Hello, i have a Asterisk 16.12 installed on Centos 7 with PJSIP, connected to IBM Gateway, and i have a question:
how can i read custom headers from REFER message response from another SIP Server?
1-Asterisk dial a SIP URI to IBM Gateway
2-IBM Gateway add custom sip header
3-IBM Gateway send SIP REFER message to Asterisk
The transfer is OK, but the call back does not have the custom header