Insert the modem into the empty slot. Make sure that the modem is firmly seated in the slot. Secure the modem with the screw you removed earlier. If your modem is voice-active, you can get all the voice function including message playing and recording through sound cards by connecting an audio cable from the modem to your sound card. Connect the telephone lines.
Most modem has two modular telephone jacks on the back.
The modem can also be used as an autodialer with your telephone set. Before turning the power back on to the computer, check the telephone connection by lifting the telephone handset. You should hear a dial tone. If you don't, check that all phone cords are firmly connected. If you still don't hear a dial tone, refer to How to Troubleshoot a Modem.