Unlike the modern era that no noise,
External or internal modem for phone cables make a sound. Usually the modem will issue a loud and quite disturbing. You can eliminate the noise by regulating the settings on your modem
Like this way:
1. First go to "Control Panel, then click the icon" System and Security "
2. Then click the menu "System> Device Manager"
3. Choose the modem device, then click "Properties"
4. Move the speaker volume slider to the leftmost position to turn off the sound on the modem.


may be useful
greetings siijo