Instruction manual

HARDWARE DESCRIPTION
Optional Power Equipment
In addition to the power supplies already mentioned, the following equipment can be used
with System 25.
Uninterruptible Power Supply
The AT&T 1KVA Uninterruptible Power Supply (UPS) Model 010U111 PEC 2403-004 is
recommended. At maximum load the UPS will bridge a 5-minute power outage. The UPS
must be connected to the common System 25 power outlet. One UPS will support a 2-
cabinet system.
AC Power Line Surge Suppressor
The TII Model 428 Self-Restoring Power Line Surge Suppressor (PEC 8310-001, Comcode
402988950) protects against electrical surges, spikes, and transients that can cause damage
to the System 25 power supply. A pilot light indicates that full protection is present. The unit
plugs directly into a standard 120-volt 15-amp grounded outlet, providing a dual outlet for
protected equipment.
346 Modular Bulk Power Supply
The 346 Modular Bulk Power Supply (346 MBPS) is a cost effective and flexible alternative to
the KS-22911 power supply. The 346 MBPS can be used where the wall outlet mounted
KS-22911 cannot be used (Canada) or where multiple KS units are required. The 346 MBPS
consists of the 346A Power Unit (346A PU) and the 346A1 Power Panel; that is the sole
method of mounting the power units. Up to three 346A PUs can be mounted per power
panel. Each PU is capable of powering 4 terminals with adjuncts, for a total of 12 terminals
per full MBPS. The 346 MBPS is intended to be installed in a closet and should be near the
terminals (within 260 feet). All connections are modular and are made with cords and
adapters at the 858A Adapter on the SIP. Terminals and Selector Consoles can be powered
by the 346 MBPS.
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