I've done a little research in this area when trying to get my mobile to talk to my Palm IIIx. From what I understand the Nokia 6110 and (possibily 51xx series phones too) support PC to phone communications but only with special software to drive the phone (similar to WinModems). Basically the phone is dumb and only provides the minimum hardware and software to allow for network connections. The PC driver software does all the grunt work. This makes the phone cheaper and simpler but also means access to it is closed. The Nokia 8110 and possibily others however has a true built-in modem that any PC software should be able to use (via cable or IR) with AT commands.
Slashdot Mirror
I've done a little research in this area when trying to get my mobile to talk to my Palm IIIx. From what I understand the Nokia 6110 and (possibily 51xx series phones too) support PC to phone communications but only with special software to drive the phone (similar to WinModems). Basically the phone is dumb and only provides the minimum hardware and software to allow for network connections. The PC driver software does all the grunt work. This makes the phone cheaper and simpler but also means access to it is closed. The Nokia 8110 and possibily others however has a true built-in modem that any PC software should be able to use (via cable or IR) with AT commands.