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Cisco Metro 1500 Series Hardware Installation Guide
78-10588-03
Chapter1 Product Overview System Modules
LR1
Solid green
Blinking green
Data is receivedfrom a local port. Data rate matches clock
frequency.
Local port is enabled.
Solid yellow
Blinking yellow
Data is receivedfrom a local port. Data rate does not match
clock frequency and the local clock is unlocked.
Local port is disabled.
LT4 Green Data is transmitted to a local port.
LT3 Green Data is transmitted to a local port.
LT2 Green Data is transmitted to a local port.
LT1 Green Data is transmitted to a local port.
R/T
Green Data is transmitted to the remote end of the link, or the
remote laser is forced on.
Blinking
yellow/red Remote laser is forced on while local loop is activated.
R/T Flashing green ALS1 occurred when the green LED flashes every
10 seconds.
R/T
R/R Yellow Local loop is activated.
R/R Green Data is received from the remote end of the link. Data rate
matches the clock frequency.The remote transmitter from
the remote end of the link and the remote receiverfrom the
local end are synchronized
Yellow Datais received from the remote end of the link. Data rate
matches the clock frequency, but the remote transmitter
from the remote end of the link and the remote receiver
from the local end are not synchronized.
ERR Solid red
Blinking red An error has occurred.
Card initialization or local loop is activated or the remote
laser is forced on.
1. ALS = automatic laser shutdown
Table1-8 TDM4E LED Descriptions (continued)
Label Color Description