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Cisco - Connecting a Terminal to the Console Port on Catalyst Switches

Connecting a Terminal to the Catalyst 5000

Supervisor Engine I and II Console Port

The port is located on the Supervisor Engine front panel and is labeled "CONSOLE," as shown above.

The console port is a data communications equipment (DCE) DB-25 male receptacle that supports a

DCE EIA/TIA-232 interface. Both Data Set Ready (DSR) and Data Carrier Detect (DCD) are active

when the system is running. The Request To Send (RTS) signal tracks the state of the Clear To Send

(CTS) input. The console port does not support modem control or hardware flow control.

Note: If you need a replacement console port accessory kit for your Supervisor Engine I or II, the part

number is ACS-2500ASYN=. This is the same kit that ships with many other Cisco routers, including the

Cisco 2500 series.

Use a null-modem cable to connect the switch to a remote DCE device, such as a modem. For more

information on accessing a Supervisor Engine I remotely, see

on Catalyst

Switches. Use a straight-through cable to connect the switch to a data terminal equipment

(DTE) device, such as a terminal or PC.

Figure: EIA/TIA-232 DB25 Adapter Cable Connectors

Table D-1: Supervisor Engine I & II Console Cable Pinouts 25 PIN Straight Through Cable

Switch Console (DCE)

2 Rxd

3 Txd

4 RTS

5 CTS

6 DSR

7 GND

8 DCD

20 DTR

Table D-2: Supervisor Engine I & II Console Cable Pinouts 25 PIN - 9 PIN Adaptor Cable

http://www.cisco.com/warp/public/473/9.html (8 of 19) [9/4/2003 12:36:03 PM]

Terminal (DTE)

2 TxD

3 RxD