4.3 Identifying Tones
User Manual 159
When Going Off-hook

Dial Tones

Tone 1

Normal

Tone 2

Any of the following features is
set:
Absent Message
Background Music
(BGM) (proprietary
telephone [PT] only)
Call Forwarding
(FWD)
Call Pickup Deny
Data Line Security
Do Not Disturb (DND)
Extension Lock
Hot Line (single line
telephone [SLT] only)
Message Waiting (PT
only)
Remote Extension
Lock
Timed Reminder
[Czech Republic only]

Tone 3

When going off-hook
with an SLT that has
messages waiting
When Account Code
Entry is performed
When answering a
call from Timed
Reminder

Tone 4

A new voice message has
been recorded (Built-in Voice
Message [BV]).

Tone 5

The remaining voice message
recording time is less than 5
minutes or 125 voice
messages have been recorded
(Built-in Voice Message [BV]).
1 s
1 s
1 s
1 s
1 s
1 s