Integration of 3rd party CC software with 3CX using SIP TRUNK

[AspireCCT]

Hi All,

We are trying to integrate our call center software with the 3CX PBX. We're having trouble with the SIP TRUNK configuration.

I have not found on the support site the proper place for interoperability testing or the place to purchase support for this issue.

Would appreciate directions...

Micha

 

[YiannisH_3CX]

Here you go, everything you need to know about how 3CX works can be found in the following link: https://www.3cx.com/blog/docs/voip-provider-interop-explained/

 

[AspireCCT]

Thank you very much! However, we aren't a VOIP provider - we're a software application. So, isn't this a bit different? Does 3CX have a developer program or ISV partner prograsm?

 

[YiannisH_3CX]

If you are looking to use the SIP trunk functionality of 3CX to test your integration then that is what you need. We do not have a developer or ISV partner program so you will need to do your own testing.

 

[AspireCCT]

Hi

Understood and thanks! If I encounter a problem (Which I have ), how can I get support from 3CX for interoperability issues?

 

[YiannisH_3CX]

Unfortunately you cannot as we do not offer a developer partner program. If you have any questions we can answer you can post them here and we will do our best to assist you. However we cannot support any third party solutions.

 

[AspireCCT]

I understand, thank you.

Our problem at the moment is as following:

we have connected our app to the 3CX PBX using a SIP TRUNK. A call comes into the trunk, goes to our server, and then we want to refer it to a 3CX extension.

When we refer the call to an extension we receive an error - FORBIDDEN.

this happens in both "plain" SIP TRUNK config and "bridge" config.

What is the configuration on the TRUNK to allow this?

Thanks in advance!

 

[YiannisH_3CX]

To better understand the scenario, the call comes into the PBX via a different trunk (?) and goes to your server via the trunk you created and then you want to refer it to an extension back through the trunk?

 

[AspireCCT]

Exactly. I am attaching a PCAP file for this scenario.

[Edited by Admin]

 

[YiannisH_3CX]

Under the trunk settings try to enable the options " Supports Re-Invite " and " Support Replaces " and see if that works.
Also i have deleted the pcap as it may contain info that you do not want on a public forum

 

[AspireCCT]

Thanks for the offer - was already configured like that - and no luck.

Any other ideas?