Ericsson LBI-39055 manual Headset Jacks if used, Boom/Gooseneck Mic if used

			LBI-39055
MIC" on the Audio Matrix Board. The desk mic's cable is		"BOOM/GOOSE MIC" on the Audio Matrix Board. Cable
five (5) feet long.		length is four (4) feet.
	NOTE		CAUTION !

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

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 magneticvoice 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.

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