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46 Operation
Wireless Talk-Around Audio Only
These base stations are connected to share WTA channel 1 and
WTA channel 2 audio but do not share the CAN bus data.
Link Overview
WTA 1 and WTA 2 in the BTR-80N are two (2) independent 2-
wire intercom channels. The WTA intercom channels are very
similar to AudioCom types of intercom channels except they are
dry and are meant to only pass audio between BTR-80N base
stations.
Up to 16 base stations may be connected together with base link
cables (BLC) depending on cable length and conductor size.
The BLC passes both channels of WTA audio. It also passes a
logic level so the 1st base station in the chain is the only one that
provides a termination of the WTA intercom channels. This pin
is labeled "TERM CONT" on the RJ-45 plug pinouts in this
section.
Care must be taken to connect cables between base stations
from the OUT of base one (1) to the IN of base two (2) and so
forth, unit to unit.
If the WTA link cable passes from OUT to OUT or IN to IN, the
WTA audio terminates in multiple places and causes the WTA
audio levels to be greatly reduced/distorted.
.
If base stations are farther apart than the 12" (30.48cm) BLC,
then 568-A or 568-B Ethernet cables of CAT-5E or above may
be used to connect base stations up to 300 feet apart. These
Ethernet cables contain four (4) twisted pairs like the BLC
cable.
Multiple base stations connected via 2-wire
FIGURE 66.
audio cable and WTA through via BLCs
BLC (Base Link Cable) and pin functions.
FIGURE 65.
Part Number PRD000223000 (Not Supplied)
BTR-80N, TR-80N, TR-82N
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