Comments by sanjaylk (Top 3 by date)

which OS? if windows then configure dialer for your system and try by outgoing calls.
also check is modem really voice modem? mine is data modem , i was able to dial a call with noise or fax data.
Once all setup done manually then you can get some API's for accessing them via JAVA ( might be u need JNI to use windows libs)

Reason for my vote of 5
works for me too :-)