Mitel 4125 - Manual (Page 5)

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ABOUT YOUR PHONE
The SUPERSET 4125 has ten fixed-function keys ( SUPERKEY,
TRANS/CONF, REDIAL, MESSAGE, HOLD, CANCEL, SPEAKER,
MICROPHONE, , ) 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 display-assisted selection of features, on-hook
dialing, and a large Message Indicator.
Note: When using the SuperKey, press Cancel to back up one menu level.
Your SUPERSET 4125 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 set). 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 set Flashing rapidly
On hold at another set Flashing slow on/fast off