Inbound direct SIP call not working on the app.

[Wipeout_dude]

Hi,
Just installed the server (hosted at Digital Ocean) and I am wanting to use direct SIP (email address style) as a way to forward calls for the old IP PBX while we migrate everything over.. I have done some testing and direct SIP appears to work when the endpoint is a Snom D715 on the desk but doesn't work to an iphone running the app.. The app phone rings twice and then disconnects I simply get this in the activity log..

07/06/2022 10:09:00 - [CM503003]: Call(C:15): Call to <sip:[email protected]:0> has failed; Cause: 487 Request Terminated/INVITE from 127.0.0.1:5483

So the call is reaching the server and triggering the phone to ring but then the app seems to simply abandon the call.. The caller continues to here a ringing sound.. I also tried connecting the phone via 4G to see if the issue might be related to the local network but had the same result..

Anyone else had this issue and able to shed any light on it?

Thanks.

 

[leejor]

It may have something to do with timing, as the mobile is not registered all the time, and has to "wake up".

If this is only for a short "transition " period, you might try sending the calls the normally terminate to a mobile only, to an IVR first. This will ensure the call is answered. The IVR can then send the call to the extension of the mobile. The other option may be to use the Ring my Mobile option, on the extension and route the calls back out over the mobile network.