Chassis Features
Page 22 7450 ESS-7
3
(cont)
Reference 1, 2 The Reference LEDs indicate the status and quality of the individual
timing sources.
• Green: Qualified and selected as clock reference input.
• Green (blinking): Qualified but set as the standby clock reference.
• Amber: The reference is enabled (no shutdown) but not qualified.
• Unlit: Not in use, not configured.
3 Building integrated timing supply (BITS) network clocking: Derives
network timing from the central office (CO) BITS.
• Green: Qualified and selected as clock reference input.
• Green (blinking): Qualified but set as the standby clock reference.
• Amber: The reference is enabled (no shutdown) but not qualified.
• Unlit: Not in use, not configured.
Power Supply 1,2,3,4 • Green: Indicates that a power entry module is installed and operational
in the associated slot.
• Amber: Indicates an error condition with an installed power entry
module in the associated slot.
• Unlit: Indicates that a power entry module is not installed or not
recognized.
• Only LEDs 1 and 2 illuminate for the 7450 ESS-7 model.
• In the 7450 ESS-7 model, the power supply LEDs on the secondary
SFM will light similarly to the primary SFM. A fault is indicated in one
SFM if the primary power supply LED and the comparable LED differ.
The SFM should be returned for repair. This may indicate a fault in the
SFM fuse system.
Fan Status
Fan Stat us LEDs
1,2,3 • Green: Indicates that the fan tray is installed and operational.
• Amber: Indicates a fan tray removal or failure.
• Unlit: Indicates that the fan tray is not installed.
• Only LED 1 and 2 illuminate for the 7450 ESS-7 model.
• In the In the 7450 ESS-7 model, the fan status LEDs on the secondary
SFM will light similarly to the primary SFM. A fault is indicated in one
SFM if the primary fan status LED and the comparable secondary LED
differ. The SFM should be returned for repair.
Compact Flash 1,2,3 • Green: Indicates that the flash card is operational and in a read or write
process.
Note: Do not physically remove or attempt to remove the flash card
when the LED is lit green.
• Amber (blinking): Error condition exists.
• Amber (solid): Indicates that the slot is in an operationally down mode.
This is the only mode to safely remove the flash card.
• Unlit: A flash card is not installed in the slot.
Table 5: SF/CPM Field Descriptions (Continued)
Key Label/Part Sub
category
Description
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