Power-Related Hardware - AT&T MERLIN LEGEND Release 2.0 Equipment And Operations Manual

Hardware Components

Power-Related Hardware

Power-related hardware can be added to the system to provide more power
and added protection from power surges. Other accessories apply to specific
conditions.
NOTE:
In most cases additional power surge protection is not needed.
Power Accessories
In a power failure, battery backup units can keep the system running for several
hours.
When adjuncts and adapters are connected to telephones, the power
requirements of the telephones and the communications system increase.
Adding a power accessory to an individual telephone or to the system
accommodates these additional needs.
Battery Backup Power
Battery backup for power to the system can be provided by an optional 500 VA
uninterruptible power supply (UPS) and reserve UPS units, The basic UPS
provides power for 15 minutes. Reserve UPS units can be added to the basic
UPS. Each reserve unit added extends backup power for an additional hour.
The holdover back-up durations for normal system operation of one full carrier
at a maximum system load are as follows:
15 minutes
1 hour
2 hours
4 hours
Telephone Power Units
Connected between the telephone and the wall jack, the KS22911, L2 and 329A
power units provide additional power to individual telephones that have
adjuncts, adapters, and/or two DSS
control unit. Adding local power to a few telephones can reduce the system
load.
Table 2-9 shows local auxiliary power requirements. The KS22911, L2 power
supply must be connected to an unstitched 117-VAC outlet.
basic 500 VA UPS
one 500 VA reserve cabinet for each UPS
two 500 VA reserve cabinets for each UPS
four 500 VA reserve cabinets for each UPS
S
attached, or to telephones far from the
Power-Related Hardware
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