Topcom Butler 2820
5.12 KEY LOCK
When the keypad is locked, pressing any key will have no effect during standby (except holding the 
key).
•Press and hold the 
key
•
appears on the display and the keypad is locked
•Press and hold the 
key again to
When there is an incoming call, you can still answer the call by pressing the Line button 
. During the call, the keypad functions as normal. When the call is ended, the keypad will be locked again
5.13 SETTING THE DIALLING MODE
There are two types of dialling mode:
DTMF/Tone dialling (the most common) (default)
Pulse dialling (for older installations)
To change the mode of dialling:
•Press and hold the flash R button to toggle between dialling modes: ‘P’ will appear when set to pulse or ‘T’ when set to tone (DTMF) dialling
•After 5 sec. the unit returns to standby
•
Caution: The base dialling mode is independent from the handset.
To set the base dial mode please look at §9.3.
6. CALLER-ID FUNCTION (CLIP)
The Topcom B2820 displays the telephone numbers of incoming calls. This function is only possible if you are subscribed to a telephone operator that provides this service. Contact your telephone provider for more information. When you receive a call, the numbers are saved in a Call list. This list can hold 20 telephone numbers (each of max. 25 digits). If the number is longer then 14 digits, you can press the 
key to show the other digits!
6.1 NEW CALLS
When you’ve received a new unanswered call, the CLIP symbol 
will blink on the display.
6.2 CONSULTING THE CALL LIST
•Press the Call Log button 
. The last received call is shown on the display. If the list is empty, ‘NO CLIP’ is shown on the display.
•The following will be shown on the display:
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ENGLISH
• After 5 seconds, the telephone number will be shown. You can skip the date/time by pressing the 
button.
•Use the left scroll key 
to scroll to the previous call. Use the 
button to show the next call.
•You can leave the Call list by pressing the 
button.
6.3 CALLING A NUMBER FROM THE CALL LIST
•Scroll through the Call list until the desired number is shown on the display.
•Press the Line button 
. The number will be dialled automatically.
Topcom Butler 2820 | 11 |