Toshiba Strata Dk14, Dk40i, Dk424 General Description Manual

							Strata DK40i
System Technology
Strata DK General Description     5/9917
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 Liquid Crystal Display 
(LCD) telephone or with a DKAdmin PC connected to an optional maintenance port. 
Off-site programming with DKAdmin, which can help cut costs and save time, is available 
through a customer-provided modem connected to the maintenance port. DK40i (only) provides 
an optional built-in modem for remote administration and maintenance.
DKAdmin/DKBackup
Toshiba DKAdmin software Release 4.0 enables DK40i 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 functions which can perform backup, restore and upgrade functions, but cannot edit 
customer databases. 
						

							Strata DK40i
Strata AirLink Wireless System
18Strata DK General Description     5/99
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 DK General Description    5/9919
Strata DK4243
This chapter presents the Strata DK424, a private 
telephone system tailor-made for small- to 
medium-sized business applications. It employs 
state-of-the-art technology to provide users with 
an efficient, easy-to-use, feature-rich telephone 
system.
A modular design and a choice of four common 
control units enables the system to fit a variety of 
customer needs and capacities. 
The system line and station capacity can be 
increased by adding additional cabinets (see 
Figure 9 and Ta b l e  9) which have universal slots 
capable of interfacing with almost any of the line, 
station, and option interface PCBs available with 
the system.
Strata DK424 easily connects to outside public 
telephone lines (CO lines). All of the telephones 
(stations) tied to the system can have direct access 
to each other as well as to the public network.
Architecture
Base and Expansion Cabinets
The Base Cabinet and optional Expansion 
Cabinets are the building blocks of the system. 
Each system has a Base Cabinet, and can have from one to six Expansion Cabinets. All lines, 
stations, and options are tied together through the cabinets.
Table 9 Cabinet Specifications
CabinetWeightHeightWidthDepth
Base Cabinet (DKSUB424) 30.0 pounds
(13.6 kg)11 . 8  i n c h e s
(300 mm)23.6 inches
(600 mm)9.8 inches
(249 mm)
Expansion Cabinet 
(DKSUE424)28.4 pounds 
(12.9 kg)10.0 inches
(254 mm)23.6 inches 
(600 mm)9.8 inches
(249 mm)
1952
Figure 9 Base/Expansion Cabinets 
						

							Strata DK424
Architecture
20Strata DK General Description    5/99
Expansion and Configuration
System station and CO line capacity is increased with the addition of cabinets and CO line and/or 
station PCBs. Ta b l e s  11~15 show the number of stations and lines allowed when additional 
cabinets and PCBs are used.
Base Cabinet
The Base Cabinet reserves two slots specifically for the system common control unit, labeled 
“R11” and “RCTU.” The Base Cabinet also has six universal slots, labeled “S11 ~ S16,” which can 
accommodate any station, line or option PCB (see Figure 10).
Figure 10 Base Cabinet Interior
Common Control Units
The system operates with one of four common control units (RCTUA, RCTUBA/BB, RCTUC/D, 
or RCTUE/F). These common control units (sometimes called the “RCTU processors”) can only 
be installed in the Base Cabinet.
©The RCTUA unit consists of a single PCB.
©The RCTUBA/BB, RCTUC/D and RCTUE/F common control units consist of two PCBs.
The RCTI also has a MOH/BGM source interface, and connectors to mount optional DTMF 
receiver PCBs needed for DISA, Tie/DID/Dialed Number Identification Service (DNIS)/
Automatic Number Identification (ANI) lines, voice mail, AA announcement devices, DTMF 
standard telephones, and other peripherals. The RCTU provides an interface for connecting an 
optional feature key (RKYS).
The common control unit contains the systems main 16 or 32-bit, 68000-type microprocessor and 
microprocessor bus, battery-protected memory circuits, time switch logic, ABR tone detectors, 
and system tones. (See Figure 12 on Page 29 for more information.)
Expansion Cabinets
The Expansion Cabinets have eight universal slots, “S_1” ~ “S_8.” Each of the universal slots can 
interface with station, line, or option PCBs. Slots “S_1” ~ “S_6” are available with the RCTUA, 
RCTUBA/BB, or RCTUC/D. Slots “S_7” and “S_8” are only available with the RCTUE/F 
processor. See Figure 11 for slot numbers. The number of expansion cabinets varies according to 
processor capacity (see Tables 16~19.
R11 PCTU S11 S12
S13 S14 S15 S16
R11 S11RCTU S12 S13 S14 S15 S161
2
3-24VPOWER
+5V
-5V
AC INFGDC OUT
+
BATT-
ON
OFF
DKSUEDKSUB
2520 
						

							Strata DK424
Architecture
Strata DK General Description    5/9921
Figure 11 Expansion Cabinet Interior
Cabinet PCB Subassemblies
Subassemblies can be added within the Strata DK cabinets to provide additional features or to 
increase line capacity. Also see “Summary of PCBs and Subassemblies” on Page 40.
DTMF Receiver Subassembly (RRCS)
The RRCS translates DTMF tones from DID/Tie/ANI/DNIS/DISA lines, built-in AA, DTMF 
standard telephones, and other peripheral devices to data signals for the system. 
The RRCS can be attached to the common control unit and is available with either 4, 8, or 12 
(RRCS-4, -8 or -12) shared receiver circuits. See Table 32 on Page 88 for more information.
RKYS Feature Key Upgrades
The system can be upgraded for built-in AA, Automatic Call Distribution (ACD), Software 
Management Information System (SMIS) for ACD, and for Insight DK with the following feature 
keys that attach to the common control unit. See Table 10 for a list of features provided by RKYS 
feature keys.
Table 10 RKYS Features
Printed Circuit Boards (PCBs)
PCBs are installed in the cabinets to provide interface for stations, lines, and peripherals. Each 
PCB measures 7.5 x 5.5 inches (190 x 140 mm) and mounts in the slot with a 44-pin backplane 
connector. PCB external connections to station equipment are made to the Main Distribution 
Frame (MDF) using industry-standard connectors. For more details, see Chapter 5 – Stations and 
Peripherals.
Feature(s) Provided RKYS1RKYS2RKYS3Common Control Unit
Built-in Auto Attendant X X X Applies to all RCTUs
ACD X X RCTUBA/BB, RCTUC/D or RCTUE/F
ACD with MIS data information X RCTUBA/BB, RCTUC/D or RCTUE/F 
S_3 S_6 S_7 S_8 S_1 S_2 S_4 S_5
1
2
3-24VPOWER
+5V
-5V
AC INFGDC OUT
+
BATT-
ON
OFF
CABINET NO.23 45 6S_
1S_
2S_
3S_
4
S_
5S_
6S_
7S_
8
DKSUEDKSUB
2521
S_
1S_
2S_
3S_
47 
						

							Strata DK424
Maximum Line/Station Capacities
22Strata DK General Description    5/99
Maximum Line/Station Capacities
A summary of the maximum number of lines and stations by processor is shown in Ta b l e s  11~19. 
Attaining maximum system capacities depends on power consumption of a particular 
configuration. Power factor calculations in accordance with the Strata DK I&M Manual will 
determine if the maximum capacities in these tables can be reached.
Configurations for a fully expanded system can range from 84 lines/336 stations to a squared 
system of 200 outside lines/224 stations. 
See Ta b l e  11 for the station and line capacities for eight-port RCOU/RCOS CO line PCBs, with 
one slot reserved for an optional interface PCB. There is a trade-off between stations and lines. 
Every group of eight stations installed decreases the CO line capacity of the system by eight, and 
vice versa. 
The following table assumes one cabinet slot is used for an Optional Interface PCB.
Table 11 Configuration for Eight-Circuit CO Line PCBs (RCOU/RCOS) Without Caller ID 
1 Cabinet 
RCTUA2 Cabinets 
RCTUB or 
RCTUBA/BB3 Cabinets 
RCTUC/D4 Cabinets 
RCTUC/D5 Cabinets 
RCTUC/D6 Cabinets 
RCTUC/D7 Cabinets 
RCTUE/F
CO 
LinesStationsCO 
LinesStationsCO 
LinesStationsCO 
LinesStationsCO 
LinesStationsCO 
LinesStationsCO 
LinesStations
16 24 48 40 72 64 96 88 120 112 144 136 200 224
44 40 68 64 92 88 116 112 140 136 196 224
40 48 64 72 88 96 112 120 136 144 192 232
36 48 60 72 84 96 108 120 132 144 188 232
32 56 56 80 80 104 104 128 128 152 184 240
28 56 52 80 76 104 100 128 124 152 180 240
24 64 48 88 72 112 96 136 120 160 176 248
20 64 44 88 68 112 92 136 116 160 172 248
16 72 40 96 64 120 88 144 112 168 168 256
12 72 36 96 60 120 84 144 108 168 164 256
8 80 32 104 56 128 80 152 104 176 160 264
28 104 52 128 76 152 100 176 156 264
24 112 48 136 72 160 96 184 152 272
20 112 44 136 68 160 92 184 148 272
40 144 64 168 88 192 144 280
36 144 60 168 84 192 140 280
32 152 56 176 80 200 136 288
28 152 52 176 76 200 132 288
24 160 48 184 72 208 128 296
44 184 68 208 124 296
40 192 64 216 120 304
36 192 60 216 116 304
32 200 56 224 112 312
52 224 108 312
48 232 104 320
44 232 100 320
40 240 96 328
92 328
88 336
84 336 
						

							Strata DK424
Maximum Line/Station Capacities
Strata DK General Description    5/9923
Tables 12~15 assume one cabinet slot is used for an Optional Interface PCB.
Table 13 Eight Circuit (RCOU/RCOS) CO Loop Start Analog Lines with Caller ID Maximum Capacities Table 12 Configuration for Four Circuit DID or Tie Line PCBs
1 Cabinet 
RCTUA2 Cabinets 
RCTUB or 
RCTUBA/BB3 Cabinets 
RCTUC/D4 Cabinets 
RCTUC/D5 Cabinets 
RCTUC/D6 Cabinets 
RCTUC/D7 Cabinets 
RCTUE/F
CO 
LinesStationsCO 
LinesStationsCO 
LinesStationsCO 
LinesStationsCO 
LinesStationsCO 
LinesStationsCO 
LinesStations
8 24 24 40 36 64 48 88 60 112 72 136 100 224
4 32204832724496561206814496232
16 56 28 80 40 104 52 128 64 152 92 240
12 65 24 88 36 112 48 136 60 160 88 248
8 72 20 96 30 120 44 144 56 168 84 256
4 80 16 104 28 128 40 152 52 176 80 264
12 112 24 136 36 160 48 184 76 272
10 120 20 144 32 168 44 192 72 280
16 152 28 176 48 200 68 288
12 160 24 184 36 208 64 296
20 192 32 216 60 304
16 200 28 224 56 312
24 232 52 320
20 240 48 328
44 336
1 Cabinet 
RCTUA2 Cabinets 
RCTUBA/BB3 Cabinets 
RCTUC/D4 Cabinets 
RCTUC/D5 Cabinets 
RCTUC/D6 Cabinets 
RCTUC/D7 Cabinets 
RCTUE/F
Lines Stations Lines Stations Lines Stations Lines Stations Lines Stations Lines Stations Lines Stations
8 24244040565672728888104136152
16 56 32 72 48 88 64 104 80 120 128 168
8 72 24 88 40 104 56 120 72 136 120 184
16 104 32 120 48 136 64 152 112 200
24 136 40 152 56 168 104 216
32 168 48 184 96 232
40 200 88 248
80 264 
						

							Strata DK424
Maximum Line/Station Capacities
24Strata DK General Description    5/99
Table 15 Digital, Tie, DID, Ground/Loop Start Digital T1 and ISDN PRI Lines Maximum Combined Capacities Table 14 Four Circuit (RGLU) CO Ground Start Analog Lines with Caller ID Maximum Combined Capacities
1 Cabinet 
RCTUA2 Cabinets 
RCTUBA/BB3 Cabinets 
RCTUC/D4 Cabinets 
RCTUC/D5 Cabinets 
RCTUC/D6 Cabinets 
RCTUC/D7 Cabinets 
RCTUE/F
Lines Stations Lines Stations Lines Stations Lines Stations Lines Stations Lines Stations Lines Stations
8 1620243240444856646872104112
16 40 28 48 40 64 52 72 64 88 100 120
8 64246436724888609696136
16 88 32 88 44 96 56 112 92 144
12 96 28 96 40 112 52 120 88 160
24 112 36 120 48 136 84 168
20 120 32 136 44 144 80 184
16 136 28 144 40 160 76 192
24 160 36 168 72 208
32 184 68 216
28 192 64 232
60 240
56 256
2 Cabinets 
RCTUBA/BB3 Cabinets 
RCTUC/D4 Cabinets 
RCTUC/D5 Cabinets 
RCTUC/D6 Cabinets 
RCTUC/D7 Cabinets 
RCTUE/F
Lines Stations Lines Stations Lines Stations Lines Stations Lines Stations Lines Stations
48 56 72 88 112 112 120 152 144 144 1921
1. The maximum number of PRI lines for 2 cabinets is 47, 3~6 cabinets is 141 and 7 cabinets is 188.240
40 64 64 96 96 120 112 160 120 168 184 248
24 72 48 104 88 128 96 168 112 176 168 264
16 80 40 112 72 136 88 176 96 192 160 272
24 120 64 144 72 184 88 200 144 288
16 128 48 152 64 192 72 216 136 296
40 160 48 200 64 224 120 312
24 168 40 208 48 240 112 320
16 176 24 216——96336
Notes
lT1 lines can be in increments of 8, 16 and/or 24.
lPRI channels can be in increments of 23B+1D or 47B + 1D. Each B channel represents a PRI CO line 
						

							Strata DK424
Maximum Line/Station Capacities
Strata DK General Description    5/9925
Tables 16~19 show system maximum capacity examples with ISDN BRI (S/T and/or U) circuits.
Table 16 RCTUA Maximum Capacity Examples with ISDN BRI (S/T and/or U-type) Circuits
Table 17 RCTUBA/BB Maximum Capacity Examples with ISDN BRI (S/T and/or U-type) Circuits
BRI Station 
Circuits1BRI Station 
B channels1Other Station 
Circuits3BRI Line 
Circuits4BRI Line
B channels4Other Line 
Circuits5
82 16216 0 0 0
612 1624 0
510 1636 0
4 8 164
2820
4 8 1624 4
3 6 1612 8
2 4 2424 8
1 2 2812 12
BRI Station 
Circuits1BRI Station 
B channels1
Other 
Station 
Circuits
3
BRI Line 
Circuits4BRI Line
B channels4Other Line 
Circuits5
16232232 821620
12 24 40 8 16 8
10 20 40 8 16 12
 816488 1616
 816486 1220
 816564 824
 816562 428
 612566 1224
 612564 828
 612642 432
 4 8 64 4 8 32
 4 8 64 2 4 32
24722440
1. Each BRI circuit (S/T and/or U-type) provides two B channels plus one D channel and reduces the 
system capacity by two station ports and two CO lines. Each (S/T) BRI station circuit allows up to two 
TE-1 and TA devices to share the BRI B channels (two simultaneous calls maximum per BRI circuit.). 
Each BRI-U circuit supports one TE-1 or TA device.
2. Maximum BRI capacity.
3. Other stations include Toshiba digital and electronic telephones, or attendant consoles, standard 
telephones and devices.
4. BRI S/T circuits are available with RBSU/RBSS PCBs and BRI-U circuits are available with RBUU/
RBUS PCBs. ISDN BRI PCBs will be available with a future release of DK424 software. Each BRI 
line circuit (S/T or U) provides two BRI CO lines (B channels) for incoming/outgoing calls.
5. Other lines include analog and digital (T1 or PRI) loop start, ground start, DID, and Tie lines. 
						

							Strata DK424
Power Requirements
26Strata DK General Description    5/99
Table 18 RCTUC/D Maximum Capacity Examples with ISDN BRI (S/T and/or U-type) Circuits
Table 19 RCTUE/F Maximum Capacity Examples with ISDN BRI (S/T and/or U-type) Circuits
Power Requirements
Each Base and Expansion Cabinet houses a power supply that generates ±5VDC and -24VDC 
which furnishes power to all of the stations and some of the peripherals that interface with the 
cabinet. A fully loaded Strata DK424 requires an input power source of 115VAC ± 10VAC 
(105VAC ~ 125VAC), 17.5 amps., 50/60 Hz. (see Table 20).
BRI Station 
Circuits1BRI Station 
B channels1Other Station 
Circuits3BRI Line 
Circuits4BRI Line
B channels4Other
Line Circuits5
402802144 8216248
30 60 164 8 16 68
20 40 184 8 16 88
16 32 192 8 16 96
12 24 200 8 16 104
816 208 816 112
8 16 216 4 8 120
8 16 216 2 4 124
4 8 228 2 4 132
BRI Station 
Circuits1BRI Station 
B channels1Other Station 
Circuits3BRI Line 
Circuits4BRI Line
B channels4Other Line 
Circuits5
6421282192 8216256
50 100 216 8 16 84
40 80 240 8 16 104
30 60 256 8 16 124
20 40 280 8 16 144
16 32 288 8 16 152
816 304 816 168
8 16 312 4 8 176
8 16 312 2 4 180
4 8 320 4 8 184
4 8 320 2 4 188
2 4 328 2 4 192
1. Each BRI circuit (S/T and/or U-type) provides two B channels plus one D channel and reduces the system 
capacity by two station ports and two CO lines. Each (S/T) BRI station circuit allows up to two TE-1 and TA 
devices to share the BRI B channels (two simultaneous calls maximum per BRI circuit.). Each BRI-U circuit 
supports one TE-1 or TA device.
2. Maximum BRI capacity
3. Conventional stations include Toshiba digital and electronic telephones, or attendant consoles, standard 
telephones and devices.
4. BRI S/T circuits are available with RBSU/RBSS PCBs and BRI-U circuits are available with RBUU/RBUS 
PCBs. ISDN BRI PCBs will be available with a future release of DK424 software. Each BRI line circuit (S/T 
or U) provides two BRI CO lines (channels) for incoming/outgoing calls
5. Conventional lines include analog and digital (T1 or PRI) loop start, ground start, DID, and Tie lines.