Things You Should Know DS/ITP-5012L Phone User Guide
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11. Button LEDs
The [Transfer], [Hold] and [Speaker] buttons have an LED that turns on or
off according to the phone status.
y [Transfer] button LED y y y y
LED Status
Steady red Call Forwarding is set on station.
y [Hold] button LED y y y y
LED Status
Flashing red Phone is locked for outgoing trunk line calls.
Steady red Phone is locked for incoming and outgoing calls.
y [Speaker] button LED y y y y
LED Status
Steady red Speakerphone is switched on.
Transfer
Hold
Speaker