Butler 3055
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.
4.4 Activate/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.
Note : When you are calling in handsfree mode and you want to change the volume, press the Volume
button 
.
Attention !! When you use the handsfree function for a long time, the batteries will be empty quickly !
4.5. Headset connection
You can connect a headset with a 3 pole jack plug of 2,5mm on the right side of the handset. When the headset is connected, you can only hear and talk through the headset. The headset microphone can still be muted by the Mute key. The handsfree speaker can still be activated by pressing the handsfree key 
.
4.6Transferring a call to another handset
• You have an external caller on the line.
• Press the Programming key 
.
• ‘INTERCOM’ appears on the display.
• Press the Programming key 
.
• 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.
4.7Out 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.
4.8 Setting 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.
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