Call back feature

[Harrisonm]

We have a call back feature enabled on a queue but when the caller chooses to be called back and presses 2 the call fails.

I tested it myself and my cell phone did not even ring and call failed .

When I check on the our voip monitor I see the error 403 Do Not Use Late Offer-answer Model .

 

[Alphabetic]

What do the 3CX logs say?

 

[JohnS_3CX]

Hi,

Are you using a supported provider? please provide some more details as per this post:
https://www.3cx.com/community/threads/information-to-provide-when-requesting-help.67558/