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I'm having calls to TEAMS getting disconnected after Teams transfers to the PSTN.

in Acme Packet (MOSC) 13 commentsAnswered

We have the 3820 SBC appliance with version SCZ910p5.

Carrier trunking from AT&T.

Direct routing to MS Teams.

This situation involves a call that comes from the Carrier through the SBC to a Teams auto-attendant. Teams transfers the call back through the SBC to a PSTN number, and the call is answered by that person.

After approximately 10 seconds that outbound call is dropped by AT&T. The inbound call remains connected until I manually drop the call.

REFER-TO: <sip:17142649183@sip.pstnhub.microsoft.com:5061;user=phone;transport=tls>

REFERRED-BY: <sip:sip.pstnhub.microsoft.com:5061


In the Teams realm we have:

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