[cisco-voip] FXOLS_GUARD_OUT message

[Ciscozest]

I have Unity with call handler (CH) feature to transfer call to external number. When I make a call from an IP Phone that is registered to CallManager, the Unity CallHandler can perform call transfer smoothly. But if i make call from CME site (voip) to central site where unity and CCM reside, the transfer always failed and I notice my FXO interface status went to connect state then went to FXOLS_GUARD_OUT status before it went on-hook again and the caller was stuck in a kind of music on hold. Anyone has experience this before? I use VIC-FXO (for PSTN link) and also have used command "supervision disconnect signal" under the voice-port. thanks

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