What do you mean by combining a phone in the PSTN with your IP Phone ? Are you trying to reach an IP Phone from PSTN ? With one phone number you can map to only one ip phone, unless both ip phones share the same line. You can use "connection plar X" where X is the extension of the IP Phone to transfer the incoming call.
Sankar Nair
UC Solutions Architect
Pacific Northwest | CDW
CCIE Collaboration #17135 Emeritus
