User's Manual
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM     
65
[Trans/Pgm]  +  ##  + Flex. Button 8  + Station Number +      [Hold/Save] 
① Press the [Trans/Pgm] button, [Trans/Pgm] LED will flash(60 IPM Flash) and [On/Off] LED will be 
turned on.. Then you can enter then user program mode. 
② Press ## . 
③  Press flexible 8 
④  Dial station number that you want to de-subscribe. 
⑤  Press [Hold/Save], you will be heard confirmation tone. 
Condition 
1)  Wireless terminal must be de-subscribed to system for normal service. 
2)  Only attendant can de-subscribe the wireless terminals. 
3)  Attendant can de-subscribe another wireless terminal after one subscribing procedure. 
4)  If attendant want to de-subscribe wireless terminal that was subscribed already, it will be heard 
error tone. 
2) At the GDC-335H 
[Function]  +  9  +    0000  +  [Function]  +  Select Park number  + [Function] 
① Press [Function( )] button 
② Press 9 
③ Enter User PIN number “0000” 
④ Press [Function( )] button 
⑤   Select PARK number with UP( ), DOWN( ) key. 
⑥ Press [Function( )] button 
⑦ If the below LCD message is displayed. Power-off the wireless terminal 
E S BSCRDIUB
RE S PWPRS
3) At the GDC-340H 
[MENU(UP or DOWN)] 
+ 5 + 2 + PIN Code + 
[OK] + 
 or    (To select FP#) + 
[OK] 
① Press MENU(UP or DOWN) button. 
② 
Press . (Or set ‘
>
’ mark to ‘
5 System
’ by pressing 
UP
( ) button or 
DOWN
( ) button and 
press 
OK
 button). 
③ 
Press . (Or set ‘
>
’ mark to ‘
5 UnRegister
’ by pressing 
UP
( ) button or 
DOWN
( ) button and 
press 
OK
 button). 
④ 
Enter PIN code(0,0,0,0) If a user has changed PIN code before, the changed one should be 
entered. 
⑤ 
Press
 OK 
button. 
⑥ 
If necessary, press 
UP
( ) button or 
DOWN
( ) button to select FT number which is desubscribed. 
If the desubscribed FT number is displayed on the second line of LCD, stop pressing 
UP
( ) button 
or 
DOWN
( ) button. 
⑦ 
Press 
OK 
button. 
* Note 
①
  GDC-340H tries to synchronize to next registered system. 
②
  If there isn’t next registered system, handset displays “UNREGISTERED” on LCD. 










