ADC HDSL4 Benutzerhandbuch

All user options for the H4TU-C-319 List 1 (

) can be set to the factory default values using the 

MODE and SEL pushbuttons. To set the user options to their default values:

Press the SEL pushbutton for 6 seconds until the following message appears:

DFLT NO

Press the SEL pushbutton while the 

DFLT NO

 message is displayed. 

The message changes to 

DFLT YES

 indicating the factory default values are now in effect and the display 

returns to the normal mode. 

To terminate the DFLT mode without setting the factory default values, do one of the following:

Press the MODE pushbutton to return to the normal display mode.

Wait 30 seconds for the unit to return to the normal display mode.

To scroll through the current settings of all system parameters, press the MODE pushbutton for 3 or more seconds. 
The H4TU-C-319 displays the following parameters:

Software version number

List number

Type of frame pattern received from the DSX-1

Line code of the signal received from the DSX-1 

All user-configured parameter settings

Loop attenuation threshold setting

Margin alarm threshold setting

System alarms can be disabled by pressing the SEL pushbutton on the H4TU-C-319 front panel for less than 3 
seconds. This executes an ACO and returns the H4TU-C-319 to its non-alarm state. For more information about 
alarms, see 

 for instructions on using the MODE and SEL pushbuttons to activate 

loopbacks.