RJ-45 E&M Connection Pin-outs
The following table shows the PRIMARY, SECONDARY and OUTPUT port pin assignments. The
OUTPUT port Audio Out signals on pins 1 and 2 are switched between PRIMARY and
SECONDARY port based on the PRIMARY port PTT (E1) input on pin 4. The two right most
columns show the OUTPUT signals when PRIMARY PTT input is OPEN and SHORTED to GND.
PRIMARY
RJ45
RJ45
OUTPUT
PRI PTT (E1) Open
OUTPUT
PRI PTT (E1) GND
Audio In (R1)
1
1
Audio Out (R2)
Audio Out (R1)
Audio In (T1)
2
2
Audio Out (T2)
Audio Out (T1)
Audio Out (R)
3
3
Audio In (R)
Audio In (R)
PTT In (E1)
4
4
PTT Out (E2)
PTT Out (E1) GND
SG/EB (GND)
5
5
SG/EB (GND)
SG/EB (GND)
Audio Out (T)
6
6
Audio In (T)
Audio In (T)
M
7
7
M
M
SB/MB
8
8
SB/MB
SB/MB
SECONDARY
RJ45
Audio In (R2)
1
Audio In (T2)
2
Audio Out (R)
3
PTT In (E2)
4
SG/EB (GND)
5
Audio Out (T)
6
M
7
SB/MB
8
7
