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O R P O R A T I O N
TM115007 REV A (04/07)
4-3
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O M M U N I C A T I O N
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I V I S I O N
4.3.1 ICS
Interface
The Dual Port Transceiver connects to the wired system via an interface cable. This cable is specific
to the type of wired system. Different interface cables are used in various aircraft/vehicles. When
connecting a Dual Port TPT, the crew station must be configured correctly or echo will occur.
Typically, the DPT is the network MASTER. See the correct addendum for your installation.
After the cable is connected and the unit is powered up slave TPTs can be turned on. They will log
on to the master DPT
In order to set up the channel on a Dual Port TPT, the user must plug in the programming cable to the
Headset Port and then connect a headset to the cable. Channel selection is the same as a TPT.
4.3.2
Logging on to a Network
When used for wired intercom system interface, the DPT will always act as a MASTER. Therefore
it will start a network at power-up and will always succeed in the network logon. The Dual Port TPT
should be powered up before any TPTs are turned on. For a description of how to logon a TPT, see
Paragraph 2.7.3.2.
Note
This procedure is provided for reference only.
Due to electrical variations in different
manufacturers products, the procedure may need
to be altered to achieve acceptable results.
When the DPT is configured for use with a wired intercom system, this procedure must be employed
to eliminate echo in the TruLink system caused by the station’s sidetone.
This procedure will eliminate echo on a TPT when a DPT 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.
VOX sensitivity set to minimum (if present on station ICS).
Connect the DPT (using the appropriate aircraft interface cable) to the aircraft.
Confirm no headset is connected to the wired system station.
Insure all other stations are not transmitting on the intercom or have an open MIC. If no
headset is connected to a station, no action is required.
Ensure that the station is receiving no long-range radio audio.
Power up the wired system and the DPT.
Power up a TPT and test for echo by speaking to the wired ICS.