Specifications

Installing An OPX Long Loop Adapter With The JM008
You must use an OPX long loop adapter if you wish to adapt the JM008’s IST station port to
support an off-premise IST application. An OPX long loop adapter connects to a single
telephone line and can greatly extend the line’s loop length (the Proctor Model 46222 adapter*,
for example, can extend line length to 30,000 feet).
*Proctor & Associates Company, Redmond WA
CAUTION
When you connect an OPX long loop adapter to an off-premise extension (OPX), you must
install primary protectors in series with the tip/ring pair of the telephone line that is routed to
the OPX. This action is necessary to protect both the user and the equipment from transient
voltage spikes that can travel through the cable. The telephone company offers basic
protection against this condition; however, that protection is usually designed to safeguard the
central office circuits and you cannot rely upon it to protect common equipment. To help
insure that external over-voltage surges do not damage the system, installation specialists
recommend that you install and properly ground gas discharge tubes or similar primary
protection devices on the telephone line that routes between the adapter and the OPX.
To install the OPX long loop adapter:
•
Follow manufacturer’s instructions for unpacking, inspecting, mounting and wiring the
adapter unit.
•
Plug a modular cable into the system jack on the adapter and connect the opposite end of
the cable to the JM008’s station port.
•
Plug a modular cord into the telephone jack on the adapter and connect the opposite end of
the cord to the OPX line.
•
Plug the adapter power cord into a standard 117 VAC, 3-wire electrical outlet.
DSU II Digital Telephone System IMI66–132
Installing The DSU II Digital Telephone System 2 – 47