Based on your description I believe you are talking about the PSTN phone that got called shows "unknown caller". From the looks of your config, it appears that your outbound calls from IP conference phone will go out of voice-port 0/1/0. It appears that the rest of the calls go out of the PRI. On a analog line, telco usually provides the outbound caller ID. The "caller-id enable" provides inbound caller ID from the telco. Telco might not be sending the caller ID for this line. I suggest that you plug an analog phone set into it and see if you get caller ID when placing a call.
You can also run "debug voip dialpeer" to check the dialpeer selection based on digits dialed, etc.
One-way voice can easily be a routing issue. Check to see if the GW can ping the IP phone.
Hope this helps,
Chris