Topcom Butler 4812 USB VoIP
4.4Activate/deactivate handsfree function
This function allows you to communicate without having to pick up the handset. When you are talking, press the Up/Handsfree key 
/ 
to activate the handsfree function.
Press the same button to deactivate the handsfree function.
When you are calling in handsfree mode and you want to change the volume, press the Volume 
button.
When you use the handsfree function for a long time, the batteries will be empty quickly!
4.5Transferring a call to another handset
•You have an external caller on the line.
•Press the INT key 
twice.
•The external call is now on hold.
•‘INT‘ appears on the display.
•Dial the number of the handset to which you would like to transfer the call.
•If the handset dialled is answered, you can have an internal conversation. Press the Line key 
and the external call is transferred.
•If the handset dialled is not answered, press the Down key 
to speak to the external caller again.
4.6Out of Range Warning
If the handset is out of range of the base unit, a warning signal will sound.
•‘SEARCHING’ appears on the display and the symbol 
blinks on the display.
•Move closer to the base unit.
•As soon as you are back within range of the base unit, a signal sounds and the symbol 
stops blinking.
4.7Setting the speaker volume
Use the Volume/Ringer key 
/ 
to set the volume of the speaker (handset). You can select from 5 levels. The telephone is set to level ‘3’ by default.
During a call, you can change the volume:
•Press the Volume/Ringer key 
/
.
•The volume level currently set appears on the display.
•Use the number keys to set the desired level
•Press the Volume/Ringer key 
/
to confirm your selection.
You have 8 seconds to set the desired volume; if you do not, the telephone returns to standby mode and the volume remains unchanged.
12 | Topcom Butler 4812 USB VoIP |
