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 cabinets – 17.5 amps
Environmental Specifications
Operating temperature
Operating humidity
Storage temperature32~104° F (0~40° C)
20~80% relative humidity without condensation
-4~158° F (-20~70° C)
Power Supply
DC voltage output specification-24VDC (-26.3~-27.8VDC)
+5VDC (+4.5~+5.5VDC)
-5VDC (-4.5~-5.5VDC) - Expansion Cabinet only
Battery Charger Characteristics
Charger: current limiting
Nominal float voltage: 2.275 volts/cell
Charge current: 0.7 amps maximum
Battery discharge cut-off voltage: 20.5  
±0.5VDC
PESU (Circuits 1 and 2)
Ring voltageSquare wave output with high/low option jumper:
Low position 130 
±20VDC peak-to-peak (no-load)
High position, 190 
±25VDC peak-to-peak (no-load)
Ringing capability 2 ringers maximum per circuit, high or low position
RSTU2 or RDSU 
Ring voltage 80V RMS sine wave
Ringing capability 1.5 REN per circuit, with or without Message Waiting
RSTU2 Message Waiting voltage -90 VDC/one telephone per circuit (max.)
RSTU2 or PESU modem interface data rate 14,400 bps maximum
BTU Rating
PDKU (5)
RCOU/RCOS (1)
RCTUB (1)
DKTs (40)190 BTUs (56 watt hours) per cabinet
Traffic Rating Characteristics
9 CCS per station system-wide
36 CCS per ACD/SMIS station
NoteThere are system limits for the number of simultaneous Agents depending on traffic. See the Strata DK Call Center 
Solutions General Description for details. 
						

							Strata DK424
Floor Mount Hardware
28Strata DK General Description    5/99
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 actual power failure.
Table 21 Typical Reserve Power Duration Estimates (in hours)
Underwriters’ Laboratory (UL) and local electrical codes require certain standards for connecting 
commercial AC and reserve power to the Strata DK424 system.Table 22 describes which 
assemblies may be required to meet UL and local electrical code standards.
Floor Mount Hardware
The lightweight and compact design enables easy wall or floor mounting. The RFIF hardware kit 
is needed for floor mounting (see Ta b l e  2 2). If floor mounting three or more cabinets, AC and 
reserve power must be connected to the RCCB conduit connection box option by a licensed 
electrician. Wall mounting the system does not require special hardware.
Number of Cabinets1234567
2 batteries 16.0 8.0 5.0 3.7 3.09 2.5 2.1
4 batteries 32.0 16.0 10.0 7.5 6.0 5.0 4.2
Discharge Current 3.5A 6.7A 9.9A 13.1A 16.3A 19.5A 22.7A
Table 22 Cabinet Power, Reserve Power, and Floor Mount Hardware Assemblies 
AssemblyFunction
RBTC1A-2MReserve Power Cable – Two cables are required for up to six cabinet systems and three are 
required for seven cabinet reserve power installations (for current carrying capacity) when 
connecting reserve (battery) power to three or more cabinets (wall mount). RBDB2 is also 
required for connecting battery terminals—see “RBDB2” below. A licensed electrician must install 
this item to retain UL listing and/or local electrical code compliance.
PBTC-3MReserve Power Cable – Connects cabinet Power Supply to battery terminals. If reserve power is 
connected to one or two cabinets (wall or table mount), one cable is required for each cabinet. A 
licensed electrician must install this item to retain UL listing and/or local electrical code 
compliance.
RBDB2 Battery Distribution Box – Distributes reserve power when three or more cabinets require 
reserve power (floor or wall mount). Six RBTC2A-1.5M cables are provided with the RBDB2 
distribution box to connect up to six DK424 power supplies to the battery distribution box. An 
RC7C1A-1.7M is also required for a seventh cabinet.
RC7C1A-1.7MCabinet 7 Cable Kit – Provides long data cable to connect the sixth Expansion Cabinet to the 
DK424 Base Cabinet. Provides a long battery cable to connect RBDB2 battery distribution box to 
the sixth Expansion Cabinet power supply. Data and battery cables used for seven cabinet 
installations only. 
RFIFFloor Mount Fixture Kit – Provides two metal stands for mounting three or more cabinets on 
floor; supports up to seven cabinets. Three pairs of wall brackets (RWBF) are supplied with RFIF. 
Wall brackets are needed to secure floor-mounted systems to the wall for safety purposes (not 
required for wall-mounted cabinets). 
						

							Strata DK424
Functional Block Diagrams
Strata DK General Description    5/9929
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 
cabinets on a wall.) A licensed electrician must install this item to retain UL listing and/or local 
electrical code compliance.
RCCB1 supports up to six floor-mounted cabinets. 
RCCB2 supports up to seven floor-mounted cabinets.
RPSB1Three-outlet AC Power Strip – One RPSB1 required when installing three or four cabinets (wall 
or floor mount). Two RPSB1s are required when installing five, six, or seven cabinets (wall or floor 
mount). Two AC cords will exit the cabinets in some configurations.
RPSB2Three-outlet AC Power Strip – Used with a high current carrying capacity cord for application 
where local electric codes (or user) requires only one AC cord to exit four or more cabinets. 
Toshiba highly recommends using the RPSB2 for two-cabinet installations to accommodate 
further growth. Must be ordered for seven cabinet systems.
RWBFWall bracket pair – Required for floor mounted seven cabinet systems. Secures the seventh 
cabinet to the wall for safety (not required for wall-mounted cabinets – see RFIF). Table 22 Cabinet Power, Reserve Power, and Floor Mount Hardware Assemblies 
(continued)
AssemblyFunction
Data and Speech Highway
25-pair
or
Terminal Strip(N/A RSSU)
4248
IMDU
RCTU
Micro-
Processor
(68000 or 68020)
Flash
or
RAMMain Control PCB
(Optional) PCM
Switch
System
Tones
Switch
DTMF
Receiver
(4~24 ckts.)
Conf
Switch
RRCS
Twisted
Pair
Music Source: External Zone Page
Background Music
Door Lock or BGM Mute Control Relay
External Zone Page Relays (4 Zones)
External Page Amplifier (600W Output)
Music Source: Background Music 
and/or Music-on-hold
MOH/BGM
Volume 
Control
Main Distribution
Frame (MDF)MOH/BGM
RCA Jack
Alarm Relay Sensor
Night Bell or MOH (Control Relay)
Battery Charger12V
Battery
12V
BatteryTwisted Pair
1.  Customer-supplied equipment.
RKYS
Option Key
AA/ACD/MIS
(2 or 4 Batteries)
CBRUKABR Tone
Detector
(Standard)
RPSUCabinet 
Power SupplyROM
1200 bps Modem
RSSU/PIOU/PIOUS/PEPUSingle Serial Port (N/A PEPU)
SMDR Port (N/A RSSU/PEPU)
RSIU Serial Interface PCB (1 Port)
RSIS/RMDSSerial/Modem (2400 bps)
Interface  PCBs ( 1~3 Ports)
Programmable Serial Port
Modular Jacks or Remote Modem HMIS
SMDI
Voice Mail DKAdmin PC1
Insight DK, 
Call Center
Viewer &
ACD/MIS
 PC1SMDR
Call Accounting
Device or Printer1
Amplified Page Output (3 Watts)1
1
1
1
1
1
1
1 
						

							Strata DK424
Functional Block Diagrams
30Strata DK General Description    5/99
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 ID Circuits
(Two 4-Wire Modular Jacks)
MDF(Two 4-Wire Modular Jacks)
(Two 4-Wire Modular Jacks)(Two 4-Wire Modular Jacks)
(Two 4-Wire Modular Jacks)
1
RDDU4 DID CO Lines (Analog)
REMU4 E&M Tie Lines (Analog) 
(REMU, Four 8-Wire Modular Jacks)(Two 4-Wire Modular Jacks)
Secondary Protectors2
RPTUISDN PRI (23B+1D channels)
Digital Voice/Data Toshiba RPRI-CBL-KIT
Channel
Service
Unit (CSU)8-wire Modular Jacks
2
ISDN BRI (U)
2 Circuits (NT-1 )
Voice/Data  (2B+D)RBUU
RBUSISDN BRI (U)
2 Circuits (NT-1)
Voice/Data  (2B+D) U
4
U48-wire Modular Jacks
8-wire Modular Jacks
3
3
ISDN BRI (S/T)
2 Circuits (TE)
Voice/Data  (2B+D)RBSUNT1 per circuit2
U4T48-wire Modular Jacks
RMCUTrunk Circuits for E911
RCMS    2 Trunk Circuits
RCMS    2 Trunk CircuitsCAMA Line (2-wire Modular Jacks)
CAMA Line (2-wire Modular Jacks) Network Demarcation Point
4272
Central Office 
Centrex
PBX
Common Carrier
Other Telephone System
E911 Public Safety Answer
Point (PSAP) •
•
•
•
•
•
1.  RCIU2/RCIS tip/ring cross 
connected to RCOU, RCOS, or 
RGLU tip/ring at MDF.
2.  Customer-supplied equipment.
3.  RBUU/RBUS (Release 4.2).
4. U, S, T, R are ISDN reference      
    model termination points.
Data and Speech Highway 
						

							Strata DK424
Functional Block Diagrams
Strata DK General Description    5/9931
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,
RDSU/RSTU2
Only) -48 Volt
Loop Supply
R48S(Option PCB,
RDSU/RSTU2
Only) -48 Volt
Loop Supply
PESU4 Electronic Telephone Circuits
2 Standard Telephone Circuits
EOCU(Option PCB
to Receive
Speaker OCA)
RBSS2B+1D/Circuit
(2-LT Circuits)
RBUS2B+1D/Circuit
(2-LT Circuits)
Data and Speech Highway
Digital Telephone (DKT)
and Add-on Module
Digital Telephone
with RPCI-DI
DDCB Cordless DKT
MDFB
Door Phones and
Lock Controls TAPI PC
Modem
(Pool)DIU-DS
Mainframe Computer
DIU-DS
DIU-DSRS-232 Cables
Printer (Sharing)Digital Telephone
with DSS Console 1 Pair Modular Cord
RS-232 Cable
PC
1-pair Modular Cords
DPFTVoice
Mail
Base Station 1 Strata AirLink Wireless
Base Stations (4)
Handsets Handsets
Base Station 2 ModemRS-232 Cables
HESB
Loud
Ringing Bell Strata AirLink Base Station
Interface Adapter (BSIA)
Electronic 
Telephone (EKT)
Door Phones and
Lock Controls Standard
Telephone
Alternate BGM 
source to stations 
and Page Output
Modular Jacks
Main Distribution Frame (MDF) 25-pair Amphenol Connectors and 
Cables (except RBSU/RBSS)
PC Attendant
ConsoleEKT with HDSS Console
(PEKU Only) Power Failure
Transfer UnitPower Failure
Standard Telephone (8 max.)
Off-premises Station Digital Annuncer
for ACD and Auto Attendant
Secondary
Protector
1.  Customer-Supplied equipment
2.  RSTU2 is required for standard telephone message waiting lamp.
3.  RBUU/RBUS (Release 4.2).
4.  U, S, T, R are ISDN reference model termination points.FAX
HDCB MDFB
4250
2
RSTU2 8 Standard
Telephone Circuits
PEKU 8 Electronic
Telephone Circuits
PC
ISDN
Telephone
(TE-1, S-Type)COM Port
ISDN
Telephone
(TE-1, U-Type)PC with
Video Card
(TE-1, U-Type) Digital Single Line
Telephone (DKT)
TA 
						

							Strata DK424
System Technology
32Strata DK General Description    5/99
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 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. System operating software is 
stored on Read Only Memory (ROM), and individual configuration and custom programming is 
stored on Random Access Memory (RAM) for Strata DK. 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 
DKAdmin PC connected to an optional maintenance port. 
DKAdmin/DKBackup
Toshiba DKAdmin/DKBackup software enables customer data (configuration, station, and system 
options) to be downloaded to a PC and stored on a computer disk. The customer data can be added 
to, or changed, using the PC independent of the DK System.
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 DKBackup software program is also available. The program consists of a small subset of 
DKAdmin/DKBackup functions which can perform backup, restore and upgrade functions, but 
cannot edit customer databases. 
						

							Strata DK424
Strata AirLink Wireless System
Strata DK General Description    5/9933
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 software, is an active window in 
which viewing reports, querying the software, and rebooting the Base Station Interface Adapter 
(BSIA) is possible. Some of the available reports are:
©Base Station channels status
©Line status
©Call status
©Critical alarms
The software also creates log files and sends error messages to the PC monitor to assist the 
technician in making corrections. The log files are easily opened in any text editor for viewing and 
have information about the BSIA boot software, Base Station upgrades, software queries, errors, 
and alarms.
RWIU Wireless System
The Strata AirLink Wireless Telephone system that is configured to Strata DK telephone systems 
using its own proprietary RWIU PCB also has software that enables a System Administrator or 
technician to:
©Set system IDs and enter handset IDs
©Set the time and date, and change passwords
©Enable UTAM
©Change communication ports
©Check the software version of the RWIU and Base Stations
©View log messages
©Reset and upgrade Base Stations and the RWIU
©Change Base Station numbers
LEDs and BER Testing
There are several LEDs on each Base Station, BSIA, and the RWIU that indicate normal, boot up, 
and alarm conditions. Signal fading and attenuation can be checked using the resident Bit Error 
Rate (BER) test in each handset for additional troubleshooting and maintenance routines. 
						

							Strata DK424
Strata AirLink Wireless System
34Strata DK General Description    5/99 
						

							Strata DK General Description    5/9935
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), are listed 
below the associated PCB. For a list of available subassemblies, see Table 23 on Page 40.
Digital Telephone Interface Unit (PDKU2)
The PDKU2 has eight digital telephone circuits that can support digital telephones (cordless as 
well as corded), integrated PC interface data units for data calling and/or TAPI application, off-
hook call announce, DDSS consoles or DADMs for attendant stations that must handle a heavy 
load of calls, and a DDCB for a variety of applications. 
Each of these devices only requires one circuit except for the integrated PC interface unit or 
DADM, which shares a circuit with the telephone to which they are connected.
Digital/Standard Telephone Interface Unit (RDSU)
The RDSU in its basic configuration has two standard telephone circuits and four digital telephone 
circuits (cordless as well as corded). The standard telephone circuits can support the same devices 
that the RSTU2 can, with the exception of standard telephone message waiting lamps. 
The digital circuits can support the same devices as the PDKU, except for the DDSS console. The 
RDSU can be equipped with an RSTS subassembly to provide two more standard telephone 
circuits, and an R48S subassembly to increase the standard telephone maximum loop length.
©DK40i – a K5RCU or K5RCU2 must be installed in the Base KSU to interpret DTMF tones 
transmitted by devices connected to the standard telephone circuits.
©DK424 – an RRCS must be installed on the common control unit to interpret the DTMF 
signals for devices connected to the standard telephone circuits.
Standard Telephone Interface Subassembly (RSTS)
The RSTS attaches to the RDSU and adds two standard telephone circuits to the PCB. With the 
RSTS installed, the RDSU provides four standard telephone circuits and four digital telephone 
circuits. (RSTS does not support standard telephone message waiting.) 
						

							Universal Slot PCBs
Station PCBs
36Strata DK General Description    5/99
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 Unit (KCDU) (DK40i only)
The KCDU provides two analog loop start CO line circuits and four digital telephone circuits. The 
CO line circuits offer all of the features that the Base TCOU and the RCOU line circuits provide. 
The digital telephone circuits can support every peripheral (except for the DDSS console) that the 
PDKU2 and a Base KSU digital circuit can support. Up to four KDCU PCBs can be installed in 
the DK40i Expansion Unit.
NoteThe RCIU2 Caller ID Interface Unit is required to add Caller ID with the KCDU PCB.
Electronic Telephone Interface Unit (PEKU)
The PEKU provides eight electronic telephone circuits that can interface with electronic 
telephones, an alternate BGM source, a Direct Station Selection Console (HDSS), an external 
amplifier for DISA or two-CO line Conferencing. 
Standard/Electronic Telephone Interface Unit (PESU)
The PESU offers two standard and four electronic telephone circuits. Its standard circuits support 
the same devices as the KSTU2. Its electronic circuits interface with the same peripherals as the 
PEKU, except for the HDSS console. 
©DK40i
 – a K5RCU or K5RCU2 must be installed in the Base KSU to interpret DTMF tones 
transmitted by devices connected to the standard telephone circuits.
©DK424
 – an RRCS must be installed on the common control unit to interpret the DTMF 
signals for devices connected to the standard telephone circuits.
Off-hook Call Announce Upgrade Unit (EOCU)
Electronic telephones connected to PEKU and PESU PCBs can receive speaker Off-hook Call 
Announce (OCA)—internal [DN] calls over their speaker while they are on another call—if the 
PCBs are equipped with an EOCU. Digital telephones also support this function, but do not require 
an EOCU in the KSU. Unlike digital telephones, electronic telephones cannot receive handset 
OCA.
Standard Telephone Interface Unit (RSTU2)
The RSTU2 has eight circuits that can support single-line devices (one device per RSTU2 port). 
Besides rotary and DTMF standard telephones, the RSTU2 can support the Strata AirLink 
Wireless analog system, fax machines, dictation equipment, modems, a separate BGM source, off-
premises stations, Toshiba Stratagy and VP voice mail systems, and digital announcement devices 
for optional built-in AA or ACD.
This PCB also supports the Message Waiting feature on standard telephones that are equipped with 
a 90VDC neon message waiting lamp.
The RSTU2 also provides an 80V RMS sine wave ring generator and has interface connectors for 
an optional R48S subassembly that increases the maximum possible station loop length from 600 
to 1200 ohms.