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91-000020-021-000-E2520 Manual-ENG.qxd
Appendix
Alert tones and indicator lights
Indicator lights
IN USE
On when the phone is off hook.
Flashes when a parallel set is in use.
Flashes following ringing cadence
during ringing.
2/13/1950
Alert tones
"Beep-Beep-Beep-Beep-Beep"
(5 quick beeps)
"Beep"
(Single beep)
"Beeeeeeeeep"
(1 long beep)
"Beeeeeeeeep"
(1 long beep)
SPARE BATTERY
CHARGING
On when spare batteries in the
On when the handset
base are in charging mode.
batteries are charging
in the base cradle.
Flashes when alkaline batteries
are detected.
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Handset battery is low. Place handset in
base to charge the battery.
Handset registration or programming
command successfully completed.
The handset is out of range. Move closer
to the base.
Error tone (current operation has been
unsuccessful; try again).
NEW MESSAGES
Flashes when new
messages are waiting.
MUTE
On when base
microphone is muted.
SPEAKER
On when speakerphone
is in use.
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