Cisco Systems 1500 manual TDM4E LEDs, LR4

Chapter 1 Product Overview

System Modules

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.
	Solid green	Data is received from a local port. Data rate matches clock
		frequency.
LR4	Blinking green	Local port is enabled.
	Solid yellow	Data is received from a local port. Data rate does not match
		clock frequency and the local clock is unlocked.
	Blinking yellow	Local port is disabled.
	Solid green	Data is received from a local port. Data rate matches clock
		frequency.
LR3	Blinking green	Local port is enabled.
	Solid yellow	Data is received from a local port. Data rate does not match
		clock frequency and the local clock is unlocked.
	Blinking yellow	Local port is disabled.
	Solid green	Data is received from a local port. Data rate matches clock
		frequency.
LR2	Blinking green	Local port is enabled.
	Solid yellow	Data is received from a local port. Data rate does not match
		clock frequency and the local clock is unlocked.
	Blinking yellow	Local port is disabled.

	Cisco Metro 1500 Series Hardware Installation Guide
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