System Technology; Pulse Code Modulation; Custom Electronic Circuitry; Stored Program Control - Toshiba Strata DK14 General Description Manual
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Also See for Strata DK14:
- Installation and maintenance manual (724 pages) ,
- Programming manual (424 pages) ,
- System administrator manual (56 pages)
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System Technology
Pulse Code Modulation
Digital switching talkpaths enable all CO and intercom lines to be accessed simultaneously.
Analog-to-digital and digital-to-analog conversion is done by CODECs (coder plus decoder) on
station and CO line PCBs.
Custom Electronic Circuitry
Large Scale Integration (LSI) technology makes the Strata DK14 circuit designs simple and
efficient. Gate arrays using very large scale integration save vast amounts of space by using the
latest technology. More circuitry fits onto smaller PCBs for a more compact system. Widespread
use of CMOS circuits minimizes system power requirements.
Stored Program Control
The system uses a 16-bit microprocessor for stored program control. The Strata DK14 System
operating software is stored on Read Only Memory (ROM), and individual configuration and
custom programming is stored on Random Access Memory (RAM). A lithium battery with a life
span of at least six years preserves RAM in the case of a power failure.
Microprocessors
The system's main microprocessor is a 16-bit 68000-type that operates at a clock speed of
8 MHz. In addition, some PCBs use 8-bit, TMP90C840-type local microprocessors that run at 10
MHz. This distributed microprocessing architecture is used system wide.
Strata DK General Description
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Strata DK14
System Technology
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