Topcom Butler 4812 USB VoIP
•Press the Line key 
.
•The number shown on the display, is dialled automatically.
•After finishing your call, press the Line key 
to hang up.
4.2.6 An internal call: calling another handset
This function only works if multiple handsets are subscribed to the base unit !
•Press the INT key 
twice.
•‘INT‘ appears on the display
•Dial the number of the handset you would like to call.
•After finishing your call, press the Line key 
to hang up.
4.3Receiving a PSTN Call
4.3.1 Receiving an external call
•All subscribed handsets will ring when you receive a call.
•The Call symbol 
blinks on the display.
•The telephone number of the caller appears on the display if you have Caller ID service (CLIP). Consult your telephone company. The name of the caller also appears on the display if:
–the name is programmed into the Phone Book
–the network sends the name together with the telephone number (FSK CID system only).
•Press the Line key 
to accept the external call.
•During the call ‘EXT’ and the symbol 
appear on the display. The call timer starts running.
•After finishing your call, press the Line key 
to hang up or put the handset back on the base unit.
4.3.2 Receiving an internal call
This function only works if multiple handsets are subscribed to the base unit!
•The handset rings.
•‘INT’ and the number of the handset calling, appear on the display. The Call symbol 
blinks on the display.
•Press the Line key 
to accept the internal call.
•During the call, ‘INT’, the handset number of the caller and the symbol 
appear on the display. The call timer starts running.
•After finishing your call, press the Line key 
to hang up.
4.3.3 Receiving an external call during an internal call
If you receive an external call during an internal call, you will hear a call waiting tone (double beep) on both handsets being used for an internal call.
•Press the Line key 
twice to accept the external call.
•After finishing your call, press the Line key 
to hang up.
ENGLISH
Topcom Butler 4812 USB VoIP | 11 |