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IC dial tone
Acknowledgment Tone
SSP 518-411 ·100-i01 1978·08 -27:p
OK
OK
Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Oct 15, 2012 2 1 :03:39
TABLE G
DO-NOT - D IS TURB
(DND )
At any station, depress IC button, go
off-hook
Dial
06
Calling stations receive busy tone. Lamp
will flash at DND station but audible
signal is silenced. Call can be answered
or ignored.
ISS 1 , SECTION 5 1 8-4 1 1 - 1 00
Page 27
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