DRAFT 2.0 – COMMERCIAL IN CONFIDENCE
FST DT-5365 Series Installation & Service Manual T/18237 Draft 2.0 Page 18 February 2018
3.8
E&M INTERFACE (RJ45)
E&M (Earth & magneto, ear & mouth, or recEive and transMit) signaling provides the means to remotely
signal and control the radio as well as provide external two-way audio. The E&M Interface has PTT in,
Channel Activity out and 600
Ω
balanced Tx and Rx audio - suitable for connection to, say, a Motorola
MCC7500 VPM Console, an audio bridge, a telephone interconnect unit, a Conventional Channel Gateway
(CCGW) or Audio Management Unit. (AMU).
Pin-outs are shown with respect to the DT-5365.
Pin
Number
Description
Level / Sensitivity
1
PTT IN to FST radio J2 Aux PTT input
Relay normally open
2
PTT IN to FST radio J2 Aux PTT input
Relay common
3
Audio IN to FST radio J2 Accessory connector.
Audio received from the remote equipment and
transmitted to operators listening to the RadioStar FST
Rx audio + (-10dBm nom.)
4
Audio OUT return
Tx Audio -
5
Audio OUT from FST radio J2 Accessory connector.
Audio transmitted to the remote equipment and
received by the operators listening to the remote
equipment
Tx audio + (-10dBm nom.)
6
Audio IN return
Rx audio -
7
Channel Activity OUT from FST radio J2
Relay normally open or normally closed
(Strappable for active high or active
low)
8
Channel Activity OUT from FST radio J2
Relay common