You could simply do a Feature 66, dial the extension number of the room and listen to everything in the room. Hang up when you are done. It is an active call though and the listening phone would be seen as on a call as well as the phone in the baby's room.
It is an imperfect way to monitor. You would be better off getting a regular baby monitor. $40 bucks or so.
MRoberts
mroberts@americaii.com
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