Specifications

FOM-E1/T1 Ver. 2.0 Standalone FOM-E1/T1 A-1
Appendix A
Pinouts
A.1 Standalone FOM-E1/T1
Balanced RJ-45 Connector
A balanced E1/T1 interface terminates in an RJ-45 connector. Table A-1 describes
the RJ-45 connector pinout.
Table A-1. RJ-45 Connector Pinout
Pin Designation Function
1 Send Data (TTIP) Transmit Data, A-wire
(FOM-E1/T1 output)
2 Send Data (TRING) Transmit Data, B-wire
(FOM-E1/T1 output)
4 Receive Path (RTIP) Receive Data, A-wire
(FOM-E1/T1 input)
5 Receive Path (RRING) Receive Data, B-wire
(FOM-E1/T1 input)
DB-9 Alarm Relay Connector
The 9-pin D-type female connector on the rear panel connects to the major and
minor alarm relay.
Table A-2 describes the DB-9 connector pinout.
Table A-2. DB-9 Connector Pinout
Pin Contact Alarm Type
2, 6 Normally Closed
1, 6 Normally Open
Minor
5, 9 Normally Closed
4, 9 Normally Open
Major
The relay positions are shown in the non-energized (alarm active) state.