
Local Headset
The local headset connector is a standard 4-pin XLR. A male
XLR is used for Telex devices and a female XLR is used for RTS
devices. Figures 11-2 and 11-3 show the wiring diagrams for each
headset configuration.
4-Wire
The 4-wire intercoms use a standard 6-pin modular jack (RJ-11)
for connectivity. The 4-wire intercom uses two pairs of wires to
support one full-duplex audio channel. One pair for sending
balanced audio, and one pair for receiving balanced audio. It is
important to ensure that the cables are wired correctly for proper
system operation. Refer to Figure 11-4 for the 4-wire 6-pin wiring
diagram.
Auxiliary Input
The auxiliary input jack is a combination jack. It will accept either
a 3-pin XLR or ¼" (6.3mm) plug. The expected input is a
balanced line level input. Refer to Figure 11-5 for the wiring
diagram of the auxiliary.
NC
AUDIO IN +
AUDIO OUT +
AUDIO OUT -
AUDIO IN -
NC
PIN 6 5 4 3 2 1
NC = NOT CONNECTED
Figure 11-4
4-Wire Wiring Diagram
2
3
GROUND
- AUDIO
+ AUDIO
SLEEVE
RING
TIP
1
Figure 11-5
Auxiliary Wiring Diagram
11-2
(1) Microphone
Shield (-)
(2) Microphone
Audio (+)
(3) Headphone
High (+)
(4) Headphone
Low (-)
Telex Units
RTS Units
(4) Headphone
Low (-)
(3) Headphone
High (+)
(1) Microphone
Shield (-)
(2) Microphone
Audio (+)
PUSH
Figure 11-2
BTR-240 Headset Wiring Diagram
(1) Microphone
Shield (-)
(4) Headphone
Low (-)
(3) Headphone
High (+)
(2) Microphone
Audio (+)
(1) Microphone
Shield (-)
(2) Microphone
Audio (+)
(4) Headphone
Low (-)
(3) Headphone
High (+)
Telex Units
RTS Units
PUSH
Figure 11-3
TR-240 Headset Wiring Diagram
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