126
Guide To Tone Patterns
The following table shows the different tone patterns that a caller may hear as a result of different
actions.
Tone Type
Description
Busy Tone
The busy tone is on for 400 ms, off for 400 ms. This tone is generated when
(1) accessing a CO line which is in use, or (2) dialing a busy ordinary (non
key-) phone in either intercom mode or in trying to transfer a CO call.
Key Telephone The key telephone busy tone is on for 400 ms, off for 280 ms, on for 120 ms,
Busy Tone
off for 120 ms, on for 120 ms, then off for 2.016 seconds. This tone is
generated when dialing a busy key telephone in either the intercom mode or
in trying to transfer a CO call.
Ringing Tone The ringing tone is on for 320 ms, off for 280 ms, on for 320 ms, then off for
2.016 seconds. This tone is generated when (1) calling another extension in
the intercom mode or (2) when trying to transfer a CO call to an available
extension.
Flash Tone
The
fl
ash tone is on for 56 ms, off for 32 ms, on for 56 ms, off for 32ms, then
on for 56 ms. This tone is generated when after a phone
fl
ashes during a CO
call. It is also generated as a con
fi
rmation tone for any programming.
Error Tone
The error tone is on for 160 ms, off for 160 ms. This tone is generated when
in many places when a phone dials an incorrect digit or tries to access an
invalid extension or other resource. It is also present during a CO call when the
extension dials a number which is barred according to the Call Barring tables.
Clear The
clear
forwarding tone is on for 1 second, off for 160 ms, on for 80 ms,
Forwarding off
for 160 ms, on for 80 ms, then off for 160 ms, then switching to the
Tone
system dial tone. This tone is generated when the PABX detects, through
the clear forwarding detection or polarity reversal detection, that the far end
caller has hung up.
Wait Tone
The wait tone is on for 64 ms, then off for 240 ms for as long as a resource
is unavailable. This tone is generated when an extension is waiting for an
unavailable system resource.
Alarm Tone
The alarm tone is on for 400 ms, off for 160 ms, on for 80ms, off for 160 ms,
on for 80 ms, then off for 824 ms. This tone is generated when an extension
answers the phone after an alarm clock ring.
Stutter Tone
The stutter tone is on for 80 ms and off for 80 ms, lasting for about 3 seconds.
This tone is generated when a non-key telephone extension picks up the
phone while its “Message Lamp” is lit. This informs the non-key telephone
extension that someone has left it a message.
126
System Ringging - Tones
Chapter
4
- IPS SystemUsed With Ordinary Telephones
