Resuming a PSTN call that was put on hold results in one-way audio in Skype for Business Server 2015

ນຳໃຊ້ກັບ: Skype for Business Server 2015

Symptoms


In a Microsoft Skype for Business Server 2015 environment, consider the following scenario:
  • A PSTN user starts a call with a Skype for Business client user. The connection is established, and the audio is fine.
  • The Skype for Business client user places the call on hold.
  • The Skype for Business client user resumes the call.
In this situation, the PSTN user can’t hear the Skype for Business client user, but the Skype for Business client user can hear the PSTN user.

Cause


This issue occurs because the Skype for Business Mediation Server can’t correctly process the SIP SDP message that’s received from the gateway.

Resolution


To fix this issue, install the July 2019 cumulative update 6.0.9319.559 for Skype for Business Server 2015, Mediation Server.