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C-2
Cisco ONS 15501 User Guide
78-14134-02, Release 2.0
Appendix C Connector Pinouts
Figure C-1 RS-232 and RJ-45 Connector Pinouts
Pair 1 (pins 1—2): Shorted if LOS exists
Pair 2 (pins 3—4): Shorted if fault exists
Pair 3 (pins 5—6): Shorted if either power supply fails
Pair 4 (pins 7—8): Uncommitted (always shorted)
NC [6]
Request to Send (RTS) [7]
Clear to Send (CTS) [8]
[9]
[2] Receive data (RxD)
[3] Transmit data (TxD)
[4] NC
[5] Ground
[1] NC
RS-232
(DB-9 connector, female)
Alarm out
(RJ-45 connector)
1
2
34
Pair 4
Pair 3
Pair 2
Pair 1
68381