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INTERCOM CALL PROGRESS TONES
(Heard through handset
receiver
or over
monitor
speaker)
Dial Tone Continuous on
Called
station ring-back
One sec. on
and 3 sec. off.
I I
Base level 80 msec. tone burst
wwmeW
sounded once
Error tone
- 830
msec. tone burst
inam3ct entry
sounded three times
I
I
I
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All-call and zone paging
80 msec. tone burst
rotificatbn tone
followed by 280 msec.
tone burst
I
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Busy tone
Override feature
not allowed
Nlgnt transfer feature
not allowed
530 msec. tone bursts
sounded continuously
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