Solved 2N intercom stops to work after V.18 upgrade

[alberto.azzini]

Hello, is anybody experiencing issues with 2N intercoms after V18 upgrade with "on premise" PBX?
What i'm experiencing is very weird.
Basically intercom should call a ring group of physical Yealink T23G phones when you press one of the buttons.
When this should happen, on V.18 i see the call stays stuck on Initiating and never moves to "Routing" status (i can wait one hour and it stays there, filling concurrent calls until there are no more).
3CX active calls:

Wireshark:

I actually tried the latest beta 18.0 upd.1 (build 214) too but problem is still present on that version too.

I tried a rollback to V16.0.8.9 and it works correctly.
3CX active calls:

Wireshark (looooonger):


I asked 2N but they can't come to a solution too, and as it works on v.16 and not on v.18 it seems PBX related.
Any suggestion?

 

[JohnS_3CX]

Hi Alberto,

Can you replicate the problem if you make a call to the ring group using a supported device?

If yes, I would like to see that capture.

 

[alberto.azzini]

Isn’t T23G still supported? (https://www.3cx.com/sip-phones/yealink-t20p-t22p-t26p-t28p/)
Btw i have T23G only on this customer. I don’t understand the difference after upgrade .
Tomorrow i’ll be at the customer with another phone (T31P) but i can’t change 34 phones cause an upgrade...

 

[JohnS_3CX]

Yes, the T23G is fully supported. I will PM you for details.

 

[JohnS_3CX]

It looks like an incompatibility between your 2N doorphone and the T23G.

You have two options so it can start working again in V18:

a) disable the video on the doorphone entirely if you don't need it - problem solved

OR

b) use sendrcv Attribute for Video - problem solved

 

[alberto.azzini]

I confirm it is working correctly now (I used option 2). Thank you!

 

[JohnS_3CX]

You are welcome!