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Features of CTX 670
• Strict design standards are used by Toshiba engineers. Components are selected only
after they are thoroughly evaluated for performance in high temperatures and other severe
conditions affecting reliability. Before manufacturing, all equipment undergoes a series
of proprietary tests that analyze environmental, EMI, electrostatic, and stress factors.
• Built-in power surge protection is provided by the Strata CTX670’s
switching-type regulated power supply that provides line filtering and is protected by
circuit breakers that can be reset. This design assures that the Strata CTX670 has one of
the most reliable power supplies available. As a precaution, Toshiba also recommends the
use of external primary power surge protectors, especially in areas where lightning often
occurs.
• Built-in gas tubes on ground and loop start CO line cards help provide secondary
protection of each circuit from lightning and other power surges.
• Stored program control keeps all programming, option settings, and customer
database information in Random Access Memory (RAM). A lithium battery in the CPU, with a
life span of at least six years, preserves RAM when AC power is unavailable. There is no
volatile memory loss and no need for external memory storage components.
• Since there are no moving parts, stored program control data is much safer and the
Strata CTX670 system is much more reliable than systems using disk drives to store data.
The absence of moving parts also reduces heat generation, resulting in longer life and
greater reliability.
Keep Your System Operating
Even During A Power Outage
• Battery Backup enables two or four 12-volt gel-cell, maintenance-free batteries to
be connected to system power supplies. If AC power fails, the Strata system automatically
switches to battery power without any interruption in operation. Calls in progress are not
interrupted. The Strata CTX670 system power supply is standard-equipped with a battery
charger and the batteries continuously trickle charge to capacity while electrical power
is present. Battery operation duration depends on the condition and ampere hour rating of
the batteries, system load, and the number of batteries connected. However, the minimum
battery operation time would be several hours, providing plenty of time to restore
commercial power.
• Power Failure Transfer enables the Strata CTX670 to immediately switch CO lines
directly to dedicated standard telephones for incoming and outgoing calls if a system
power failure occurs. The transfer is automatic, with no manual transfer procedure
required. During normal operation with AC power, the Power Failure-designated telephones
function with all the same Strata CTX670 features available to standard telephones.
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