Toshiba Strata Dk14, Dk40i, Dk424 General Description Manual

Strata DK424
Power Requirements
Strata DK General Description    5/9927
Table 20 DK424 Summary of Electrical/Environmental Characteristics 
DK424 Primary Power 
Input AC
AC amps for seven-cabinet system
AC frequency
Watts per cabinet (continuous)
Watts for six cabinet system (continuous)115VAC 
± 10VAC
20 amp circuit
50/60 Hz
180
845
DK424 Maximum Peak AC Input Current 
1 cabinet – 2.5 amps
2 cabinets –5.0 amps
3 cabinets – 7.5 amps
4 cabinets – 10.0 amps5 cabinets – 11.5 amps
6 cabinets – 15.0 amps 
7...

Strata DK424
Floor Mount Hardware
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Two or four customer-supplied 12-volt reserve batteries can be connected to the system to 
maintain normal operation during a power failure (see Ta b l e  2 1). 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, and when normal AC power is available, 
batteries cannot be connected after/during an...

Strata DK424
Functional Block Diagrams
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Functional Block Diagrams
The Functional Block Diagrams shows the PCBs and interface connectors used for connecting the 
stations and peripherals (see Figures 12~14).
Figure 12 KSU Processor and Optional Interface PCBsRCCB1, 
RCCB2Conduit Connection Box – This box is required for AC and battery power connection to three or 
more floor-mounted cabinets. (Not required for mounting two cabinets on a table or any number of...

Strata DK424
Functional Block Diagrams
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Figure 13 CO Line Side Functional Block Diagram
RDTU2• 2T1 / DS1(24 Channels / Lines)
• Loop Start, Ground Start, Tie, DID
• Digital Voice Lines Channel
Service
Unit (CSU) 25-pair Amphenol
TOSHIBA NDTU Cable
DB15
PLL Synchronization Circuits
2
RCOU4 Loop Start Co Lines (Analog)
RGLU24 Loop or Ground Start CO Lines (Analog)
RCOS (Optional PCB on RCOU Only):4 Loop Start CO Lines (Analog)
RCIU2
RCIS4 Caller ID Circuits
4 Caller...

Strata DK424
Functional Block Diagrams
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Figure 14 Station Side Functional Block Diagram
S4R4
S4
U4
U4
RATU4 Attendant Console Circuits
RBSU3
2B+1D/Circuit
(2-NT Circuits)
RBUU3
2B+1D/Circuit
(2-NT Circuits)
1 1 1 1
1 1 1
1
EOCU(Option PCB
to Receive
Speaker OCA)
RDSU4 Digital Telephone Circuits
2 Standa rd Telephone Circuits
PDKU28 Digital Telephone Circuits
RWIU32 Digital Wireless Telephone Circuits
RSTS(Option PCB)
2 Standard 
Telephone 
CircuitsR48S(Option PCB,...

Strata DK424
System Technology
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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 enables the Strata DK circuit designs to be simple and 
efficient. Gate arrays using very large scale integration...

Strata DK424
Strata AirLink Wireless System
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Strata AirLink Wireless System
The Strata AirLink Wireless Telephone system that is configured to standard ports of the Strata 
DK and many non-Toshiba telephone systems has software that enables a System Administrator or 
technician to quickly diagnose error messages, alarms, and traffic conditions by viewing a PC 
monitor before troubleshooting the hardware.
The Status Window, displayed by the Strata AirLink Manager...

Strata DK424
Strata AirLink Wireless System
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Universal Slot PCBs4
This chapter describes each of the PCBs that install into the universal slots of the Strata DK40i 
Expansion KSU and the DK424 Base/Expansion Cabinets. The following paragraphs categorize 
the cards according to their function.
Descriptions here apply to both DK40i and DK424 unless noted otherwise. The DK14 does not 
support any universal slot PCBs.
Station PCBs
Feature subassemblies, such as the Standard Telephone Interface Subassembly (RSTS),...

Universal Slot PCBs
Station PCBs
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Strata AirLink Wireless Interface Unit (RWIU)
The RWIU interfaces the DK40i and DK424 with the Strata AirLink Telephone wireless system. 
The card functions as a protocol converter between the Base Stations and the PBX. It has four 
digital circuits that connect to four Base Stations using industry standard RJ11 jacks. Roaming and 
handoff functionality are present between all four Base Stations.
CO Line/Digital Telephone Interface...