Instruction manual

Strata DK14
KSU Architecture
2 Strata DK General Description 6/00
KSU Architecture
The Strata DK14 KSU contains the main processor, operating software, circuitry and the following
components (see Figure 2).
Figure 2 KSU Interior
Digital Telephone/Central Office (CO) Line Circuits
The main PCB (WMAU) has four integrated circuits that can connect to digital corded and/or
cordless telephones, stand-alone data interface units (PDIU-DSs), and digital door phone/lock
control units (DDCB). Each of the digital telephones can support a PC Data Interface Unit (RPCI-
DI) or up to two Add-on Modules (DADMs). It does not support a DDSS console.
Two circuits for loop start CO lines are built into the main PCB. Each line can be programmed for
Dual-tone Multi-frequency (DTMF) or dial pulse signaling. It includes a switch to control
potential excess volume from a nearby private branch exchange (PBX) or CO. Built-in gas tubes
help protect each circuit from lightning. Each line supports Caller ID when optional equipment is
added.
J15
QSTS1A
J1
J11
J4
J14
J6 J8
J1
F.G.
STU STU
J7 J5
WARNING
Hazardous voltage inside ! If servicing required, remove A.C. cord.
HPFB6
QCDU2A
QKYS
J2
J10
J20
J3
J21
J4
J1
SW101
CO4
SIO 1
SIO 2
DC
BATT
QRCU3A
Component Side
CO2
J6-25 Pair
Amphenol Jack
(female) for
Telephone
Tip/Ring and
Relay Contact
CO3
CO1
PFT, RJ11
Modular
Jack
6-wire RJ11
Modular Jacks
6-wire RJ11
Modular Jack
1 or 2
HPFB reserve
power units
System
Frame
Ground
Bar
AC
DC
QCDU2A
MOH
Jack
MOH
Volume
Control
600
ohm
Page
Not
Used
F.G.
J9 J1
0 PAD 3
SW101
SW1
190 130
J2
STU
J12
J3
STU
J13
QSTU2A
QSTS2A
VR701
J22
2364
WSIU1A
0 PAD 3