Modem issue troubleshooting

Step1 :

Please go to Control Panel -> System -> Hardware -> Device Manager to check whether the modem is recognized in Windows and if there is any Question Mark (?), Red cross (X) or Admiration Mark (!)
Step2 :

Make sure that the modem line is connected to a RJ-11 phone jack and not to a RJ-45 network port
Step3 :

Please connect the modem line directly to an outlet on the wall.
Step4 :

Please use a telephone line to connect a telephone to make sure the phone line is functioning
Step5 :

Please go to Start -> Programs -> Accessories -> Communication -> Connection Wizard to create a new dial-up network. Double click on the icon and enter the Master Volume Control and make sure that no leveler is set at "mute" status and the volume is leveled at high level. Then apply dial-up connection to check whether a dialing tone can be heard.
Step6 :

Please remove the original driver and install the latest one.
Step7 :

Please update to latest BIOS.