Cisco Systems Cisco 12416, Cisco 12816 - page 62

Chapter 1 Product Overview
Alarm Card, Line Card, and Rout Processor Overview
1-36
Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide
OL-11495-01
The following LEDs on the front panel indicate traffic status and port selection
(Figure 1-19):
• LINK, EN, TX, RX—Indicate link activity (LINK), port enabled (EN), data
transmission (TX), and data reception (RX).
• PRIMARY—Indicates which Ethernet port is selected (ETH 0 or ETH 1).
Note Because both ports are supported on the PRP, ETH 0 is always on. ETH 1
lights when it is selected.
Figure 1-19 Port Activity LEDs—Partial Front Panel
PRP Auxiliary and Console Ports
The auxiliary and console ports on the PRP are EIA/TIA-232 (also known as
RS-232) asynchronous serial ports. These ports connect external devices to
monitor and manage the system.
• The auxiliary port—A (male) plug that provides a data terminal equipment
(DTE) interface. The auxiliary port supports flow control and is often used to
connect a modem, a channel service unit (CSU), or other optional equipment
for Telnet management.
• The console port—A (female) receptacle that provides a data
circuit-terminating equipment (DCE) interface for connecting a console
terminal.
RX
TX
PRIMARY
SLOT-1
SLOT-0
LINK
EN
RX
TX
ETH 1ETH 0
LINK
PRIMARY
EN
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