Toshiba Strata Dk14, Dk40i, Dk424i General Description Manual

Strata DK424i
Functional Block Diagrams
Strata DK General Description    6/0035
Functional Block Diagrams
The Functional Block Diagrams show the PCBs and interface connectors used for connecting the 
stations and peripherals (see Figures 12~14).
Figure 12 KSU Processor and Optional Interface PCBs
Data and Speech Highway
25-pair
or
Terminal Strip(N/A RSSU)
5210
IMDU
B_C_U
Micro-
Processor
(68000 or 68020)
Flash
or
RAMProcessor PCB
(Optional)
PCM
Switch
System
Tones
Switch
DTMF
Receiver
(4~24 ckts.)
Conf...

Strata DK424i
Functional Block Diagrams
36Strata DK General Description    6/00
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...

Strata DK424i
Functional Block Diagrams
Strata DK General Description    6/0037
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-LT 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 DK424i
Maintenance and Programming
38Strata DK General Description    6/00
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...

Strata DK General Description    6/0039
Universal Slot PCBs4
This chapter describes each of the PCBs that install into the universal slots of the Strata DK40i 
Expansion KSU, the DK424i Base/Expansion Cabinets. The following paragraphs categorize the 
cards according to their function.
Descriptions here apply to both DK40i, DK424i unless noted otherwise. The DK14 does not 
support any universal slot PCBs. 
Feature subassemblies that plug onto a universal slot PCB, such as the Standard Telephone...

Universal Slot PCBs
Station PCBs
40Strata DK General Description    6/00
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.)
Strata AirLink Wireless Interface Unit (RWIU)
The RWIU interfaces the DK40i, DK424i with the Strata AirLink Telephone wireless...

Universal Slot PCBs
Console PCBs
Strata DK General Description    6/0041
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.

DK40i – a K5RCU or K5RCU2 must be installed in the Base KSU to interpret DTMF tones 
transmitted by...

Universal Slot PCBs
CO Line PCBs
42Strata DK General Description    6/00
RCIS can provide a maximum of eight Caller ID circuits per cabinet slot. Built-in gas tubes help 
protect each RCIU2/RCIS circuit from lightning surges. 
Loop Start CO Line Interface Unit (RCOU)
The RCOU in its basic configuration has four analog loop start CO line circuits, connecting to the 
public telephone network. 
Each RCOU line can be programmed for DTMF or Dial Pulse signaling and has a switch to control 
potential excess...

Universal Slot PCBs
CO Line PCBs
Strata DK General Description    6/0043
Voice Over IP Gateway (BVPU)
The BVPU combines the functions of a four-circuit REMU E&M Tie line card and a Voice Over 
Internet Protocol (IP) gateway on a single PCB. The BVPU is an H.323 Version 2 compliant 
gateway and can interoperate with other H.323 devices as well as other BVPUs. The BVPU allows 
multiple Strata DKs to establish virtual Tie line connections across an IP network. The BVPU 
connects to the LAN through an RJ45,...

Universal Slot PCBs
CO Line PCBs
44Strata DK General Description    6/00
A maximum of two simultaneous voice and/or data calls are allowed between all devices 
connected to the same BRI circuit. The contention rule for the two BRI B channels is first come, 
first serve. Network connections using BRI S/T type interface also require a dealer-supplied, 
UL-listed, external Network Terminal (NT-1) device. In Canada, the NT-1 must be CSA certified.
Basic Rate Interface Subassembly (RBSS)
The RBSS attaches to...