[Freeswitch-users] no Ringing-Signal on incomming calls via mod_freetdm/sangoma_isdn

[Helmut Kuper]

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Hello,

today I switched from old openzap PRI-Stack to freetdm with
sangoma_isdn because of some odd problems with our EWSD switch.

Setup was quite easy. Only one thing is strange. When I call into FS
from pstn to a sip phone I get no ringing resp ALERTING signal to my
pstn phone. Executing ring_ready in dialplan just befor bridging
works. Unfortuantely it shows the same behaviour as using
"instant_ringback=true", e.g. First ringing then busy ...

I had that problem also using old openzap.

So today I looked around in FS code and found that when mod_sofia
sends a SWITCH_MESSAGE_INDICATE_RINGING on receiving a sip 180 reply
back to the caller's channel it works.

Is there any reason why sofia doesn't do this by default?

Oh, I use FS git-1d3417a 2011-06-07 17-35-49 -0400.


best regards
helmut
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