Verifying the installation
External connection status LEDs
The TX 4000 board provides LEDs to indicate the status of the trunk interfaces. The
location of the LEDs is shown in the following illustration:
Trunk 1
(and Trunk 3 if applicable)
Trunk 2
(and Trunk 4 if applicable)
Green status LEDs
Trunks
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The TX 4000 board end bracket has one green LED for each trunk. The trunk LEDs
provide the following indications:
LED Description
Off Trunk has not been configured.
Slow blinking
green
Indicates loss of signal.
Fast blinking
green
Indicates loss of frame or loss of signaling multiframe.
Steady green Indicates that proper frame synchronization between the trunk and network has been
established. All required framing alignment has been found.
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