We have a strange intermittent issue with a ring group. This ring group has 2 members and on occasion when a call comes into the ring group, user A will answer and immediately have a busy signal while the continues to ring for user B. User B can pick up the call and the caller is there. This happens both ways, only occurring 3-4 times a week so it has been really hard to troubleshoot. Any suggestions would be appreciated.
Most likely a signalling/routing issue, endpoints are getting the INVITE packet from the PBX but not receiving the CANCEL. I would expect other symptoms such as the phone not ringing at all on an inbound call, possibly channels stuck open after one end hangs up, that sort of thing.
Thank you for the response. We will run Wireshark and do some further testing.
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