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LBI-39055
13
MIC" on the Audio Matrix Board. The desk mic's cable is
five (5) feet long.
NOTE
Do not over-tighten the screws on the DB-style
connectors.
Headset Jacks (if used)
At the selected location, secure each headset jack box
(part of option CRCN1W or equivalent) to the mounting
surface using the four (4) #10 thread-forming screws
supplied in the installation kit. Before mounting, verify
adequate clearance is maintained for the headset's plugs. If
using both jack boxes, label them "SUPERVISOR" and
"OPERATOR".
Connect the headset jack boxes to the Audio Tower
using the 6-foot cable supplied. This cable (part number
19C337102P1 supplied with CRCN1W) has male DB-9
connectors on both ends. One end mates with the female
DB-9 connector at a headset jack box and the other end
mates to the female DB-9 connector at the Audio Matrix
Board. Headset connectors at the Audio Matrix Board are
labeled "SUPERVISOR HEADSET" and "OPERATOR
HEADSET". Interconnect the cables accordingly.
NOTE
Microphone priority is (highest to lowest):
• Supervisory Headset Mic
• Operator Headset Mic
• Boom/Gooseneck Mic
• Desk Mic
The boom/gooseneck mic has priority over the
desk mic when no headset is plugged into the
Audio Tower. Desk mic PTTs will be ignored if a
headset is connected to the Audio Tower.
Boom/Gooseneck Mic (if used)
A boom microphone (option CRMC3E or equivalent)
or a gooseneck microphone (option CRMC3F or
equivalent) may be connected to the Audio Tower. Mount
the microphone in accordance with the instructions
supplied. With the gooseneck microphone, the supplied
male DB-9 connector must be soldered to the cable in
accordance with Table 7. Connect the boom/gooseneck
male DB-9 connector to the female DB-9 connector labeled
"BOOM/GOOSE MIC" on the Audio Matrix Board. Cable
length is four (4) feet.
CAUTION !
DO NOT connect a boom or gooseneck
microphone to one of the other DB-9 microphone
connectors on the Audio Matrix Board. Damage to
the boom/gooseneck mic's magnetic voice coil may
occur.
TABLE 7 −− BOOM/GOOSENECK MIC WIRING*
WIRE COLOR DB-9 PIN NUMBER
Black 9
White 5
Shield 1
* Also see the following NOTE.
NOTE
All boom and gooseneck mic connectors (male
DB-9) must have pins 2 and 3 jumpered together
so the sense circuit will be active when the mic is
connected to the Audio Matrix Board.
Boom/Gooseneck PTT and Monitor Switches
(if used)
Boom/Gooseneck PTT and monitor switch input
connections are located at the terminal block labeled "B/G
PTT" and "MON PTT" on the I/O Board. Each input is
wired in parallel at the following points and thus may be
activated from any one of several locations. See the
schematic in the appropriate board's maintenance manual
for specific connector pin-out details:
• B/G PTT input is located at the "B/G PTT" &
"MON PTT" terminal block on the I/O Board, at
the "FOOTSWITCH 2" female DB-9 connector
on the I/O Board, and at the "BOOM/GOOSE
MIC" female DB-9 connector on the Audio Matrix
Board.