Environment: Skype for Business Standard Edition Sonus 1000 Toshiba PBX Toshiba <-> Sonus <-> Skype for Business Issue: When on a SFB Conference call  and a user dials in from Toshiba PBX via Sonus to the SFB Conference, after exactly 5 minutes the call would hang up. Resolution: Here were the steps to troubleshoot the […]