Some fax calls to a particular number are failing from multiple 3.101 servers. The server rejects the t.38 Re-INVITE that was sent from my carrier to the server which is then responding with a “488 Not acceptable here”. I’ve tried enabling t.38 passthrough on the server and with the carrier to no avail. Thoughts?
What’s the output of:
asterisk -x"pjsip show endpoint <trunk endpoint>" | grep t38
How do I find the trunk endpoint? And does the vrtual fax device use SIP by default or PJSIP?
asterisk -x"pjsip show endpoints"
[root@xxxx ~]# asterisk -x"pjsip show endpoint 86xxpjsip" | grep t38
t38_udptl : false
t38_udptl_ec : none
t38_udptl_ipv6 : false
t38_udptl_maxdatagram : 0
t38_udptl_nat : false
Where did you enable it?
Go to the Trunk and enable the T38 settings.
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