No. The COM220 is designed to pick up a call and cannot be overridden. A better approach would be to use a phone line sharing device. Note that the phone line sharing device must simulate a normal phone line accurately or it won’t work correctly with the COM220.
One phone line sharing device that has been used successfully by our customers is “The Stick” by Multi-Link. This device takes one incoming phone line and breaks it out to four separate lines. It does require ac power to run. For more information, refer to the Multi-Link website.