09-15-2020 11:02 PM
We are working on a project where we need to test SIP trunk between CUCM & OpenSIPS server. We have created trunk at CUCM end with ping enabled and trunk status shows "Full Service". We are making to make call from OpenSIPS endpoint to Cisco CUCM IP Phone endpoint but unable to make call from CUCM endpoint to OpenSIPS endpoint.
Our OpenSIPS server is in public domain. As per OpenSIPS engineer "Source Port" in INVITE is not fixed thats the reason. Is there any way to fix this source port in INVITE request (e.g. through SIP Normalization script or any other option)?
Thanks & Regards,
09-16-2020 05:26 AM
For time being we have disabled Proxy Authentication module at OpenSIPS end and it's working fine.
Thanks & Regards,
09-16-2020 05:48 AM
"Full Service" just means that CUCM is getting replies to it's Options polling. As far as I'm aware CUCM doesn't support authenticated trunks so if that's still the case with whatever version you're using then disabling authentication looks like the only option.
In your second paragraph, are you referring to the source port used by CUCM, if you switch to using UDP it should use a fixed source port, default being 5060.
09-16-2020 07:00 AM
Source port is port of Cisco IP Phone which is initiating call and i think this is the Cisco IP Phone port on which it registered to CUCM.
09-17-2020 07:50 AM
If the system is configured correctly the phones will only exchange signalling with CUCM, and only CUCM will exchange signalling with the OpenSIP server. If the ports used by the phones are an issue it sounds as if they may be set up to register with OpenSIP instead.
We really need to see CUCM traces or packet captures for your outbound call attempts.
09-18-2020 02:32 AM
By the sound of this you have set your SIP trunk directly between your CM and the OpenSIP system. If that be the case I would suggest to add an SBC, for ex a Cisco router setup to run Cube functionality, between the two systems as that gives you much better inter-working capabilities and also creates a clear secure demarcation point between the two systems.
09-18-2020 03:27 AM
Thanks for suggestion Roger. Yes, we are planning for CUBE also in lab. For time being we are testing one concept so making SIP Trunk between CUCM & OpenSIPS directly.
Our focus area is application development for Cisco infrastructure.
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