192.168.200.201 is the default IP on the CPC card.

As far as the OS/2, that is on the EVMC card which is the voicemail. (Embedded Voice Mail Card).

If something else is set on the CPC card you'll need to run Wireshark or some other network analyzer to figure out the IP. You can also connect via serial but you will need to make a proprietary DB9 connector. If you do a search in the Inter-tel forum you can find the pinout.