Lucent Technologies FT-2000 OC-48 - Page 292

Circuit Pack Descriptions
7-14 Issue 8.0 July 2002
Office Alarms Interface 7
The SYSMEM circuit pack provides relays for the FT-2000 OC-48
Add/Drop-Rings Terminal and FT-2000 OC-48 Repeater Bay to interface with a
central office alarm grid. The relays are controlled by the microprocessor on the
SYSCTL circuit pack. Relays are provided for audible and visible alarms for:
■ Critical
■ Major
■ Minor.
The normally closed contacts for the critical and major relays provide the alarm
closure if power fails. For more information about the office alarms interface, refer
to Volume I, Section 6, “Operations Interfaces.”
User Panel LEDs and Controls 7
The SYSMEM circuit pack provides the outputs to light the following LEDs on the
user panel:
■ Critical (CR) alarm
■ Major(MJ)alarm
■ Minor (MN) alarm
■ Abnormal (ABN) status
■ Near-end activity (NE ACTY)
■ Far-end activity (FE ACTY)
■ Line locator (LINE LOCTR) display
■ Use CIT (USE CIT).
The SYSMEM circuit pack also accepts the alarm cutoff (ACO) input from the user
panel. For more information about the user panel, refer to Volume I, Section 6,
"Operations Interfaces."