Toshiba CTX28 Telephone User Manual


 
Rack Mount Cabinets
Power Considerations
Strata CTX I&M 06/04 5-3
Rack Mount Cabinets
Input Power
The Rack Mount Cabinets require an input power source of 115±10VAC or 208±20VAC or
240±20VAC, 50/60 Hz, single phase, for up to five cabinets; 208VAC or 240VAC is required for
six or seven cabinets. The system requires one or two AC outlets that must be dedicated to system
use, fused, and grounded.
CAUTION! To avoid accidental power turn-off, do not use an On/Off wall switch for AC
circuits dedicated for the use of the Rack Mount Cabinets.
A reserve power source (two or four customer-supplied 12VDC batteries) can be connected to
serve as a backup in case of power failure.
Environmental Conditions
CAUTION! Equipment is for use in a Restricted Access Location.
Operating Temperature: 0~104 degree Fahrenheit (0~40 degree Centigrade)
Operating Humidity: 20~80% relative humidity without condensation
Location
When selecting a location for the cabinets, the location must be:
Dry and clean
Well-ventilated
Well-illuminated
Easily accessible
The location must not be:
Subject to extreme heat or cold
Subject to corrosive fumes, dust, or other airborne contaminants
Subject to excessive vibration
Next to television, radio, office automation, or high frequency equipment
Power Considerations
Each Rack Mount Base and Expansion Cabinet houses a power supply that furnishes power to all
of the stations and some of the peripherals that interface with the cabinet (see Table 2-60, “Strata
CTX670 Electrical Characteristics” on page 2-47).
Reserve Power
Two or four customer-supplied 12VDC reserve batteries can be connected to the system to
maintain normal operation during a power failure (see Table 2-63 on page 2-49 and Table 2-60 on
page 2-47). The batteries are kept in a highly-charged state by the standard power supply and must
be connected when the system is operating normally. Fully charged batteries must be connected
when normal AC power is available, batteries cannot be connected after/during an actual power
failure.
Underwriters’ Laboratory (UL) and local electrical codes require certain standards for connecting
commercial AC and reserve power to the rack mount system. Table 5-3 describes which
assemblies may be required to meet UL and local electrical code standards. See “(Optional) Install
Reserve Power” on page 5-14 for instructions on installing reserve power.