363-206-305
Circuit Pack Descriptions
Issue 3 June 2000
7-13
Detailed Description of Operation
7
The ECC2 USPNL provides the following interfaces for the DDM-2000
FiberReach wideband shelf:
■
Alarm and Status LEDs:
—Critical Alarm
— Major Alarm
— Minor Alarm
— Power Minor Alarm
— Alarm Cutoff
— Abnormal
—Power On - A
—Power On -B
— Near-End Activity
— Far-End Activity.
Each Power On LED on the ECC2 user panel is driven directly by one of
the
−
48 V power feeds. All other LEDs are controlled by the SYSCTL.
■
ACO/LED Test Button:
— The ACO/LED test button is monitored by the SYSCTL.
■
Power Interfaces:
— The ECC2 user panel contains filters and replaceable fuses for two
−
48 V power feeds.
■
CIT Interface:
— The ECC2 user panel has a CIT interface which provides a
connection between the CIT and the SYSCTL.
Figure 7-5 provides an overall block diagram of the ECC2 user panel.
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