Hi, Few months back I configured Asterisk 11.6.0 for an outbound fax using T.38 protocol as listing down the flow below;
Asterisk Fax server -> (IP) -> Cisco VGW ->(IP) -> Carrier The issue I'm currently getting when Asterisk receives warnings as listed below, it is overloading the Cisco VGW, therefore need to restart Asterisk service or sometimes reboot VGW to clear these warnings. [Mar 24 09:25:01] WARNING[28645][C-00000004] app_fax.c: Unable to write frame to channel; Resource temporarily unavailable [Mar 24 09:25:01] WARNING[28613][C-00000002] app_fax.c: Unable to write frame to channel; Resource temporarily unavailable The configuration in sip.conf for T.38 is listed below; t38pt_udptl = yes,fec,maxdatagram=400 faxdetect = t38 Udptl.conf; udptlstart=4000 udptlend=4999 udptlfecentries = 3 udptlfecspan = 3 use_even_ports = no Please advise at earliest to overcome this issue. -- Regards, Ahmed Munir Chohan
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