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 ...
As I already stated I do not see any issue with using REFER so I would not remove REFER from Allow in Sp headers.
Here is the description which I wrote last year I believe and there is also working SIP flow of Hold with REFER.
One member of community mentioned issues in APAC region due to missing MoH bot there which was also causing issues for them.
DaveChomi Yes, since the time of this topic I can confirm that call transfers, including internal ones, are working fine. We just had to figure out that Teams would send REFER back to SBC and expect SBC to send new INVITE back to Teams using passed Refer-To header with MS-style 'x-t' and 'x-m' tags. Also original Referred-By header must be preserved on new call.