Base Ksu Architecture; Digital Telephone Circuits; Central Office (Co) Line Circuits (Tcou/Tddu/Tbsu) - Toshiba Strata DK14 General Description Manual

Base KSU Architecture

The Strata DK40i Base KSU contains the main processor, operating software, circuitry and the
following components (see
-24 Volt Circuit
Breakers
Connect Expansion
Unit TB1 TO FG2
Important Notice
Expansion KSU
Cable Receptacle
Battery Jumper
Figure 6 Base KSU Interior

Digital Telephone Circuits

The main circuit board (TMAU2) in the Strata DK40i Base KSU has eight integrated circuits that
can connect to Toshiba-proprietary digital telephones (including the cordless telephone), Stand-
alone Data Interface Units (PDIU-DSs), Digital Door Phone/Lock Control Units (DDCB), and
Digital Direct Station Selection Consoles (DDSS).
Furthermore, each of the digital telephones can support a PC Data Interface Unit (RPCI-DI) or up
to two Add-on Modules (DADMs).

Central Office (CO) Line Circuits (TCOU/TDDU/TBSU)

A TCOU PCB can be installed in the Base KSU to provide four circuits for loop start CO lines. Or,
a TDDU PCB can be installed to provide four circuits for Direct Inward Dialing (DID) lines. Or,
the TBSU can be installed to provide two circuits for BRI lines or stations (see TBSU below).
The CO line interface and DID interface unit can be programmed for DTMF or dial pulse signaling
and each line has a switch to control potential excess volume that could be created by a nearby
PBX or CO. Built-in gas tubes help protect each TDDU and TCOU line from lightning. An
optional RDDU (for DID lines) installed in the Expansion Unit requires an external secondary
protector. DID lines require the optional K5RCU2 tone receiver.
Strata DK General Description
Figure 6).
FG2
OFF
ON
4238
Music-on-Hold
Sensitivity Adjustment
5/99
POWER SUPPLY ASSEMBLY
TPSU16A
MODEL
INPUT: AC127V 2.2A 60 HZ
OUTPUT: -27.3V 2.8A. -27.3V 0.2A AC DC
V. 1A 1996-05 00001
TOSHIBA CORPORATION
DC POWER
MADE IN
WARNING
Hazardous voltage inside!
If servicing required
remove A. C. plug.
TMAU2A
Strata DK40i
Base KSU Architecture
Reserve Power
Battery Jack
Base Telephone
Tip/Ring and
Relay Contact
Music-on-Hold
Input
11