Maintenance strategy
Power interruptions
Maintenance Procedures
29
December 2003
Figure 2: Alarm reporting flowchart
Power interruptions
System cabinets and their associated power supplies can be powered by 110/208 VAC, either directly or
from an uninterruptible power supply (UPS) system. Alternatively, the cabinets and their power supplies
may be powered by a -48 VDC battery power plant, which requires DC-to-DC conversion power units in
the system.
All
major
alarms
All minor
alarms
Some
downgraded
warning alarms
Call to
alarm
receiving system
successfully
completed?
Yes
Yes
No
No
No
Yes
Call retried
in 7 minutes
Fifth retry
attempt?
One
hour wait
Has
test been
repeated
six times?
New
alarm
raised?
Yes
Every timer
and count is
reset
Call to
successful
alarm
receiving system
fcdsinar LJK 030102
At customer’s request,
can downgrade some classes
of alarms to lower levels.
alarm receiving
system
No
Acknowledge light
on console flashes
steadily (alarm not
reported)
Summary of Contents for CMC1
Page 1: ...Maintenance Procedures 555 245 103 Issue 1 1 December 2003 ...
Page 14: ...Contents 14 Maintenance Procedures December 2003 ...
Page 416: ...Additional maintenance procedures IP Telephones 416 Maintenance Procedures December 2003 ...
Page 426: ...Index X 426 Maintenance Procedures December 2003 ...