LED Identification

The system's modules have two sets of status LEDs. The top set indicates overall router and module status. The bottom set indicates module-specific status, such as port status (line modules) or fan status (SRP module).

The number next to the port status LED on a line module corresponds to the number of the port on the I/O module. Some line modules have more port status LEDs than the number of ports on the I/O module. In these cases, only the LEDs for the corresponding ports on the I/O modules are active.

For example, an OCx/STMx line module can pair with either an OC3-4 or an OC12/STM4 I/O module. Consequently, the line module has four port status LEDs for OC3/STM1 operation. However, only the top set of port status LEDs IS active during OC12/STM4 operation.

Table 9 lists the functions of the module and port status LEDs.

Table 9: LED Identification and Activity Descriptions

LED Location

LED Label

LED Indicator

LED Color

OFF to ON

ON to OFF

All modules

OK

Module status

Green

Self-test passed

Failure detected

FAIL

Module status

Red

Failure detected

Diagnostic test running

ONLINE

Module status

Green

Module online

Module offline

All modules

REDUNDANT

Redundancy

Green

See Redundancy Status.

NOTE: The REDUNDANT LED on the cOCx/STMx, FE-8, GE/FE, HSSI, and X.21/V.35 line modules is nonfunctional.

SRP module

POWER A OK

Power

Green

Power online on source A

Power off

 

POWER B OK

Power

Green

Power online on source B

Power off

 

FAN OK

Fan

Green

Fan online

Critical fan failure

 

FAN FAIL

Fan

Red

Critical fan failure

Fan online

  

NOTE: When the LED alternates between OK and FAIL at 10-second intervals, a non-critical fan failure exists.

 

LINK

Ethernet

Green

Ethernet link up

Ethernet link down

 

ACTIVITY

Ethernet

Green

Blinks when Ethernet traffic on link

No Ethernet traffic on link

Ethernet line modules

LINK

Ethernet

Green

Ethernet link up

Ethernet link down

ACTIVITY

Ethernet

Green

Blinks when Ethernet traffic on link

No Ethernet traffic

on link

HSSI line module

SYNC

Port status

Green

If the port is configured as DTE, the LED lights when both the DCE and the clock source are available.

If the port is configured as DCE, the LED lights when the DTE is available.

If the port is configured as DTE, the LED goes out when either the DCE or the clock source becomes unavailable.

If the port is configured as DCE, the LED goes out when the DTE becomes unavailable.

YEL ALM

NOTE: This LED is not functional on the HSSI line module.

RED ALM

Port status

Red

If the port is configured as DTE, the LED lights when either the DCE or the clock source becomes unavailable.

If the port is configured as DCE, the LED lights when the DTE becomes unavailable.

If the port is configured as DTE, the LE goes out when both the DCE and the clock source are available.

If the port is configured as DCE, the LED goes out when the DTE is available.

X.21/V.35 line module

ACTIVE

Port status

Green

Port configured

Port not configured

LOOPBK

Port status

Yellow

Port in local loopback or remote loopback, depending on the type of connection.

Port not in loopback

ERROR

Port status

Red

Port is enabled or comes online

Port is disabled or goes offline

V.35

Port status

Green

V.35 cable connected

V.35 cable disconnected

X.21

Port status

Green

X.21 cable connected

X.21 cable disconnected

DCE

Port status

Green

DCE cable connected

DCE cable disconnected

DTE

Port status

Green

DTE cable connected

DTE cable disconnected

Other line modules

SYNC

Port status

Green

In frame

Not in frame

YEL ALM

Port status

Yellow

Far-end receive failure (FERF) exists

No FERF present

RED ALM

Port status

Red

Loss of sync/frame

In frame

The following figures show a representative module for each of the three variations: