Cisco ASR 903

IRIG-BRS-485DescriptionDirectionStandard
DB-9
Pin
NCRxD-DSRInputDSR6
IRIG-B+TxD+RTSOutputRTS7
NCRxD+CTSInputCTS8
NCNCUnused or Ring—NC/GND9
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 38: RJ45 Pinout
IRIG-BRS-485DescriptionDirectionStandard
DB-9
Pin
NCRxD+
(RS485)
Ready to
send
InputRTS1
NCRxD- (RS485)DTRInputDTR2
NCNCTransmitInputTxD3
GndGndSignal
ground
—GND4
GndGndSignal
ground
—GND5
IRIG-B (RS232)NCReceive dataOutputRxD6
IRIG-B- (RS485)TxD-DSROutputDST7
IRIG-B+
(RS485)
TxD+CTSOutputCTS8
Twisted Pairs are: 1-2, 3-6, 4-5, 7-8.
Note
Cisco ASR 903 and ASR 903U Aggregation Services Router Hardware Installation Guide
173
Troubleshooting
RJ-45 Connector Pinouts