Hello,

On 12.10.17 12:30, 赵国杰 wrote:

Hello,

In a standard sip flow, the call goes like: sip user A --> kamailio --> pstn --> landline user B. However, when user A has a bad internet access, the audio is broken. So what I want is to let sip user A send a invite to kamailio first, then kamailio send invite to user A and B's landline number through pstn, then bridge the two call together.

I understand this can be achieved by using FREESWITCH originate and bridge command. I've tried but there's no audio both ways, which really makes me feel stupid of myself. So I'm wondering if this can be done with kamailio? If so, how?

kamailio cannot bridge a call like freeswitch does, because kamailio doesn't handle media stream.

The only option that you can do in kamailio to connect two phones is to rely on REFER for doing a call transfer. See dialog module and dlg bridge feature from there, maybe it is enough for what you want to achieve.

Cheers,
Daniel

-- 
Daniel-Constantin Mierla
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