Cisco ATA 192 Not Receiving another call after one inbound call

Question

Hope someone can help.We have followed the setup instructions for the ATA192, we can make outbound calls with no issues. We can receive 1 call, but cannot receive another call for around 10-15 minutes. The line goes straight to voicemail, the line status on the ATA GUI page is showing the line is not active. It just seems it is not sending the disconnect message on incoming calls telling RingCentral the incoming call is complete. We can make an outbound call and receive a call afterwards, which is the strange issue.I've also found these errors in the logs, I believe it has something to do with the BYE message:ATA192-MPP local1.err vsock: RTP_LIB: librtp_wait_for_rtcpbyemsg():548: librtp_wait_for_rtcpbyemsg Failed to recv RTCP BYE from CSS and time out happenedNot using CUCM or MPP sotfware.

josecoki · Answer

jzeglin,Most of the time the issue is that the ATA is not receiving a disconnect signal so it waits 15 minutes until it times out. Usually it has to do with reverse polarity, if the end device of the analog line is polarity sensitive. You can fix this 2 ways:Physically invert the tip and ring wires going to the analog device.In the ATA, there is a setting under voice>line>FXS Port Polarity Configuration where you change the settings from Forward to reverse.Hope this helps!Jose

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