3cx issue with yeastar TE100 E1 gatway

[Mina Hanna]

Dears ,
Kindly, I have customer has 3cx with 32 sim enterprise edition configured Yeastar analog gateway TA410 by sip trunk and also configured with Yeastar TE100 pri gateway. the issue is all calls come through analog gateway works good the customer and all agents can receive calls and both of them can hear themselves clearly But all calls come through TE pri gatway the customer and all agents can receives call but the customer can hear the agents but agents cant hear customers So kindly advice.

 

[QueBall]

Yeastar published this help document:
https://support.yeastar.com/hc/en-us/articles/218345607-VoIP-Gateways-for-3CX-Phone-System

3cx does not have them listed in their supported gateways:
https://www.3cx.com/voip-gateways/

So 3cx has not validated interoperability. Doesn't mean it cannot work. More than likely Yeastar has not applied for official testing. Or unlikly is they failed this testing but usually it's just a case that the two companies have not done any formal relationship for testing and validation of the equipment.

Beyond that you can capture traffic from the 3cx Activity log screen and analyze the voip traffic with a tool like Wireshark.

It is likely one of the devices is sending the wrong IP address as the RTP endpoint during the SIP Invite stages. Start with the examples that Yeastar posted. If that doesn't help you will need to analyze the traffic by doing the capture traffic steps.