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Old 07-19-2012, 09:18 AM
maxvasquezcacho maxvasquezcacho is offline
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Default Fax T38 problem IPO 8 (42)

Hi, everyone.

I've got some issues sending fax over a SIP Trunk.

Here's the scenario:

My IPO is connected with a SIP trunk with my SIP Provider (Level 3). I use an analog fax Machine connected in a combo card slot.

The problem arrives when my fax dial to a fax number in the PSTN.

First of, the call is established in G.729a, then when the carrier detects the fax tone sends me an invitation in T38, but the IPO responds in G.729 and the call puts on hold and I listen to the hold music.

I don't know what's going on. I talked with L3 and they told me that my PBX is the problem.

Any suggestions?

Thanks in advance and I apologize for my english (I'm not native speaker)

Regards,
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