Siemens hicom 150 H optiset E standard Operating Instructions Manual page 12

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Speaker
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Your telephone rings with a specific call signal:
• When you receive an internal call, your telephone
rings once every four seconds (single-tone
sequence).
• When you receive an external call, your telephone
rings twice in rapid succession every four seconds
(dual-tone sequence).
• When you receive a call from the entrance tele-
phone, your telephone rings three times in rapid
succession every four seconds (triple-tone se-
quence).
• If a call is waiting, you hear a short tone (beep) every
six seconds.
The number or the name of the caller appears on the
display.
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The telephone rings. The caller appears on the screen.
Lift the handset.
or Raise or lower the volume. Keep pressing the key until
the desired volume is set.
Ending the call:
Replace the handset.
or
Press the key.
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The telephone rings. The caller appears on the screen.
Press the key. The LED lights up.
Speakerphone mode and open listening.
or Raise or lower the volume. Keep pressing the key until
the desired volume is set.