LEDs and Optics
Page 112 7450 ESS-7
3
(cont)
M/S Ref Master/Slave clocking reference designation:
• Green: Indicates that the SF/CPM is designated as the primary clocking
reference in a redundant system.
• Green (blinking): Indicates that the SF/CPM is operating as the
secondary clocking reference in a redundant system.
• Unlit: Clock not initialized.
Note: The clock is only required for SONET and/or 10GbE WAN
operations.
Timing The Timing LED indicates system status and quality.
• Green: Locked (operational state).
• Green (blinking): Clock in (internal) holdover state.
• Amber (blinking): Clock in free running state. The SR is attempting to
get a lock. When in the free running state, the timing of the SR can drift
and is not reliable. The preferred state is locked.
• Unlit: Clock not initialized.
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.
Table 36: SF/CPM Field Descriptions (Continued)
Key Label/Part Sub
category
Description
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