior comedia-role none
> mgcp behavior comedia-check-media-src disable
> mgcp behavior comedia-sdp-force disable
>
> the 15.5 code is a starred release.
>
> TIA
>
> Scott
>
>
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>
>
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