COMMUNICATIONS-APPLIED TECHNOLOGY ICRI Manual

COMMUNICATIONS-APPLIED TECHNOLOGY
11250-14 Roger Bacon Drive Reston, VA 20190
Voice: 800-229-3925 Support: [e-mail] REV.S, 4/10
Setup and Operating Procedures
ICRI™
Incident Commanders’ Radio Interface™
A Rapidly Deployable, Radio Interoperability Solution
MANUFACTURED BY
COMMUNICATIONS-APPLIED TECHNOLOGY CO., INC.
RESTON, VA.
CAGE CODE: 0EEY2
http://www.c-at.com
If you have any questions, please contact:
C-AT TECHNICAL SUPPORT at 800-229-3925 (voice), 703-471-4428 (fax), or
e-mail to [e-mail]

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TABLE OF CONTENTS:
THEORY OF OPERATION ....................................................................................................................3
INTEROPERABILITY DOS AND DON’TS..........................................................................................4
PRE-OPERATIONAL ACTIVITIES......................................................................................................5
“RAPID DEPLOYMENT” SETUP AND OPERATION OF THE ICRI.............................................6
SETTING UP THE ICRIFOR USE WITH PORTABLE RADIOS........................................................................... 6
INITIAL SETUP........................................................................................................................................9
POWERING THE ICRI..........................................................................................................................11
USING “AA”BATTERIES TO POWER THE ICRI......................................................................................... 11
USING AN ALTERNATE DC SOURCE TO POWER THE ICRI. ....................................................................... 13
USING AN AC SOURCE TO POWER THE ICRI........................................................................................... 14
ICRI LOCAL HANDSET.......................................................................................................................15
LAND MOBILE RADIO INTERFACE................................................................................................16
CONNECTING THE INTERFACE CABLE TO THE LMR................................................................................. 16
SETTING THE RADIO TO TRANSMIT THROUGH THE ICRI........................................................................... 18
TROUBLESHOOTING RADIO SETUP........................................................................................................... 18
USING A NEXTEL™PHONE IN DIRECTCONNECT™MODE....................................................................... 19
ICRI PHONE LINK................................................................................................................................20
LAND-LINE PHONE LINK SETUP................................................................................................................ 20
USING A CELLULAR TELEPHONE.............................................................................................................. 21
USING THE SAT PHONE JACK................................................................................................................. 22
ICRI TO ICRI LINK...………………………………………………………………………………….23
APPENDIX A: ICRI OPTIONS.............................................................................................................24
CONNECTING EXTERNAL SPEAKERS ....................................................................................................... 24
250’ RADIO EXTENSION INTERFACE (CABLE REEL)P/N: 179.6213........................................................ 25
Set-up of the cable-reel....................................................................................................................... 26
ICRIUNIT IDENTIFIER ............................................................................................................................ 29
APPENDIX B: CONNECTOR PIN-OUT DATA.................................................................................30
APPENDIX C: ICRI APPLICATIONS.................................................................................................31
APPENDIX D: ICRI CHASSIS..............................................................................................................33
APPENDIX E: PART NUMBERS FOR ICRI, ACCESSORIES AND CABLES.............................34
APPENDIX F: ICRI BOARD ADJUSTMENTS..................................................................................36
APPENDIX G: FCC 15.21 INFORMATION TO USER:....................................................................38

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Theory of Operation
In simplest terms, the ICRI performs several primary functions:
•Distributes audio received from one two-wayradio to other radios, telephone or recording deviceconnected to
the ICRI.
•Utilizes this same incoming audio to “key” the other radios connected to the ICRI.
•Permits the connected radios to be placed into one of two “nets”/talk groups. Talk group selection iscontrolled
by the switches about each ICRI radio jack.
•May emit in a specified interval a pre-recorded voice message identifying the unit/ICRI.
•May be remotely controlled for a “all call” messages and to disable the interoperation of the communications
devices connected to the unit/ICRI
•May expand number of interconnected agency radios by a physical link between two units/ICRIs
The ICRI is designed to be quickly set-up, and operate for extended periods without additional power
sources or specialized support equipment.
Two, three, four, five radios can be linked together through the ICRI. Within each “kit” are the interconnect
cables to link radios and telephones. Talk group selection is controlled bythe three-position switches above
each radio “port”.
•Up to five portable radios, and required interconnect cables willbe supplied with the “kit” (other portableand
mobile radios can also be connected).
•A cable may be supplied to connect a Nextel ‘phone in “Direct Connect” mode can also be linked to the 2-way
radio communications nets.
•A land-line telephone can be connected to the radios; no special cable is required.
•Unencrypted radios can be linked in one talk group, while encrypted can be linked in the second.
•Military radios, and satellite “phone” and voice-over-IP devices can be linked to the 2-wayradios with cables
that can be supplied.
The ICRI will operate for 24+ hours, with 8 “AA” alkaline batteries (somewhat less in cold weather). It can
also be powered by an external battery pack, vehicle-supplied or other DC source, or AC.
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 beconnected for even
greater distances.
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 directlyconnected to the incoming audio is usedto keyeachof
the other radios simultaneously (all other are temporarilydisabled, preventing a second “voice” from causing
a disruption in initial voice being distributed).
There is no discrimination or evaluation of 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 essentiallyin real-time (an initial delayat keying topreservethe first syllablesof
incoming audio as the transmitters [including wide area, repeater-based “trunked” radio systems] are keyed
up).

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INTEROPERABILITY DOs AND DON’Ts
These “universal” rules will help to ensure that the part of communications interoperability will work
properly.
1. Maintain COMSEC when forming interoperability bridges.
2. Verifythat only one interoperabilitybridge in the area is using the radio frequencies that you will be
using.
3. Audio and RF cables should be separated from AC power cables by12” (use an external DC source
or batteries when you can’t maintain the separation).
4. When plugging in two or more radios within the same radio band (i.e. VHF) into a radio bridge, like
the ICRI, provide as much vertical separation as possible to reduce the chanceforinterferencedueto
the transmitted signal from one radio reducing the receive sensitivity of the other “in band” radios.
Consider using external mobile antennas connected to the radios if necessary. Use only bridge
interconnect cables that are well shielded.
5. Some bridge cables contain in-line, audio amplifiers for radios designed withlow audio levels. It is
best to rout those cables awayfrom radio antennas and connectors---lots of RF and distort the audio
amplifier’s output to the bridge.
6. Don’t use “SCAN” mode for anyradios connected to a radio bridge. This is particularlyimportant
when you are using the bridge as a tactical repeater, where two or more radios have similar channel
programming. If both radios are capable of hearing the same signal, they will key each other up
"ping-pong", interfering with the function of the bridge.
7. When using a remote device to control an interoperabilitybridge, verifyconfiguration of talkgroups
with on-scene commander. Do not change talk groups settings without confirmation from local
personnel to avoid inadvertently removing necessary personnel from radio traffic.

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PRE-OPERATIONAL ACTIVITIES
Some pre-planning is necessary to ready the ICRI for use. The following should be accounted for before
placing the ICRI on-line:
1. Determine what the power source will be for the ICRI and verify that the cable or battery pack is
available.
2. Predetermine what brand and model of radios will be connected to the ICRI and that an
“interconnect” cable for each radio is available.
3. Agencies must be advised that theywill need to supplya “spare” radio, for theradio interoperability,
that the radio supplied must be known to operate properlyand have at leastonefullychargedbattery.
The ICRI can be powered by the battery pack (8 “AA” batteries) provided or another DC source up to 20
VDC. The LEDs on the ICRI provide information batterystatus, in particular, a reliable indication of alow
voltage condition.
Note: If eight “AA batteries are used, the ICRI will continue operate to nominally for at least 2 hours
after the “OK” LED is extinguished and the “LOW” LED has lit and then extinguished (batteries will
provide a reduced duty cycle due to low quality, poor storage conditions before use, and/or low
temperature during use).
Among the other power sources that can be used to power the ICRI are:
•12 or 24 volt vehicle battery
•Vehicle cigarette lighter
•115VAC (with an external adapter)
•Commercial dry-cell battery (12V or greater)
•C-AT 12 volt battery pack (uses 8 “AA” batteries)
•BA590 “military”
The internal regulated power supply of the ICRI is both reverse polarity protected, but it is important to
check polarity of DC supplies before connecting them to the ICRI.
Note: The ICRI power input connector information appears on the bottom of the ICRI and in the
Appendix.

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“RAPID DEPLOYMENT” SETUP AND OPERATION OF THE ICRI
Setting up the ICRI for use with portable radios.
1. Place all Talk Group switches in the TG position.
2. After connecting a power source to the ICRI, turn on the ICRIso that power upandinputvoltagecan
be verified. The green LED, labeled “OK” should be lit.
If you need to use a DC source voltage between 6.5 and 7.4 volts, then neither the OK nor the LOW
(voltage) LEDs will be lit, but the ICRI will be working.
3. Connect the handset to the ICRI jack labeled “HANDSET”.
4. Connect the radio interface cables to the ICRI jacks labeled “1” through “5”.
All five ICRI radio interface connections (1-5) are electrically identical, so it is not important which
jacks are used for conventional, trunked, repeated, encrypted or mobile radios during ICRI
operation.
5. Connect the radio interface cables to the radios.
6. Verify that the radios are on the channels assigned to the interoperability/bridging function.
7. Select the Talk Group assignment for each radio, and place the switch above the associated jack in
the designated Talk Group position.
The TG position of the switch places any itemconnected withtheassociated portinto “NO CONNECTION”
conduction without physically disconnecting the device from the ICRI.
8. Turn on the radio connected to the jack labeled “1”and initiallyplace the radio volume controls at a
mid-position between fully counter-clockwise and fully clockwise.
9. Place the handset Talk Group selector switch in the same Talk Groupas theradioconnectto jack“1”
so that you can transmit on that radio. You will also be able to monitor that radio.
10. As a radio connected to the ICRI receives voice for a remote radio user for the first time, adjust the
radio’s volume control so that the associated LED, above the jack, flickers as words are spoken. The
LED should not remain on continuously as the voice is received.
11. Repeat 9 and 10 for each radio connected to the ICRI
12. Connect the telephone, if it will be used.
13. Select the talk-group the telephone and/or handset will be associatedwith. Place the telephone in the
“OFF HOOK” position.
Refer to Appendix C for detailed telephone interface application.

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ICRI Front Panel
FIGURE 1: FRONT PANEL
TALK GROUP SWITCH: A
The talk group switches determinewhichcommunications devices will be connected/interoperate each other.
Only the radios, telephone, or handset connected to a specific talk group will hear or be able to transmit
audio to the other individuals connected to that talk group. The switch corresponds to the interface jacks
below it. Radios/interfaces DO NOT need to be turned off or disconnected to switch talk groups.
UP: Talk Group 1
CENTER: Not connected to either talk group
DOWN: Talk Group 2
VOICE ACTIVATED CIRCUIT (VOX) LED INDICATOR: B
Each LEDis associated with a voice communications port (radio, telephone). When the port receives audio
from the radio or other connected device, the LED will light as the audio is received at the ICRI circuitry.
The LED should light as each word is spoken. To adjust the level of the incoming audio, adjust the volume
control of the device connected to the ICRI.
RADIO INTERFACE JACK (1 thru 5) C
The five radio interface jacks on this unit are a 5-pin, 180olocking jacks. All radio jacks are compatible with
a military and commercial radios and Nextel™Direct Connect™phones (except Blackberry and i60/i90
models)
Pinout:
1- Ground
2- Audio from radio
3- Audio to radio
4- Motorola® Saber/AstroSaber P-T-T enable
5- P-T-T Enable (except Motorola Saber and Motorola P Series Radios)

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HANDSET TELEPHONE INTERFACE JACK: D
This interface jack can be used to connect the ICRI to a satellite telephone, land-line or cellular phone. The
8-pin locking-type jack supports the connection of the ICRIto a telephone through the acoustic coupler (PN
1790.650) or the 2.5mm jack on a cell phone (PN 179.0672)
Pinout:
1- Audio TO telephone (acoustic coupler)
2- Audio FROM telephone (acoustic coupler)
3- Audio TO telephone (acoustic coupler)
4- Audio FROM telephone (acoustic coupler)
5- Ground
6- Required jumper
7- Audio TO telephone (2.5mm plug)
8- Audio FROM telephone (2.5mm plug)
VOLUME ADJUSTMENT E
Volume knob onlyadjusts the volume output level at a handset or headset connected to the ICRIat“handset
Interface” jack. To adjust the volume of the radios, use the volume adjustment on the individual radios.
HANDSET INTERFACE JACK F
This 5 pin 240 degree connector supports the handset (p/n 280.0125) or C-AT headset.
Pinout:
1- Ground
2- Electret Mic
3- PTT
4- Audio Hi+
5- Audio Hi-
RED OK/ LOW VOLTAGE LED: G
This red LED indicates the input voltage is 7.5 to 8.5 volts. Once this light is illuminated the ICRIwillhave
approximately 2 hours of run time.
Note: If neither is lit, the ICRI will operate on voltage as low as 6.5V Maximum input voltage is 20VDC.
GREEN OK/ LOW VOLTAGE LED: H
This Green LED indicates the input voltage 8.6 or greater. If battery power option is used, the ICRI will
have approximately 24 hours of run time at full duty cycle.
ON-OFF SWITCH – TWO POSITION (when ICRI not equipped with “Bridge ID”): I
This switch is used to turn the ICRI“ON” and “OFF”. There is no delaybetween “POWER ON” and radio
link.
ON-OFF SWITCH - THREE POSITION (when ICRI is equipped with” Bridge ID”): I
This switch serves three functions. It is used to turn the ICRI “ON” and “OFF” and turn to the BRIDGE ID
ON and OFF. There is no delay between “POWER ON” and radio link.
Up: Unit and BRIDGE ID ON
Center: OFF
Down: Unit ON, BRIDGE ID OFF
POWER INPUT JACK: J
Power jack is used to connect ICRI batterypack, alternative DC power source (vehicle) and AC power. The
Power jack is an 8-pin locking jack. Align arrow at top of ICRI to properly insert the power jack. To
remove, gently pull on the connector at the base.
Pinout:
1 - +7 to +20 VDC
2 - Ground
3 - thru 8- No connection
NOTE: Thisconnector is not a twist lock. Attempting to twist the connector will result in thedisassembly
of the connector and not the removal of the connector from the jack.

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INITIAL SETUP
The Pelican case will appear as in FIGURE 2 with radio interface cables located in the front recess.
Additional cutouts are provided for the storage of an extra battery pack, and for the positioning of radios
during ICRI operations.
A storage compartment for cables and batteries is located at the rear of the pouch. (The internal strap
prevents the ICRI from falling through the open zippered compartment.)
Abbreviated set-up instructions are printed onto the top cover of the ICRI assembly. Connector information
for radio, telephone, and power interconnect cables is printed on the bottom of the ICRI assembly.
FIGURE 2: ICRI CASE (INSIDE) DRY ERASE COMMAND BOARD LOCATED BEHIND FOAM

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FIGURE 3: INTER-AGENCY COMMUNICATIONS STATUS BOARD "WHITE BOARD"
The Inter-AgencyCommunications Status board is located behind the foamonthetopofthePelican™ case.
This board is to be used only with dry erase markers to indicate which agencies are connected to the ICRI
and each other during an incident. A dry erase marker and eraser are included in the ICRI kit.

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POWERING THE ICRI
The following instructions provide three different methods of powering the ICRI.
•8 “AA” batteries
•Alternate DC power source (vehicle)
•AC power
Using “AA” batteries to power the ICRI.
FIGURE 4: BATTERY INSTALLATION
Hold the batteryhousing securelyin the palm of the hand with metal batteryterminal plate facing up. Push
firmly on the center of the battery terminal plate, until the battery tray is released.
Remove old batteries and discard properly.
Replace the 8 "AA” alkaline batteries, observing polarity markings within the tray.
Note: There is a “key” tab on the side of the tray and a “keyway” inside of case.
To reinsert the tray, make sure the tray’s key goes in the matching slot side of the case, Insert the tray into
the housing from the bottom end of the case, pushing the tray until it “locks” into place.
To reinstall the assembled battery pack onto the adapter, align the slots on the top of the battery pack with
the slide rails on the adapter. Slide the batterypack onto the adaptor until it “locks”in placeandtheedges of
the battery pack are aligned with the edges of the adaptor.
The battery housing is comprised of two parts; the exterior case and an internal tray.
NO TOOLS ARE NEEDED TO REMOVE THE TRAY AND REPLACE THE BATTERIES.

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FIGURE 5: BATTERY ATTACHMENT TO ICRI
FIGURE 6: BATTERY CASE
(INTERIOR)
FIGURE 7: OPTIONAL BATTERY CASE AND ADAPTER

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Using an alternate DC source to power the ICRI.
When powering the ICRI with an alternate DC source or through a vehicle cigarette lighter jack, the cable
assembly consists of three subassemblies:
(A) the universal interconnect cable,
(B) the cigarette lighter plug/ locking in-line jack and
(C) the alligator clips/locking in-line jack.
After selecting the DC source connect the in-line jack to the in-line plug. Note that the pins are polarized
and the connection is made so that the jack’s locking “blades” slide between the“blades” onthe plugandthe
body of the plug.
Connect the assembled cable to the external DC source.
Connect the adapter’s plug to the jack labeled DC INPUT.
Note: Align the plug’s “key” with the jack’s “keyway” before attempting to insert the plug.
To remove the plug, hold the fluted part of the plug’s barrel and pull straight out.
To separate the in-line socket, gently lift one of the blades from the plug so that the locking mechanism is
released. Then pull the plug and socket apart.
FIGURE 8: DC POWER SUPPLY SUBASSEMBLIES
FIGURE 9: IN-LINE PLUG ASSEMBLY

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Using an AC source to power the ICRI.
This power supply consists of two parts:
(A) the three-prong AC power cable and
(B) an AC to DC converter with an interconnect cable.
Note: The AC supply must not be used where the cables or converter can become wet.
Connect the power cord to the converter and to the AC source (110-120V, 60Hz).
Connect the adapter’s plug to the jack labeled DC INPUT.
Note: Align the plug’s “key” with the jack’s “keyway” before attempting to insert the plug.
To remove the plug, hold the fluted part of the plug’s barrel and pull straight out.
FIGURE 10: ICRI WITH EXTERNAL POWER SUPPLY

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ICRI LOCAL HANDSET
This handset can be used as a local incident command radio or a troubleshootingdevice. Upto 250’of cable
maybe added to the cable length. The handset may also be replaced with a C-AT provided headset and
connected in the same manner.
Setting up the handset
Plug the handset into the jack labeled “HANDSET”. Make sure to properly align the pins of the connector
before inserting into the jack.
After the plug is fully seated on the jack, the locking ring on the plug should be turned clockwise until the
ring cannot be turned further.
The audio level to the handset speaker can be adjusted by the rotating the volume knob above the jack.
Counterclockwise decreases the audio level, and clockwise increases the listening level.
Set the audio level to mid position.
Select the talk group you will be listening/talking to and set three-position-switch above the handset.
The handset microphone is enabled when the push-to-talk bar in the center of the handset is depressed and
held down.
To remove the connector for cable storage, push inward on the locking ring and turn the ring counter
clockwise to release the locking mechanism. Then pull the connector straight out of the jack. Hold the
chrome barrel of the connector rather than the cable.
FIGURE 11: ICRI AND HANDSET

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LAND MOBILE RADIO INTERFACE
NOTE: Radio interconnect cables are generally specific to a radio brand and model, although some
manufacturer’s use the same connector for several radio models.
Interconnect cables provided by C-AT have a seven digit part number label on the cable.
Connecting the interface cable to the LMR.
NOTE: Once the interface cable is connected to the radio, you will be unable to hear audio from that
radio or use the mic.
Install the radio-end of the ICRI interconnect cable onto the radio, as you would install any radio accessory
(i.e.: a shoulder speaker / microphone).
Tightening anylocking screws is optional; but it is important that the connector befirmlyseated against the
radio so that good electrical contact is made.
Attach the other end of the cable to anyof the LAND MOBILE RADIO INTERFACE jacks, labeled 1, 2, 3,
4 or 5.
NOTE: The plug on the cableand the jack are “keyed”. Be sure to align the key beforeinsertingtheplug
on to the connector or the connection may be damage
FIGURE 12: ICRI INTERFACE JACKS AND TALK
GROUP SELECTOR SWITCHES
FIGURE 13: RADIO WITH ICRI INTERFACE
CABLE

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After the plug is fully seated on the jack, the locking ring on the plug should be turned clockwise until the
ring cannot be turned further.
FIGURE 14: JACK ASSEMBLY
To remove the connector for cable storage, push inward on the locking ring and turn the ring counter
clockwise to release the locking mechanism. Then pull the connector straight out of the jack. Hold the
chrome barrel of the connector rather than the cable.

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Setting the radio to transmit through the ICRI.
Set the audio level on each connected radios to mid-position.
NOTE: Some adjustment of volume position may benecessary toclarify radiosound, aftermid-positionis
established.
Set the radio to the desired channel.
Select the talk group you will be listening/talking to and set the rotary switch above the handset
Because the ICRI is connected to the radio via the speaker jack, the audio path on the attached radio is
disrupted. You will be unable to hear or speak through that radio. If you can hear or talk through the radio,
the cable may not be properly attached to your radio.
The LED directly above the radio will light as audio is transmitted from the radio through the ICRI.
Troubleshooting radio setup.
NOTE: See Page 4, INTEROPERABILITY DOs AND DON’Ts.
Connect the local handset to the jack on the front of the ICRIlabeled, HANDSET. The jack on the handset
is similar to those provided for the radio cables. The handsetconnectorcontainsmorepins andis designedto
be the only cable used in the HANDSET jack.
After connecting the handset, set the volume knob to mid position, set the talk group switches (located
directly above the corresponding radio connection) to the same position as the other radios being used.
Depress the P-T-T bar on the inside of the handset to speak. The LEDs directlyabove the radio ports in use
should light. If they remain solidly lit, turn down the volume. If the LEDs do not light:
Slowly increase the volume settings.
Check to make sure the cable is solidly connected to the radio and the ICRI.
Make certain the radio has a charged battery.
Check if the radio can function normally with a speaker mic attached.
FIGURE 15: HANDSET INTERFACE JACK

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Using a Nextel™ phone in DirectConnect™ mode.
When connecting a Nextel™, connect the phone as you would an L-M-R.
Install the radio-end of the ICRI interconnect cable onto the accessoryjack atthe bottomof thephone, as you
would install any accessory (i.e.: a shoulder speaker / microphone).
NOTE: At this point, the speaker and mic of the Nextel have been disabled, you will be able to
communicate through the handset if both are connected to the ICRI and on the same talk-net.
Attach the other end of the cable to any of the LAND MOBILE RADIO INTERFACE jacks.
Set the Nextel into “DirectConnect” mode and program the desired Nextel “talk group” or DirectConnect
number.
Program the phone to stay in DirectConnect™ mode (See Nextel™ manual for directions).
Audio received from the other connected radios/accessories, will be retransmitted through the Nextel™
DirectConnect™ to the selected “talk group” and any DirectConnect’s will be retransmitted to the other
connected radios/accessories.
NOTE: Some adjustment of volume position maybe necessaryto clarify radiosound, aftermid-positionis
established
FIGURE 16: ICRI CABLE FOR NEXTEL™
FIGURE 17: RADIO JACK CONNECTION FOR NEXTELTM DIRECT CONNECT™

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ICRI “P-O-T-S” Phone Link (POTS=Plain Old Telephone System)
This interface permits the ICRI and anyof the communications devices connect to the ICRI to be connected
and telephone (cell, land-line, unsecure/secure) with a detach-able handset or a 2.5mm jack. The ICRI’s
“RJ22” jack accepts the male end of an analog or digital handset coil cord. An alternative is C-AT part
number 179.0672 that connects to cell and satellite phone with 2.5mm headset jacks.
Land-line phone link setup
NOTE: Initially, do not remove the telephone’s handset from its cradle
During initial setup, place the TalkGroup selectswitches forboth theTELEPHONE and HANDSETin a
Talk Group not being used by any radios.
Disconnect the coiled cable from the telephone’s handset; do not disconnect the cable from the base of the
telephone.
Plug the cable directly into the jack on the side of the ICRI; the jack is labeled “TELEPHONE”
After the plug is fullyseated on the jack, set telephone’s earphone audio to a mid-level settingfollowingthe
telephone’s instructions---this function is not available on all telephones.
After the interconnect cable from the ICRI is connected to the telephone handset, remove the telephone’s
handset from its cradle. A dial tone should be heard in the earpiece of the "local" handset.
Dial the telephone number of another telephone.
When the called party answers, use the ICRI handset and begin to converse with called party.
When the connections is deemed to be working properly, then placethe TELEPHONETalk Group switch in
a group with the radios needing this radio-telephone “bridge.”
FIGURE 18: RJ22 AND RJ45 PORTS
ON RIGHT SIDE OF ICRI
FIGURE 19: ICRI CONNECTED TO PHONE THROUGH RJ-22
NOTE: The RJ22 jack and the telephone interface jack on the front of the unit will not function
simultaneously. Use only one at a time.
NOTE: If a land-line, cellular telephone or satellite telephone will be linked through the ICRI to the 2-
way radios, the “acoustic coupler” interconnect cable (part number 179.0650) can be used.