Setting The Earpiece/Loudspeaker Volume; Internal Calls - AUDIOLINE Pro 280 Bedienungsanleitung

Telephoning
Call timer
Your handset automatically times the duration of every call in hours, minutes
and seconds.

Setting the earpiece/loudspeaker volume

/
Muting the microphone

Internal calls

Internal calls, transfers and conference calls are only possible if multiple
handsets are registered. If this is not the case NOT POSSIBLE will be
indicated on the display.
Making an internal call
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During a call you can adjust the volume in 5 levels (if tele-
phoning "normally" -> earpiece volume, with hands-free ->
loudspeaker volume).
These seperate settings will remain at the last selected level
when you end the call.
During a call you can switch your handset's microphone off.
The display shows MUTED.
To unmute press the C softkey again.
Press the Internal softkey. If two handsets are registrated to
the base station the other handset will be called immediately.
If three or more handsets are registrated to the base station
their internal numbers will be displayed (for example 2 3 4).
Press the internal number you want to call.
If you press "9" in the case of several registered handsets all
will be called at the same time.