COMMUNICATIONS-APPLIED TECHNOLOGY ICRI, Инструкция по установке и эксплуатации

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Theory of Operation
In simplest terms, the ICRI performs two primary functions:
• Distributes audio received from one two-way radio to other radios, telephone or recording
device connected to the ICRI.
• Utilizes this same incoming audio to “key” the other radios connected to the ICRI.
This configuration of the ICRI is design to be quickly set-up, and operate for extended periods
without additional power sources or specialized support equipment.
Within each are the interconnect cables to link radios and telephones. Commercial radios---
both portable and mobile radios--- can be rapidly linked together to form radio communications
“nets” of radios that could not otherwise communicate with one another. Military radios, and
satellite “phone” and voice-over-IP devices can be linked to the 2-way radios to extend the
command and control capabilities of the personnel on-scene and at remote locations.
The ICRI will operate for at least 24 hours, with 8 “AA alkaline batteries (somewhat less in
cold weather). The ICRI can also be powered by an external battery pack, a vehicle-supplied or
other DC source, or AC.
Two, three, four, five radios can be linked together through the ICRI. Unencrypted radios can
be link in one talk group while encrypted can be linked in the second talk group. Talk group
selection is controlled by the switches about each radio “port”.
Two ICRIs can be rapidly linked together without hand tool and/or adjustments. An
interconnect cable may be part of this kit or is readily available.
A 250’ extension cable for radio interface may be supplied with this kit. The extension cable
permits a radio to be placed at this distance from the ICRI. This may useful when connecting
to a satellite antenna/radio or when a team enters a structure/tunnel. Multiple extension cable
can be connected for even greater distances .
The ICRI does not discriminate or evaluate the incoming audio so that delays are not inserted
into the audio transfer or “keying” processes. Radios, telephones and/or recording devices
connected to the ICRI are provided with the incoming essentially in real-time (an initial delay
at keying to preserve the first syllables of incoming audio as the transmitters [including wide
area, repeater-based “trunked” radio systems] are keyed up).
An ICRI contains up to six circuits that key the radios connected to the ICRI; these circuits are
commonly referred to as “VOX” or “voice-activated switches.” The ICRI uses these circuits to
perform other controlling functions as well. Only the VOX directly connected to the incoming
audio is used to key each of the other radios simultaneously (all other are temporarily disabled,
preventing a second “voice” from causing a disruption in initial voice being distributed).