DRA-34 RJ45 Pinout:

Pinout shown as you are looking into the open end of the RJ45 female socket on the DRA-34.
Orientation is - contact pins are up and the locking tab slot is down.
The pinout follows standard EIA Ethernet.

 12345678
 ________
|''''''''|
|        |
|__    __|
|__|__|__|

1 = RX Audio

2 = TX Audio - source channel selected by JU3 (Left or Right)

3 = PTT

4 = COS - Not normally used - (AllStar hardware COS input when JU1 is installed)

5 = CTCSS - Not normally used - (AllStar hardware CTCSS input when JU2 is installed)

6 = Ground

7 = Ground

8 = Ground


Header - Jumper Summary:

JU1 - Install this jumper to enable AllStar Link COS - Remove for Digital. 
JU2 - Install this jumper to enable AllStar Link CTCSS - Remove for Digital. 
JU3 - Selects between the "L" Left Audio Output or  "R" Right Audio Output.
JU4 - Install this jumper to disable PTT LED falsing protection.


R12 (the larger blue pot) controls the receiver audio level.

By default, we recommend NOT installing the jumpers on JU1 and JU2 for VARA FM 
or other digital mode usage.  

Detailed explanation of these headers and jumpers:

JU1 and JU2 - AllStar Link COS and CTCSS logic inputs:
The hardware COS and CTCSS inputs (used for AllStar Link) are not needed for 
VARA FM or other digital modes. In fact, if something is connected to the COS 
and CTCSS (Windows Volume UP and DOWN pins) bad things can happen with digital 
programs. In addition, DCD (XDC) and/or other logic or control lines might be 
connected in existing installations using the KPC-3 or similar TNC. These functions
affect pins 4 and 5 on the RJ45. These pins can be disabled by the absence of 
the "JU" jumpers at locations JU1 and JU2. As such, even if these pins are tied 
back to the radio somehow, it won't matter - their existence won't affect the 
operation of the DRA-34 for digital use. Jumpers can be installed into locations 
JU1 and JU2 to restore the AllStar Link functionality.

Plus, these hardware inputs may be implemented sometime in future software - permitting 
DCD or some other digital feature, so I didn't want to limit the hardware from 
being able to use them in the future. 


JU3 - LEFT or RIGHT Channel TX Audio Output Selection
Left and Right channel audio is available on the DRA-34.  You can select which 
one feeds the transmitter by the position of JU3.  L is for Left and R is Right.
R14 adjusts the Right channel TX audio and R16 adjusts the Left.

JU4 - False PTT LED illumination protection:
Jumper JU4 is removed to enable this illumination protection.  The jumper can be 
placed if this option should it create a problem for a particular installation. 
The jumper simply shorts out the diode.

Why is JU4 necessary?
Partial (or full) illumination of the PTT LED can happen if the radio adapter is
connected to a radio that has a PTT switching voltage (bias) of less than 5 volts.
This is the case with many portable radios.  This situation causes the red PTT LED 
to partially illuminate. This illumination can also happen with just about any radio 
when the radio's power is turned off, falsely making it look like the radio is 
transmitting. Placing JU4 disables the BAT43 diode protection.

By default, we recommend NOT installing the jumpers on JU1, JU2, and JU4.
Additionally - by default JU3 is set to "R".