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Installing the 9400-Series Telephones
E-2 September 1995 Issue 1
NOTE:
The 3BIC and 3BEW protectors can be used
only
for 2-wire installations.
They
cannot
be used for 4-wire installations.
These telephones are
not
for residential use. They are for business systems
applications only. Use in a residential environment could result in an electrical
short circuit when the telephone wiring is set up to provide other applications, for
example, for appliance control or power transformers. The AC power used in
these applications may create a safety hazard by placing a direct short circuit
across the telephone wiring.
Wiring Information
The 9403 and the 9434 telephones work in both 2-wire and 4-wire configurations.
The 9410 telephone works
only
in the 2-wire digital communications protocol
(DCP) configuration. Wiring is also discussed in Chapter 9, "Install and Wire
Telephones and Other Equipment".
Figure E-1 and Figure E-2 show an enlargement of a telephone 8-pin line jack in
a 2-wire and a 4-wire configuration, respectively. Table E-1 below these figures
describes the pins on this jack.
Figure E-1 shows power requirements in a 2-wire installation. Switch connections
must be on pair 1 (Pins 4 and 5).
Figure E-1. A Telephone Line Jack in a 2-Wire Configuration
Figure E-2 shows power requirements in a 4-wire installation. Switch connections
must be on pair 2 (Pins 1 and 2) and pair 3 (Pins 3 and 6).
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