I got it to work:
Here are the key points:
Cisco Config:
voice service voip
fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback none
My dial peer looks like this:
dial-peer voice 55555551 voip
preference 1
destination-pattern 5555555
voice-class codec 1
voice-class h323 1
session target ipv4:192.168.1.1
dtmf-relay h245-alphanumeric
fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback pass-through g711ulaw
no vad
In the SR140 T38 confgi:
media_renegotiate_delay_ou
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by: brianj51Posted on 2008-02-26 at 12:51:22ID: 20988660
I have the *exact* same issue.
Cisco 2821 VOIP voice gatway with SR140. I've been working with Cantata on the problem and they say it is a Cisco problem as well. Someone has to be doing outbound faxing with either an SR140 or TR1034 board via a Cisco gateway... My voice gatway config is very similar to your posted above.