1-11
Cisco 12404 Internet Router Installation and Configuration Guide
OL-11636-01
Chapter 1 Product Overview
Route Processors
Asynchronous Serial Ports
The two asynchronous serial ports on the GRP allow you to connect external
devices to monitor and manage the system. The ports are a console port and an
auxiliary port.
The console port is an Electronics Industries Association/Telecommunications
Industry Association (EIA/TIA)-232 receptacle (RS-232 female) that provides a
data circuit-terminating equipment (DCE) interface for connecting a console
terminal.
Note
EIA/TIA-232 was known as recommended standard RS-232 before its acceptance
as a standard by the EIA/TIA.
The auxiliary port is a EIA/TIA-232 plug (male) that provides a data terminal
equipment (DTE) interface. The auxiliary port supports flow control and can be
used to connect a modem, a channel service unit (CSU), or other optional
equipment for Telnet management (
Figure 1-2
GRP Console and Auxiliary Port Connections
S
LO
T-0
S
LO
T-1
C
O
LL
LIN
K
T
X
R
X
R
J-4
5
M
II
R
E
S
E
T
AU
X
E
JE
C
T
H10735
Modem
Console terminal
Auxiliary
port
DB-25 female
DB-25 male
Console
port
GRP
todd.book Page 11 Tuesday, November 27, 2007 6:02 PM