IRIG-B
RS-485
Description
Direction
Standard DB-9
Pin
NC
RxD
DSR
Input
DSR
6
IRIG-B+
TxD+
RTS
Output
RTS
7
NC
RxD+
CTS
Input
CTS
8
NC
NC
Unused or Ring
NC/GND
9
Twisted pairs are 2-5, 6-8, 4-7.
Note
The X.21, V.35, RS-485, EIA-449, EIA-530, and IRIG-B standards are not currently supported by software.
Note
RJ-45 Connector Pinouts
The table below summarizes the pinouts for each serial interface type when using an RJ-45 connector.
Table 26: RJ45 Pinout
IRIG-B
RS-485
Description
Direction
Standard DB-9
Pin
NC
RxD+ (RS485)
Ready to send
Input
RTS
1
NC
RxD- (RS485)
DTR
Input
DTR
2
NC
NC
Transmit
Input
TxD
3
Gnd
Gnd
Signal ground
GND
4
Gnd
Gnd
Signal ground
GND
5
IRIG-B (RS232)
-
Receive data
Output
RxD
6
IRIG-B-
(RS485)
TxD-
DSR
Output
DST
7
IRIG-B+
(RS485)
TxD+
CTS
Output
CTS
8
Twisted Pairs are: 1-2, 3-6, 4-5, 7-8.
Note
Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide
128
Troubleshooting
Serial Interface Modules Pinouts