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Troubleshooting
Pi n
8
9
Note
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.
RJ-45 Connector Pinouts
The table below summarizes the pinouts for each serial interface type when using an RJ-45 connector.
Table 30: RJ45 Pinout
Pi n
1
2
3
4
5
6
7
8
Note
Twisted Pairs are: 1-2, 3-6, 4-5, 7-8.
Standard
Direction
Description
DB-9
CTS
Input
CTS
NC/GND
Unused or Ring
Standard
Direction
Description
DB-9
RTS
Input
Ready to
send
DTR
Input
DTR
TxD
Input
Transmit
GND
Signal
ground
GND
Signal
ground
RxD
Output
Receive data
DST
Output
DSR
CTS
Output
CTS
RS-485
IRIG-B
RxD+ (
NC
NC
NC
RS-485
IRIG-B
RxD+ (RS485)
NC
RxD- (RS485)
NC
NC
NC
Gnd
Gnd
Gnd
Gnd
IRIG-B
IRIG-B (RS232)
(RS232)
TxD-
IRIG-B- (RS485)
TxD+
IRIG-B+
(RS485)
Cisco ASR 907 Router Hardware Installation Guide
RJ-45 Connector Pinouts
177
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