Cisco Systems CISCO7201 Manual De Usuario
2-15
Cisco 7201 Installation and Configuration Guide
OL-11364-04
Chapter 2 Installing the Cisco 7201 Router
Connecting I/O Cables
Connecting Console and Auxiliary Port Cables
Note
The console cable kit product number is ACS-2500ASYN.
The Cisco 7201 router has a DCE-mode console port for connecting a console terminal, and a DTE-mode
auxiliary port for connecting a modem or other DCE device (such as a CSU/DSU or other router) to your
router.
auxiliary port for connecting a modem or other DCE device (such as a CSU/DSU or other router) to your
router.
Note
Both the console and the auxiliary ports are asynchronous serial ports; any devices connected to these
ports must be capable of asynchronous transmission. (Asynchronous is the most common type of serial
device; for example, most modems are asynchronous devices.)
ports must be capable of asynchronous transmission. (Asynchronous is the most common type of serial
device; for example, most modems are asynchronous devices.)
The Cisco 7201 router uses RJ-45 ports for both the auxiliary port and the console port.
For console and auxiliary port pinouts for the RJ-45 connector, see
Refer to
for a list of the pins used on the RJ-45-to-DB-25 adapters, used with an RJ-45 cable,
to connect terminals and modems to the Cisco 7201 router. The cable you use may be a roll-over cable
or a straight-through cable.
or a straight-through cable.
A roll-over cable can be detected by comparing the two modular ends of the cable. Holding the cables
in your hand, side-by-side, with the tab at the back, the wire connected to the pin on the outside of the
left plug should be the same color as the pin on the outside of the right plug. If your cable was purchased
from Cisco, pin 1 will be white on one connector, and pin 8 will be white on the other (a roll-over cable
reverses pins 1 and 8, 2 and 7, 3 and 6, and 4 and 5). (See
in your hand, side-by-side, with the tab at the back, the wire connected to the pin on the outside of the
left plug should be the same color as the pin on the outside of the right plug. If your cable was purchased
from Cisco, pin 1 will be white on one connector, and pin 8 will be white on the other (a roll-over cable
reverses pins 1 and 8, 2 and 7, 3 and 6, and 4 and 5). (See
Table 2-2
Pinouts for the RJ-45-to-DB-25 Adapters
Adapter
DTE M/F Pins
1
1.
The female data terminal equipment (FDTE) adapter that is available from Cisco is labeled “Terminal”.
DCE M/F Pins
MMOD Pins
2
2.
The MMOD adapter that is available from Cisco is labeled “Modem”.
1
4
5
5
2
20
6
8
3
2
3
3
4
7
7
7
5
7
7
7
6
3
2
2
7
6
20
20
8
5
4
4