5.0 Making An Auxiliary Equipment Interface Connection
(Busy Lead Detection)
When needed, connect an industry standard non-electronic telephone device such as a FAX machine, an
industry-standard telephone, or a data device, such as a modem, on a line ahead of the common equipment. The
system will detect an off-hook condition in the connected device and turn on the status light for the line at the
system telephones to indicate that the line is busy.
Each line board makes one auxiliary equipment connection available for use. This connection is at Pair 24 (pin
numbers 49 and 24, clip terminals 47 and 48) and is associated with line 2 of that line board.
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Line Board Connection Block
Pair 24,
Pins 49 and 24,
Clip Terminals 47 and 48
a-lead.cdr
Industry-Standard
Telephone Device
Such As:
FAX, Modem, Model 2500 Telephone, etc.
(No A-Lead Control Required)
Making A Typical Auxiliary Interface Connection
IMI89–266
Installing The Loop Start Line Board
