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:all waiting tone Three 80 msec. tone bursts
sounded once
.nnn
Zalled station in do-not- 140 msec.tone burst
disturb mode
sounded twice every
1.5 sec.
:all-back busy feature on
260 msec. tone burst
sounded once
1
System is awaiting
80 msec. tone bursts sounded
memory dial number
continuously
or key mapping entry
n
nnn
after location is specified
Override feature on
-
warning tone
Six 100 msec tone bursts
’
sounded for 1.5 sec.
;OHVA tone
USD
ringback tone Dual 440/480
Hz
tone
sounded 1 sec.on/l
set
off
.
c
I
I
c
IISD dial tone
381 Hz tone sounded
continuously
I
IISD confirmation tone Two 125 sec. bursts
of 381 Hz tone sounded once
rISD busy/error tone Three 500 msec. bursts
of 381 Hz tone sounded once