Inbound calls not ringing SIP clients
We seem to be having trouble with inbound calls reaching our SIP clients (both hard and softphones).
Phones appear to be registered okay, and can call out. When an inbound caller tries to reach that same extension, the call goes directly to voicemail. If I unregister/re-register the SIP client, inbound calls work for a short time, then stop working after 10-30 minutes, even though the phone stays registered with ringroost.
Any suggestions?