Revision A&B RJ45 Pin Assignments
This table shows the current RJ45 pin numbers in the left hand column and the older Rev B pin
numbers in the far right column. The signal directions are noted in the PRI/SEC and OUTPUT
columns.
This table is included only for reference with products produced prior to
Revision C. Do not use this table unless you are replacing a previous version and
connecting the older PAS cables to a Revision C unit.
Rev C
RJ45
Signal
PRI/SEC OUTPUT
Rev B
RJ45
1
Audio In (R1)
IN
OUT
6
2
Audio In (T1)
IN
OUT
3
3
Audio Out (R)
OUT
IN
5
4
PTT (E)
IN
OUT
7
5
SG/EB (GND)
GND
GND
8
6
Audio Out (T)
OUT
IN
4
7
M
OUT
IN
2
8
SB/MB
OUT
IN
1
Connection details
The PAS was originally designed to be placed in between a Loop channel bank and a transmitter connected
to it via an E&M Card.
Loop Telecom channel banks (V4200, AM3440, O9500, O9550, IP6704A) with 8EM, 8EMA or
QEMA cards
To connect a Loop channel bank E&M card (LEM) to the priority and/or secondary ports of the PAS,
configure the LEM to operate in B-Side mode and connect with the proper RJ45 cable.
To connect to a LEM on the output side port of the PAS, configure the LEM card to operate in A-Side
mode and connect with the proper RJ45 cable.
Since the PAS always uses the “E lead” for PTT indicator and E-Lead PTT is always done via connection
to ground, all E&M types are supported in LEM and will pass through the PAS when the LEM cards are
properly configured for A-side and B-side.
Charles Industries channel banks with 3652-80 and 3652-81 E&M Cards
To connect to a Charles channel Bank E&M card (CIEM), build an RJ45 cable that connects to the specific
pins on the 50 pin Telco connector (or connectors for 3252-80) for the channels that you wish to use.
To connect a CIEM to the priority and secondary ports of the PAS connect the following pins to the pins in
a straight-through fashion. That is M to M, R to R, etc. The pattern is:
Pin 8 to MB, Pin 7 to M, Pin 2 to T1, Pin 6 to T, Pin 3 to R, Pin 1 to R1, Pin 4 to E and Pin 5 to EB
8
