Instruction manual

Strata DK40i
Network Requirements
18 Strata DK General Description 6/00
Network Requirements
See Table 43 on Page 122 for network requirements of station and line PCBs and interface cards.
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 enables the Strata DK40i circuit designs to be 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 minimize system power requirements.
Stored Program Control
The system uses a 16-bit microprocessor for stored program control. Strata DK40i 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.
Maintenance and Programming
Hardware maintenance and repair procedures describe how to quickly locate, remove, and replace
defective parts and PCBs. System programming can be performed without taking the system out-
of-service.
On-site programming can be executed with any 20-button proprietary LCD telephone or with a
DKi Admin PC connected to an optional maintenance port. Off-site programming with
DKi Admin is available through a customer-provided modem connected to the maintenance port.
DKi Admin/DKi Backup
Toshiba DKi Admin software Release 4.3.1 and higher, enables customer data (configuration,
station, and system options) to be downloaded to a PC and stored on a computer disk. The new
customer data can then be uploaded to the DK System from the PC, changing customer program
options on-site or remotely over telephone lines and/or modems.
The DKi Backup software is also available. DKi Backup consists of a subset of DKi Admin
functions such as backup, restore and upgrade functions, but it cannot edit customer databases.
StrataControl
StrataControl™ is a Windows-based PC application enabling limited access to Strata DK40i and
DK424i system programming functions. See “StrataControl” on Page 89 for more information.