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Chapter 1 Product Overview
System Modules
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Cisco Metro 1500 Series Hardware Installation Guide
78-10588-03
TDM4E LEDs
TheTDM4E LEDs provide information about its operating status. The Gigabit
Ethernet connection is typically equipped on the remote receiver side with a fixed
clock rate of 1250 mbit/s. A complete loss of optical signal on the remote receiver
causes the remote laser to automatically shut down.
Table 1-8 describes the functions of each LED. If the system is operational and all
interfaces are properly connected, all active TDM4E receive and transmit LEDs
are continuously on.
Table 1-8 TDM4E LED Descriptions
Label Color
Description
On Green Power is supplied to the TDM4E.
LR4
Solid green
Blinking green
Data is received from a local port. Data rate matches clock
frequency.
Local port is enabled.
Solid yellow
Blinking yellow
Data is received from a local port. Data rate does not match
clock frequency and the local clock is unlocked.
Local port is disabled.
LR3
Solid green
Blinking green
Data is received from a local port. Data rate matches clock
frequency.
Local port is enabled.
Solid yellow
Blinking yellow
Data is received from a local port. Data rate does not match
clock frequency and the local clock is unlocked.
Local port is disabled.
LR2
Solid green
Blinking green
Data is received from a local port. Data rate matches clock
frequency.
Local port is enabled.
Solid yellow
Blinking yellow
Data is received from a local port. Data rate does not match
clock frequency and the local clock is unlocked.
Local port is disabled.