ShoreTel multiple 200 OK response SIP messages Home Blog ShoreTel multiple 200 OK response SIP messages Posted On: March 24, 2022Posted By: Trifecta TelephonyCategorized as Knowledge Base Tagged Mitel, Shoretel, troubleshooting, Unified Communications ShoreTel multiple 200 OK response SIP messages This is because the SBC is using a FQDN (in the SIP contact host field) and the switch is trying to populate an IP address. Change it to the the IP of the ShoreTel switch instead. Post navigation Previous PostNext Post