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SIP message 504 gateway timeout

I have a fax server (10.130.44.12) with sip trunk to cisco voice gateway (10.110.255.130). The Fax team informed me that they can't send any faxes.

I monitored the gateway and I have faxes goining to the PSTN. I see that the fax server is sending lots of invites to my gateway and than I  they get a gateway timeout.

FAX server <----SIP-----> cisco gateway <----PRI-----> PSTN

This is my dial peer that is't hitting:

dial-peer voice 21 pots

description Triparty Simulation outbound

preference 1

destination-pattern 08T

progress_ind setup enable 3

progress_ind alert enable 8

progress_ind connect enable 8

port 0/0/0:15

I use translatorX to debug the sip messages.

Did I miss something in the config?

sip call flow.JPG

1 REPLY

SIP message 504 gateway timeout

Problem solved. A firewall was blocking my 100 trying to the fax server.

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