Forum Discussion
PSTN Call transfer ends call - Direct Routing
Currently running Ribbon SBC 2K setup for Teams direct routing.
If Party A (external caller) calls Party B (Teams user) and Party B attempts to transfer the call, the call in Teams drops / ends, before any number is dialled (Transfer keypad appears for approx 1 second). Party A call remains up.
However in the reverse, if Party B (Teams user) calls party A (external caller), the call can be transferred. The transfer dialogue remains open so a number can be inserted.
Teams client and Ribbon SBC all at latest versions and any calls placed on hold can be resumed without incident.
That was the really strang part. I wasn't receiving any INVITE, REINVITE or even BYE. The call would stay up as far as SBC is concerned. Anyway I Enabled Hold Music on Teams SG on the Ribbon SBC. This has fixed the issue even though calls on hold were never at fault.
Thanks for the response though!
2 Replies
- Do you have a copy of the SIP trace in both directions? I've seen similar when a SIP INVITE is sent to Teams during the middle of a call, causing Teams to drop the call.
That was the really strang part. I wasn't receiving any INVITE, REINVITE or even BYE. The call would stay up as far as SBC is concerned. Anyway I Enabled Hold Music on Teams SG on the Ribbon SBC. This has fixed the issue even though calls on hold were never at fault.
Thanks for the response though!
