Samsung NX30 ユーザーズマニュアル

Q1 I cannot hear the modem sound.
A1 Check that the telephone line is properly connected to the modem.

A2 Check that the modem driver is installed properly.
1. 

Click Start > Control Panel > Performance and Maintenance > System.

2. 

Select Hardware tab > Device Manager > Modems in the System Properties 
window, and check if there is a yellow exclamation mark on the installed modem 
icon. If there is, delete the modem device driver and reinstall the driver, because 
the yellow exclamation mark represents a not properly installed driver.

3. 

If there is no yellow exclamation mark, double-click the installed modem, and 
click Diagnostics tab > Query Modem in the Modem Properties window to 
diagnose the modem.
No message in either of Command and Response in the Diagnostics tab means 
that the modem is not operating properly. 
Diagnose the modem again after restarting the system or reinstalling the driver. 
(You have to exit all programs using modem in the advance of diagnostics of the 
modem).

A3 Although I can make a connection with the modem, I cannot hear the dial tone 

and modem connection sound. In this case check the following list:

1. 

Click Start > All Programs > Accessories > Entertainment > Volume Control.

2. 

Clear the Mute check box in the Telephone Line item.
(Depending on the sound driver, it may be displayed as another name such as 
Modem, Phone, Mono. If there is no corresponding item, click Options > 
Properties > Volume Control, select 'Playback', and select the 'Telephone Line' 
under the 'Display the following volume controls'. Click OK.)

In general, the dial tone of a PBX or a digital phone switching system is not a 
continuous one, unlike that of trunk line. 
Therefore, the modem may not make a call because the modem mistakes the dial 
tone from a PBX or a digital phone switching system as a busy tone. 
In this case, complete the following procedures.