GAI-Tronics ITR2000A Tone Remote Deskset User and Installation Manual - Manual (Page 20)

Installation ITR2000A Tone Remote Desk Set
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Electrostatic Discharge (ESD) Protection
The ITR2000A has ESD protection circuitry that provides a high degree of protection against ESD, and
power and telephone line surges. The circuitry shunts the transient currents to earth ground through the
ground terminal. One of the two screws located on the back of the desk set can be used as an earth
ground terminal. See the rear view of the desk set for the ground screw terminal locations.
The ground terminal must be connected to a high quality earth ground point to obtain maximum
protection. Ideally, the ground point should originate at a 1/2-inch copper rod driven at least 6 feet into
the soil with a No. 16 AWG (or larger) copper wire run to the ground terminal taking the shortest path
possible. Where this is not possible, ground to a nearby water pipe or best available ground.
Equipment Required
Test Equipment
 RF service monitor
 AC voltmeter with dB ranges for measuring audio levels
Documentation
 base station’s tone remote adapter manual
 these installation instructions
Cable Installation Safety Considerations
Interconnecting, communications, and Class 2 dc power cables should be separated from electrical light
or other Class 1 circuits by at least 2 inches. The exception is where Class I wiring or power circuits are
run in a raceway, or are metal-sheathed or metal-clad, or are permanently separated from the conductors
of the other circuitry by a continuous and firmly fixed nonconductor such as porcelain tubes or flexible
tubing in addition to the insulation on the wire. Communications cables and in-building wiring should be
listed and marked for the purpose according to NEC Article 800.
Telephone Line Lightning and Over-Voltage Protection
The ITR2000A Tone Remote Desk Set has an over-current phone line fuse which protects against
occasional extreme fault conditions that may get past the primary protectors. An example of such a fault
condition is a power line cross. If the fuse requires replacement, use only with the same type fuse.
For maximum surge and lightning protection, building primary (over-voltage) protectors should be
installed at the point where the telephone lines enter the radio equipment building. Primary protectors
are usually required by local codes and should be provided by your leased line provider.
Power Connection
Connect the ITR2000A to the listed ac wall transformer, which supplies nominal 12 V dc. Optionally,
the desk set can be powered by other dc sources. The operating range is 10.5 to 16 V dc. Refer to the
power connection pinout on page 5 of the “Description” section.