How to fix Microsoft Teams SIP 486 Busy Here to Q.850 mappings in Ribbon SBC

Hi All, in this article I'll show you how to solve a very strange behaviour of Ribbon SBC EDGE (1K/2K) in a Microsoft Teams Direct Routing scenario, where the SIP Response 486 Busy Here is not correctly converted in the Q.850 Cause Code 17 in a TDM (PRI/BRI) PSTN connection How to enable Busy on...

Diagnostic ID: 10500 and sip-reason=”Q.850; cause=44; text=”Requested Circuit/Channel N/A”

Hi all, recently one of our Skype for Business Enterprise Voice customer found many of these Unexpected errors in it's Monitoring Reports Request: INVITE Response: 500 Diagnostic ID: 10500 Category: Unexpected Component: Mediation Server Reason: Gateway responded with 500 Server Internal Error Description: This response from a gateway can occur if the gateway encountered an unexpected condition that prevented the...