Indicator Leds; Power Led; Ring Generator Led - Cisco VCO/4K Mechanical Assemblies

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3.2 Indicator LEDs

There are two LEDs on the front of the power supply module; the power LED on the left side,

and the Ring Generator LED on the right side. Refer to Figure 5.

The power LED is on the upper left side of the power supply module. When illuminated, it is

either green or red.

•

Green indicates that the power is on and operation is normal.

•

Red indicates a voltage failure although the interlock switch is closed and the power is

on.

Replace either the fuse or the power supply module. Refer to Section 7.2 for information

on the fuse, and Section 6.1 and Section 6.2 for power supply module removal and

replacement steps.

•

Red could also indicate that you failed to install the external jumper needed for single-

line feed DC operation (refer to Table 2).

•

When the LED is off, or if it glows a faint red (reduced illumination), the interlock

switch is open (power to the module is turned off).

The Ring Generator LED is on the upper right side of the power supply module. When

illuminated, it is either green or red.

•

Green indicates that a ring generator is installed and working correctly.

•

Red indicates a ring generator failure.

•

When the LED is off, there is no ring generator present in that power supply module.

Power Entry Module

VCO/4K Power Subsystem 1-7

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