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APPENDIX
C:
ICRI
OPTIONS
250’ and 500’ Radio Extension Interface (Cable Reel) P/N: 179.6214 and 179.6211
Positioning one or more of the radios, to be connected to the ICRI at a distance greater than the
length of the interface cable may be desirable for one of several operational reasons:
1.
The personnel associated with a radio will be located inside a building for which there is
poor RF coverage from the ICRI’s location.
2.
The personnel associated with a radio will be located inside a tunnel or other below grade
area for which there is poor RF coverage from the ICRI’s location.
3.
Radios operating in very close proximity to one another, negatively affect the
performance of other another, such as receiver desensing.
The personnel—equipped with compatible radios—in the same general location of the reel-
mounted radio, will be able to communicate with those operating radios or the handset also
connected to the ICRI.
The extension cable is inserted between the ICRI and the radio interconnects cable that is usually
connected directly to one of the radio ports on the ICRI front panel.
NOTE: Multiple reels of cable can be linked together for requirement of greater distance than
250 feet. There will be no degradation of the communications link for up to 5000 feet of cable,
BUT it is important to note that if the cable is run near a source of high electrical energy,
“noise” from such a device can be expected to be induced into the cable and reduce---possibly
significantly---the quality of the communications.
It is strongly recommended that the radio link be tested before the personnel enter the area of
poor RF propagation, so that any defects with the cable or the connections will be noted before a
safety issue arises--due to a lack of radio communications
FIGURE 15: CABLE-REEL CONNECTOR
