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The RDX Radio Interface

RDX Dynamic View

Intro Text

What's in the box?

The Green-GO RDX radio interface comes with the following package contents:

  • 1 x Green-GO RDX radio interface
  • 1 x Printed quickstart guide
Optional Green-GO accessories
  • Green-GO PoE network switches

Device overview

Front panel

RDX Front Panel

4 Buttons
The four Buttons are used to enter and navigate the setup menu.
4 RGB Status LEDs
The device or channel status is presented by four powerful RGB LEDs.
1 OLED Display
The high contrast, color OLED display presents channel and device information clearly but compactly.

Back panel

RDX Back Panel

1 PoE Powered 10/100 Mbps Neutrik EtherCON
The 10/100 Mbps Neutrik EtherCON serves as power input and connection to the local network.
1 D-Sub 9 Radio Connector
An external radio is connected to the D-Sub 9 connector. Both audio and PTT control are transmitted to the headset connector of any radio.
2 Jumper Switches
The two jumper switches can be used to adjust the physical connection to the external radio.

The user interface

RDX User Interface

The user interface of the RDX radio interface is compact and straightforward:

  1. The user linked to the device is shown on top of the screen.
  2. Currently enabled channels and the input level coming from a connected radio is shown in the middle of the screen.
  3. On the bottom of the screen, the channel(s) receiving communication from the Green-GO network is displayed with the received signal level going to the connected radio.

Interfacing with a radio

The Green-GO RDX radio interface can interface with a broad range of two-way radios.

The device doesn't come with any adapter cables. However, with the connection schemes and pinouts below, you can create a connector cable for the radio type that you wish to use. The cable will connect the D-Sub 9 connector on the back of the RDX interface with the headset connector found on the radio.

Notice: To avoid signal loss, your adapter cable should be shielded and no longer than 1.5 meters.

A correctly build adapter cable is cruical for correct operation. So, to get a better understanding of the following pin-out schemes, it is good to know how the D-Sub 9 pins are actually connected internally:

RDX GPIO Internals

As soon as the RDX radio interface receives audio on any channel from the Green-GO network, a push-to-talk relay is activated that takes care of the keying of the radio. Any audio received via the connected two-way radio is automatically transmitted to any channel using the Autotalk channel mode.

D-Sub 9 pin-outs

RDX GPIO Pinouts

D-Sub 9 Pin Description
1 Audio input (+)
2 PTT relay (normally closed)
3 PTT relay (common)
4 PTT relay (normally open)
5 Audio output (-)
6 Audio input (-)
7 PTT relay (common)
8 Audio output (DC path)
9 Audio output (+)

Adjust the physical connection

RDX Jumper Switches

As seen in the device diagram above, the two available jumper switches on the back of the device can influence how the audio going to the connected two-way radio is transmitted:

Switch 1
Switch 1 acts as an attenuator for the transmitted audio signal.
Switch 2
Enables a path for a DC voltage supplied by the radio.

Example adapter schematics

Kenwood 2-pin K1

Adapter Pin-Outs for Kenwood K1 Connector

Potentially Compatible Devices
TK series
TK-208, TK-220, TK-240, TK-240D, TK-248, TK-250, TK-260, TK-260G, TK-270, TK-270G, TK-272G, TK-308, TK-320, TK-340, TK-340D, TK-348, TK-350, TK-353, TK-360, TK-360G, TK-37, TK-370G, TK-372G, TK-373, TK-430, TK-431, TK-2100, TK-2102, TK-2130, TK-2160, TK-2170, TK-2200, TK-2202, TK-2207, TK-2212, TK-2300, TK-2300VP, TK-2302, TK-2312, TK-2360, TK-3100, TK-3101, TK-3102, TK-3107, TK-3130, TK-3131, TK-3160, TK-3170, TK-3173, TK-3200, TK-3201, TK-3202, TK-3207, TK-312, TK-3230, TK-3230XLS, TK-3300, TK-3300VP, TK-3301E, TK-3302, TK-3312, TK-3360, TK-3400, TK-3402, TK-5320, TK-5400, TK-5401, TK-3401DE, TK-3401DT, TK-3501E, TK-3501T
NEXEDGE series
NX-230, NX-240, NX-3220, NX-3320
Other series
PMR-446, TH-D7AG, TH-D72A, TH-F6A, TH-F7E, TH-G71A, TH-K20A, TH-K21A
UV-5R, UV-3R+, UV-5RE, UV-5R+, 666S, 777S, 888S, BF-V85, UV-3R+, UV-200, UV-100, UV-5R, BF-888S, BF-F8, BF-FF8+, UV-B6, UV-B5, UV-3R, UV-5RA, UV-5RC, UV-6, BF-K5, BF-A5

Kenwood 14-pin K2

Adapter Pin-Outs for Kenwood K2 Connector

Potentially Compatible Devices
TK series
TK-180, TK-190, TK-280, TK-285, TK-290, TK-380, TK-385, TK-390, TK-480, TK-481, TK-490, TK-981, TK-2140, TK-2180, TK-3140, TK-3148, TK-3180, TK-2260, TK-3260, TK-5210, TK-5310
NEXEDGE series
NX-200, NX-210, NX-220, NX-230EX, NX-300, NX-320, NX-330EX, NX-410, NX-411, NX-420

Motorola 2-pin M1

Adapter Pin-Outs for Motorola M1 Connector

Potentially Compatible Devices
CLS series
CLS1110, CLS1410, CLS1413, CLS1450, CLS1450C, CLS1450CB, VL50
CP series
CP88, CP040. CP100, CP110, CP125, CP140, CP150, CP160, CP200, CP250, CP300
CT series
CT150, CT250, CT450, CT450LS
FD-150A, FD-450A, FD-160A, FD-460A
GP series
GP2000 , GP2100, GP300, GP308, GP68, GP88, GP88S
XTN series
XTN446, XTN500, XTN600
XTN XV series
XV1100, XV2100, XV2600, XV4100
XTN XU series
XU1100, XU2100, XU2600, XU4100
XTN AX series
AXV5100, AXU4100
RD series
RDM2020, RDM2070D, RDU2020, RDU2080D, RDU4100, RDU4160D, RDV2020, RDV2080D, RDV5100
RM series
RMM2050, RMU2040, RMU2043, RMU2080, RMV2080
SP series
SP10, SP21, SP50+, SP50
PRO series
PRO1150, PRO2150, PRO3150
P series
P040, P080, P1225, P1225LS
Motorola Spirit series
SV10, SV11, SV11D, SV21, SV12, SV22, SV22C, SU210, SU22, SU22C, SU220 VHF / UHF Spirit, Spirit Pro, Spirit Pro+, Spirit HP 10
Spirit MU series
MU11, MU11C, MU11CV, MU12, MU12C, MU12CV, MU21C, MU21CV, MU22CVS, MU24CV, MU24CVS, MU24CVST
Spirit MV series
MV11, MV11C, MV11CV, MV12, MV12CV, MV21C, MV21CV, MV22CV, MV24CVS
Other series
GTI, GTX, LTS2000, VL130, PMR446, ECP100, Mag One BPR400, EP450, AU1200, AV1200
BC10, BC20, BC90, BC95, BC120, BC130
TC-446S, TC-500, TC-500S, TC-518, TC-580, TC-600, TC-610, TC-618, TC-620, TC-700, TC-700ExPLUS, TC-850, TC-900, TC-1600, TC-2100, TC-3000, TC-3600
XV1000, XU1000, XU100, XV100

Motorola 12-pin M4

Adapter Pin-Outs for Motorola M4 Connector

Potentially Compatible Devices
GP series
GP1280, GP140, GP320, GP328, GP329, GP338, GP339, GP340, GP360, GP380, GP640, GP650, GP680
HT series
HT750, HT1250, HT1250LS, HT1550, HT1550XLS
MTP series
MTP700, MTP850
MTX series
MTX8250, MTX8250LS, MTX850, MTX850LS, MTX9250, MTX950, MTX4500/4550
PRO series
PR860, PRO5150,PRO5350, PRO5450, PRO5550, PRO5750, PRO7150, PRO7350, PRO7450, PRO7550, PRO7750, PRO9150
PTX series
PTX700, PTX760, PTX780

Motorola 13-pin M5

Adapter Pin-Outs for Motorola M5 Connector

Potentially Compatible Devices
EX series
EX500, EX560XLS, EX600, EX600XLS
GL series
GL200, GL2000
GP series
GP338XLS, GP344, GP344R, GP366R, GP388, GP388R, GP638XLS, GP644, GP688
GP Plus series
GP328 Plus, GP338 Plus, GP628 Plus, GP629 Plus, GP638 Plus, GP639 Plus
PRO series
PRO5150 Elite, PRO5151 Elite, PRO7150 Elite
PTX series
PTX700 Plus, PTX760 Plus, PTX800 Plus, PTX860 Plus
TC-610P, TC-780
RPV3000, RPV3600, RPU3000, RPU3300c, RPU3600, RPU7500

Motorola 12-pin M7

Adapter Pin-Outs for Motorola M12 Connector

Potentially Compatible Devices
APX series
APX2000, APX3000, APX4000, APX6000, APX6000XE, APX7000, APX7000L, APX7000SE
DGP series
DGP4150, DGP5050, DGP5550, DGP6150, DGP8050, DGP8550
DP series
DP3400, DP3401, DP3600, DP3601, DP4400, DP4401, DP4600, DP4601, DP4800, DP4801
MTP series
MTP6550, MTP6750
XiR series
XiR P8200, XiR P8208, XiR P8260, XiR P8268, XiR P8600, XiR P8608, XiR P8620, XiR P8628, XiR P8660, XiR P8668
XPR series
XPR6100, XPR6300, XPR6350, XPR6380, XPR6500, XPR6550, XPR6580, XPR7350, XPR7550

Motorola 8-pin M9

Adapter Pin-Outs for Motorola M9 Connector

Potentially Compatible Devices
DEP series
DEP550, DEP570
DP series
DP2000, DP2400, DP2400e, DP2600, DP2600e, DP3441, DP3441e, DP3661e
MTP series
MTP3100, MTP3150, MTP3200, MTP3250, MTP3500, MTP3550
XiR series
XiR P6600, XiR P6608, XiR P6620, XiR P6628, XiR E8600, XiR E8608
XPR series
XPR3300, XPR3500

Tait 9-pin TPB-AA-005

Adapter Pin-Outs for Tait TPB-AA-005 Connector

Potentially Compatible Devices
Tait series
TP3, TP8100, TP9300, TP 9400, TP9500, TP9600

Configure transmitting channels

Depending on your configuration no audio may be tranmitted to your Green-GO network. To change this you need to configure the mode of one or more of the user's channels to Autotalk.

Using the channel mode Autotalk automatically enables a channel as soon as audio from the two-way radio reaches or overcomes the configured Gate threshold.

Setup Menu Guide
Setup Menu
└──> User
     └──> Channels
          └──> Channel ID#
               ├──> ...
               └──> Channel Mode: Autotalk # (1)
  1. Defines the operation mode of the channel

Adjust the PTT behavior

Depending on your situation, adjusting your Green-GO RDX interface's TX mode may be required. By default, a Green-GO RDX interface will activate its PTT relay as soon as a remote Green-GO device opens a channel to the interface (TX mode: TX Talk). This will usually block the radio channel until the channel is closed again and the local Active Time has run out.

Configuring the TX mode to TX VOX will change this behavior and only trigger the PTT relay if actual audio is received from the Green-GO network. Meaning remote Green-GO devices have to overcome their local Gate threshold before activating the PTT relay.

Setup Menu Guide
Setup Menu
└──> Radio
     └──> Output
        ├──> ...
        └──> TX mode # (1)
  1. Defines how the PTT relay is triggered. TX Talk triggers for the complete duration a channel is enabled. TX VOX triggers when receiving actual audio.

The setup menu

Technical specifications


Radio connector

Audio input
Audio output




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