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4.5 Handsfree Mode / Group Listening
4.5.1 In Standby Mode
• Press the key.
• Now you can talk to your calling partner without picking up the
handset through the integrated speaker and microphone.
4.5.2 During a Call
• You are holding a conversation using the handset.
• Press the key to activate group listening. Now everyone can
listen to your conversation through the integrated speaker.
Group listening is indicated by the ( ) symbol.
• Press the key again to activate the handsfree function.
• Now you can hang up and continue your conversation through
the integrated microphone and speaker.
• Press the key to end the communication.
4.6 Adjusting the Speaker Volume
During a conversation you can adjust the volume of the handset and that of the handsfree speaker
by pressing the + and – keys.
4.7 Redialling the 10 Last-Called Numbers
The Butler 1800T stores a list of the 10 last-called numbers in the memory.
If you want to refer to this list, proceed as follows:
• Press the key.
• Use the or key to browse through the 10 last calls.
• Pick up the handset or press the key to dial the selected number.
4.8 Mute Function (Deactivating the Microphone Temporarily)
It is possible to deactivate the microphone during a conversation.
• Press the key during the conversation.
• The microphone is deactivated. Now you can talk freely without
the caller hearing you.
• Press the key again to resume your conversation.
4.9 Calling Time Counter
After 15 seconds the calling time appears on the display. Form: minutes – seconds: “00:20”. If you
press one of the numeric keys (0-9) during the conversation, the calling time is reset and reappears
after 20 seconds. At the end of every conversation, the calling time remains visible on the display for
5 seconds.
8
Butler 1800T
Off hook
R e d i a l
0 1 6 3 8 7 4 5
Mute on
0 1 2 3 6 5 8 9 6
( )