Forum Discussion
MS Teams Direct Routing - Internal call transfer failure
Hi all, My organisation is planning a move to direct routing. We have an AudioCodes VE SBC. I've been working on this for awhile and got everything to a pretty decent state. I've come across ...
Hi Sims,
I've removed the ".*" rule from my installation and created all specific rules for DIDs and still no luck, I can see SIP REFER coming back to PBX when I'm trying to transfer call that came from PSTN to Teams user. No luck here, unfortunately. Did you have any luck with this? Thanks.
Lt_Flash I had no luck with changing the voice route, so ended up raising it with MS support.
Apparently if you disable REFER as an allowed method within your SBC's signalling messages, then MS Teams does not use REFER for transfers and just re-INVITEs to the SBC. That way the internal transfers work perfectly fine.
- How did you disable REFER? I mean - does your SBC sends some 4xx code when MS sends a SIP REFER message? Or somehow different? Thanks!
No, not by rejecting the REFER with a response code. I basically did a message manipulation rule to re-build the Allow header for calls to MS Teams without including REFER. Which vendor are you using? If you have an AudioCodes as well, I can give you the rule syntax.
Hi could you please share the syntax? I am in the same boat, many thanks in advance.
Paula
