tome,
The receiving end is:
Voice Services -> OBiTALK Service -> InboundCallRoute : ph
The default value is simply ph which routes all incoming OBiTALK calls to the PHONE Port.
If you have single-stage dialing or other specialized logic in place that involves trusted callers, you may have a rule that routes trusted callers to the Auto Attendant if the incoming call does not contain a destination number to be called:
Voice Services -> OBiTALK Service -> InboundCallRoute : ...,{(Mcot):aa},{ph}
To bypass the Auto Attendant in this case for a particular calling OBi, you would need to add a rule immediately preceding:
Voice Services -> OBiTALK Service -> InboundCallRoute : ...,{200123456:ph},{(Mcot):aa},{ph}