T.38 support on MGCP with CCM-Manager Config

Unanswered Question
Nov 10th, 2009
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We would like to get to a point where t.38 faxing is supported on all of our MGCP gateways. We seem to keep hiting bugs that make such a deployment difficult at best.


Two problems we have run into:


Bug: CSCsw34479

causes mgcp configuration be be cleared anytime a new config is pulled from Call Manager via either a reload or the ccm-manager config command. Bug was supposed to be resolved by CUCM 7.1.2 but still seeing issue with 7.1.2.21900-5 and CME IOS 12.4(24)T2.


Second major issue:

CSCsy29533 - MGCP T38 Fax Relay is disabled even when it is configured.

have not been able to retest with CME IOS 12.4(24)T2 or 15.0.1M.


Does anyone have a environment where T.38 is working reliably?


Jack Poehlman

Aviall, Inc

Dallas, TX

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