Hey Guys, Normally I don't manage our 3CX system but the current tech is on leave. We had everything working fine at one of our satellite offices that has a Patton 4112 Analog Gateway installed. It recently lost one of the two lines and stopped allowing outbound calls. The second line was fixed and the FXO enable and is working but the unit will still not allow outbound calls. 3CX server reports 503 Service Unavailable when trying to route calls to the Patton. Debug info on the sip-gateway shows: 09:49:20 SIP_ER> [GW GW_SIP] NO PROVIDER FOUND 09:49:20 SIP_SI> [STACK] Process unhandled INVITE packet 09:49:20 SIP_ER> [STACK] INVITE REQUEST ON GENERIC SERVICE MANAGER 09:49:20 SIP_ER> [STACK] REQUEST OUT OF DIALOG (INVITE) Any help of where to look would be appreciated.