Comtech EF Data SDM-9220 - Manual (Page 131)

Universal E&M/PTT Interface Card
Memotec Inc. 9-3
The following table describes the RJ-45 pinout for an E&M/PTT port.
To connect this cable:
1. Connect one end of the cable to the RJ-45 connector on the interface card.
2. Connect the other end to the RJ-45 connector on your equipment.
As an alternative, you can cut it off and punch on a Telco/PTT block termination.
NOTE: You must install a ferrite on each cable connected to an E&M/PTT port
on an SDM-9220 or SDM-9230 (both UAC and DC models) in all coun-
Pin No. Usage Description
1 V
Isolated and current limited voltage source output
(+24V or +48V or -24V or -48V)
2 M Control Signal In
3 R1 Voice In (Transmit Ring)
4 R Voice Out (Receive Ring) two-wire connection
5 T Voice Out (Receive Tip) two-wire connection
6 T1 Voice In (Transmit Tip)
7 E Control Signal Out
8 G
Ground return of isolated and current limited voltage
source
Table 9-1: RJ-45 pinout for the Universal E&M/PTT interface card
Figure 9-1: RJ-45 Pinout (female jack) for Universal E&M/PTT Interface Card