1-5
Cisco 1760 Modular Access Router Hardware Installation Guide
78-13342-03
Chapter 1 Cisco 1760 Router Overview
Ports and LEDs
System LEDs
The system LEDs, described in
Table 1-3
, confirm the presence of power to the
router, basic router functionality, and the presence of packet voice data modules
(PVDMs) and Virtual Private Network (VPN) modules.
Ethernet LEDs
The Ethernet LEDs show network activity and status on the Ethernet port. These
LEDs are described in
Table 1-4
.
Table 1-3
System LEDs
LED Label
Color
Description
PWR
Green
On when DC power is being supplied to the router.
OK
Green
On when the router has successfully booted up and the
software is functional. This LED blinks during the
power-on self-test (POST).
See
Table 3-1
in the
“Troubleshooting”
chapter for
how to use this LED in router diagnostics.
PVDM 0 OK
Green
On when a packet voice data module (PVDM) is
correctly inserted in PVDM card slot 0.
PVDM 1 OK
Green
On when a packet voice data module (PVDM) is
correctly inserted in PVDM card slot 1.
MOD OK
Green
On when a VPN module is present.
Table 1-4
Ethernet LEDs
LED Label
Color
Description
ACT
Green
Blinks when there is network activity on the Ethernet
port.
COL
Yellow
Blinks when there are packet collisions on the local
Ethernet network.
FDX
Green
On—Ethernet port is operating in full-duplex mode.
Off—Ethernet port is operating in half-duplex mode.
