I need to place SIP calls to and receive SIP calls from other clients
registered with the same Asterisk box (v. 1.11), using TLS/SRTP encryption
(mandatory). I was making some tests with a Jitsi client and a Blink client
(some users like this softphone, while I prefer Jitsi) on a Windows 7
machine. When using two Blink clients everything works fine, but if I try
to connect a Jitsi client with a Blink client I cannot make it work.
The Jitsi client registers with the Asterisk server (it processes the
certificate without problems) but when I try to place a call to the Blink
client I get a “Call failed – Not acceptable here” error and the Asterisk
CLI logs “WARNING: chan_sip.c:8432 process_sdp: Matched device setup
to use SRTP, but request was not!” on seing the asterisk cli it was showing
me "matched device setup to use srtp but request was not".
Similarly, If I try to place a call from the Blink client to Jitsi, the
client rings but the call is dropped as soon as I press the Answer button .
Maybe I am missing some configuration detail, since it seems that the Jitsi
client is expected to use SRTP while it doesn’t.
Any help would be greatly appreciated.