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Cisco uBR924 Installation Manual page 86

Cable access router
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Console Port Connector and Cables
Table B-3
Console Port (DCE)
Signal
RTS
DTR
TxD
GND
GND
RxD
DSR
CTS
1. The console port does not support hardware flow control, so it does not support nor use the RTS and CTS
signals. To accommodate other devices that use these signals, pin 1 on the console port (RTS) is connected
internally to pin 8 (CTS), so that devices that assert the RTS signal automatically receive the CTS signal
in reply.
The console port is hardwired for 9600 baud, 8 data bits, no parity, 1 stop bit (9600 8N1) and does not
support either hardware or software flow control. If the console port is connected to a laptop computer
or other PC when the Cisco uBR924 is first powered-on, the initial system banner should be displayed
on the computer's console screen. If you do not see the system banner, verify that the laptop's serial port
is set correctly and that it is properly connected to the console port.
By default downloading a Cisco IOS configuration file disables the console port and
Note
erases all previously saved configurations. The Cisco uBR924 cable access router ships
from the factory with the console port enabled, and it remains enabled from the time of
initial power-on until it begins to download a Cisco IOS configuration file.
Cisco uBR924 Router Hardware Installation Guide
B-6
Console Port Signaling and Cabling
RJ-45
RJ-45
Pinout
Pinout
1
1
8
2
7
3
6
4
5
5
4
6
3
7
2
1
8
1
Appendix B
Terminal Port (DTE)
DB-25
DB-9
Pinout
Pinout
5
8
6
6
3
2
7
5
7
5
2
3
20
4
4
7
Connector and Cable Specifications
Signal
CTS
DSR
RxD
GND
GND
TxD
DTR
RTS
OL-0338-01 (3/2000)

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