Telephone to computer interface in java

I am trying to interface computer to telephne..

The basic problem is i want to detect the ring & detect the pressed numbers

on telephone keypad, Through modem which is connected to a serial port.

I have use javax.comm package., & ring is detected using this package..

Is it possible to detect the pressed numbers using this package?...

am I on the right track?..

Please help me...

Thanks in advance....

[460 byte] By [chandakhanapurea] at [2007-10-1 1:06:07]