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© Tait International Limited February 2021
www.taitradio.com
402-00032-03

TMAA04-06 Cross-band Linking, GPS and 

External Interface Cable

Installation Instructions

 

Notice

The TMAA04-06 cross-band linking, GPS, and external interface cable is 

DMR only. It is 

not

 currently supported by P25 radios.

The TMAA04-06 cross-band linking, GPS, and 
external interface cable is used to extend the 
features available with TM9356 dual radio 
systems. The cable connects to both radio’s 
auxiliary ports so the radio system can be used as a 
cross-band repeater, provides an RJ45 socket to 
connect to a GPS antenna, and also provides an 
external interface connector. The external interface 
can be used to power a TM9356 dual radio system 
on using ignition sense, and also connect to an 
external alert device.

Notice

The radio does not meet the IP54 pro-

tection standard once the auxiliary connector 
rubber bungs have been removed and this cable has been installed. Care must be taken 
when the radio is being operated in an environment where there is water, dust or other 
environmental hazards.

Analog Cross-band Repeater Operation

Cross-band repeater mode allows a TM9356 dual radio system be used as a temporary analog 
repeater. Any activity received on one radio will be automatically transmitted on the other 
radio, and vice versa.

Installation

1. Remove the rubber bung that cover the auxiliary connector on each radio body.

2. Plug an auxiliary connector into the auxiliary port of a radio body.

3. Plug the second auxiliary connector into the auxiliary port of the other radio body.

The cable can be plugged in either way—its orientation has no impact on radio perfor-
mance. However, to reduce the cabling required, orient the cable so the external interface 
connector and GPS socket are closest to the device or devices to connect to.

4. Tightly fasten the jackscrew-type locks.

External 

Interface 

Connector

RJ45 GPS 

Socket

Auxiliary 

Connectors

Summary of Contents for TMAA04-06

Page 1: ...xiliary connector rubber bungs have been removed and this cable has been installed Care must be taken when the radio is being operated in an environment where there is water dust or other environmental hazards Analog Cross band Repeater Operation Cross band repeater mode allows a TM9356 dual radio system be used as a temporary analog repeater Any activity received on one radio will be automaticall...

Page 2: ...grammed the radio user must not enable monitor having the microphone off the hook while entering or during cross band repeater mode The transmit timer if enabled limits the maximum duration of cross band repeater transmissions If a transmit lockout period is programmed then further repeater transmissions will also be inhibited until the lockout timer expires However if a valid received signal is p...

Page 3: ...e transmit valid signals and one radio is receiving an invalid signal such as invalid CTCSS the mute will stay closed and no re transmission will occur However if the other radio then receives a valid signal the radio will attempt to re broadcast this over the other signal Set Tx Inhibit to Busy or Mute to prevent this re transmission occurring System Timing For the cross band repeater to operate ...

Page 4: ...r detailed configuration and programming information contact your local Tait dealer Connecting to the Ignition Signal The cable s external interface connector can be used to connect a TM9356 dual body radio system to the vehicle s ignition signal This will turn the radio system off when the ignition key is off to avoid draining the battery and will turn the radio system on when the ignition key is...

Page 5: ...ty of the radio s auxiliary lines cannot be accessed with this cable That means you cannot connect directly to an external alert device an interface to the external alert such as a controller box must be used Notice The internal pullups normally available from the auxiliary lines are not avail able via this cable If the external alert requires a logic type signal on the output lines the lines must...

Page 6: ...3 RXD receive data 4 AUX_GPI3 ignition sense 7 AUD_TAP_IN audio tap input 8 13V8 power supply to GPS device 9 AUX_GPIO6 external alert 12 AUX_GPI1 PTT input 13 AUD_TAP_OUT audio tap output 15 AGND ground GPS socket pins and signals Pin Signal name Description 1 13V8 power supply from radio 2 GND ground 3 GND ground 5 GPS_TXD transmit data External interface connector pins and signals Pin Signal na...

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