Mitel 4150 - Manual (Page 6)

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ABOUT YOUR PHONE
The SUPERSET 4150 has ten fixed-function keys ( HOLD, SUPERKEY,
SPEAKER, MICROPHONE,
and ) and 14 personal keys with built-in
status indicators. The personal key on the bottom right is always your Prime
Line; the remaining personal keys can be programmed as Feature, Speed
Call, or Line Appearance keys. See Feature Keys for personal key
programming instructions.
Personal Keys can be programmed as Feature Keys (such as Swap key) by
you or by your Administrator.
Your telephone also features for feature access, an alphanumeric liquid
crystal display (LCD) with contrast control, Handsfree operation, and a large
Message Indicator.
Note: When using the SuperKey, press Backup softkey to back up one
menu level.
Your SUPERSET 4150 may be connected to a PC. See your system
administrator for computer-telephony features that may be available to you
if your telephone has been connected in this way.
IMPORTANT NOTE FOR HEADSET USERS:
Mitel Networks Headsets with Feature Control Switch (PN9132-800-500-
NA/9132-800-501-NA) must be installed in the dedicated headset jack (the
jack nearest the front of the phone). Installation will disable your handset
microphone. Disconnecting the headset at the jack or at the quick-
disconnect plug restores handset operation.
Telephone status indicators
When line is the indicator is
Idle Off
Busy On
Ringing Flashing slowly
On hold at your phone Flashing rapidly
On hold at another phone Flashing slow on/fast off