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ring detection issues with fxo port

Callmanager Express, IOS version 12.3.8.T3. Four fxo ports.

At least two symptoms. When a number is dialed the port goes into ring-det state for several seconds, enough time to produce two ringback tones for the caller. Finally the port goes off hook and the ip phone starts ringing. The call can be answered normally.

This is where it gets gross. A second call to the hunt group vascillates between the ring-det and on-hook states, about once a second. I haven't tried a third and fourth call yet.

Wiring? Configuration? The ports are configured as loop start and ground start doesn't work at all.

1 REPLY
Bronze

Re: ring detection issues with fxo port

Try debugging the following ,

debug voip ccapi inout

debug vtsp all

debug vpm all

debug mgcp pack

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