T ELEPHONICS C ORPORATION
TM115007 REV A (04/07) 3-4
USE OR DISCLOSURE OF DATA CONTAINED ON THIS PAGE IS SUBJECT TO THE
RESTRICTION ON THE TITLE PAGE OF THIS DOCUMENT.
C
OMMUNICATION S YSTEMS D IVISION
The audio connectors may be connected to either long-range radios or to a wired ICS through a crew
station headset port. Up to three radios may be connected to the TAP.
When used to interface to a wired intercom system, one TAP audio connector is typically connected
to a headset port of a crew station.
The function of these connectors is dependant on the system’s configuration.
3.3.2.4 Data Connectors
The two data connectors are marked J2 and J4. Connector J2 is used to load and configure the TAP.
It is not a part of routine operation. Connector J4 is not used.
3.4 TAP OPERATION
A TAP is always operated as a MASTER. However, it requires a TPT SLAVE unit to change
channels.
3.4.1 Power ON/OFF
When power is applied to a host vehicle, a connected TAP unit is powered on automatically. The
TAP will always start-up as a MASTER unit on the channel it was previously set to when the vehicle
power was removed. If the channel is unknown, an operator can set the TAP channel using a TPT
SLAVE unit and the Order Synchronize Access Point setting described below. This setting can also
be used at any time during normal operation if it becomes necessary to change the network channel.
3.4.2 Echo Elimination Procedure
This procedure is employed when connecting a TAP to a wired ICS station. This procedure is
provided as a reference only. Due to electrical variations in different manufacturer’s products, the
procedure may need to be altered to achieve acceptable results.
When the TAP is configured for use with a wired intercom system, this procedure must be employed
to eliminate echo in the TruLink system caused by the wired ICS station’s sidetone.
The following procedure usually is required only during a wired system installation or replacement
of a wired system intercom station. However, it can be performed if there is a noticeable echo on a
TPT.
This procedure will eliminate echo on a TPT when a TAP is connected to a wired system.
Set wired system station to intercom selection.
Set wired system station to HOT MIC selection.
Set wired system station volume to approximately 50% setting.
Confirm that no headset is connected to the wired system crew station.
VOX sensitivity set to minimum (if present on crew station ICS)
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