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21
INTERCOM OPERATION
Activate custom-
calling services
Line-in-use
lights
Redirect an
incoming call
to any other
874 phone
Automatically
redials a
number when
the line you’re
calling is busy
Announces to
all 874 phones
at same time
Connect another
intercom call with
an outside line
Ring another 874
phone connected to
Line 1
Announce over
the speaker to
the phone you
are calling