OK... so for the newbies.
COM1 isn't really com1 at the serial port level (voltages). It is COM1 at the TTL (transistor-to-transistor-logic) level. You would need build a small board that will change the TTL levels to RS-232. This is the same type of configuration and pin-out that the I-Opener has. Following the links in one of the previos posts will get you to instructions on how to build the converter. Only the TX, RX, GND, and +5 vols are required to have a serial port that works.
Now my question is should DTS, DTR, and the other 2 lines be connected straight through from the TTL to RS-232 side? Or are they even needed at all?