TruLink Frequently Asked Questions

How do I get started using the TruLink hardware I just received?

• Check the configuration on the back of TPT unit - TruLink® is available in different configurations that dictate operation and functionality of the unit such as:
  • Menu Selection
  • Headset Impedance and Voltage setting
  • Functionality of VOX and PTT operation
• Review the applicable Quick Reference Guide (QRG) for your configuration. The QRG will give describe the basic operation of the unit. QRG's come with the TPT's or are downloadable from the TruLink Website
• Install Batteries - The TPT takes three AA batteries
• Plug-in the correct headset for your configuration into the TPT
• Turn-on the TPT by simultaneously depressing the up and down volume buttons for 3 seconds
• The units are set to default "Channel 1"
• Use the menu button to set one of the TPT's as the "Master". See Basic Set-up and Operation Guide for further detail.
• You should now be able to communicate between TPT's. Adjust the volume using up and down buttons as needed.

How is TruLink different from other radios?
TruLink is a wireless full-duplex intercommunication system where multiple users can simultaneously talk. Other radios are simplex communication systems where only one person can talk at a time. Full Duplex offers a natural communication environment where users can have an interactive conversation and always have the ability to convey critical commands. Simplex communication requires that only one person talks at a time and others must wait for the channel to "clear" before they can talk. "Stepping" on others is a common problem with simplex communication where two users try to talk at the same time.

What is the range of TruLink?
800 meters line-of-sight.

What is the battery life of the TruLink TPT?
Telephonics specifies battery life under continuous operation (continuous transmission of voice) Battery life is 8 Hrs minimum. Alkaline batteries typically achieve 12 hour.

What type of batteries does the TPT use?
TruLink TPT's utilize standard AA Alkaline or NiMH (rechargeable) batteries.

What are my battery recharging options?
The basic TPT's can be charged with a TruLink Support Station. However, rechargeable NiMH batteries can be removed from the TPT and charged using a standard commercial charger.

Do I require a license to operate TruLink?
No. TruLink operates at <100mW in the license-free band of 2.4GHz /P>

Does TruLink utilize 802.11 protocol?
No. TruLink utilizes a proprietary spread-spectrum frequency-hopping protocol.

Are there interference problems with the commonly used 2.4GHz frequency band?
TruLink® is very robust and provides reliable intercommunication even in saturated 2.4 GHz environments. This is accomplished through advance forward error correction and by dropping interferening frequencies from the communication channel hop-set.

Is TruLink communication encrypted?
AES encryption is an available option. A Type I encrypted variant of TruLink will be available in 2009. Currently available TruLink® provides a proprietary spread-spectrum frequency-hopping protocol.

How many TPTs can you operate on one channel?
Up to 31 TPT's can operate on a single channel with up to 6 TPTs realizing full duplex communication at one time.

How many different channels or independent nets can I have
50 channels or independent nets

What are the temperature operating limitations on the system?
The operating temperature is -40C to +55C

What type of Headsets can be used?
TruLink® supports Electret and Dynamic headsets. Current manufacturer in the headset library includes Peltor, David Clark, Gentex, Racal and Sordin. A user define headset profile is provided to build customized headset.

What is a TruLink configuration and why are there different configurations?
Configuration determines how the TruLink® operates, menu functions and the default headset that can be used with the TPT.

Can TruLink operate as a stand-alone system?
Yes. TruLink® is ideally suited for stand-alone operation because any one of the Transceivers can select to be a Master to create an independent network.

How do I interface to a wired Intercommunication system?
TruLink® provides a portable and a permanent interface solution to a wired ICS system.

Portable Solution - The portable solution uses a Dual Port TPT with an ICS interface cable to connect to the headset port of a crew station. This Dual Port TPT acts as the "wireless bridge" to the wired ICS system. All crew station settings will then have wireless access.

Permanent Solution - The permanent solution uses a TAP to interface to the wired ICS. With the correct impedance matching the TAP can connect to the crew station headset port or to a spare radio port. The TAP can also function as a complete ICS system that interfaces with up to three Radios. Telephonics provides connector information for integrators to install the TAP. Telephonics offers installation services upon request.

Can I get access to Long Range Radios that are connected to the wired Intercommunication system?
Yes. Since TruLink® typically connects to the headset port of the crew station, the setting on the crew station directs the audio.

How do I change volume?
Use the Volume up/down arrow key.

How do I change settings, as there is no display on the unit?
Respond to the appropriate voice prompt when scrolling through the menu.

What does the service contract include and how long does it last?
One year warranty. No service contract.

How long will a TruLink® to wired ICS integration mod take?
Depends on whether it is a permanent or portable solution. Permanent solution will require wiring changes that needs inspection and approval. A Portable solution mod is simply disconnecting the long cord and connecting the TruLink® which takes ~ 5 minutes.

The TruLink® Support Station (recharging station) requires 120VAC 60Hz power. Foreign plugs require 220VAC 50Hz power. Are modified Support Stations available?
No.

Where is the TruLink® Access Point (TAP) mounted on the aircraft?
The TAP is for a permanent solution. Can be mounted anywhere there is no obstruction with the antennae. Army Blackhawk mounts it in the ceiling.

What is the power output on use?
100 mW maximum The TAP requires 28Vdc and draws less that 500mA.

What is the transmission range?
2600 feet line of sight. 100 mW maximum

Can two aircraft talk on the same channel?
Depending on the application, yes, but only one aircraft or vehicle could be the master of the network. It is desirable that each aircraft or vehicle is assigned its own channel.

After system is installed, is creating a network a user level task?
Yes.

Can the TruLink® Access Point (TAP) be installed in multiple aircraft and portable transceivers be shared between them?
Yes. Each TAP or Master in the network can have up to 30 portable transceivers logged on.

Does the system, other than the TAP, need to be connected to anything in the aircraft?
The TAP (permanent Solution) or the DPT (Portable solution) is the only TruLink® system connection to the Aircraft. The connection is typically to a crew station in place of the long cord.