Table of Contents
Advertisement
PERCEPTION,~,,
Tl/OS-1
SEPTEMBER 1991
PERCEPTION,,,,
ANALOG
PBX
MAXIMUM
-
30FT
NDTU
csu
E&M
(TYPE I
OR II)
I
IF OVER 655 FT
FIGURE 3-DS-1 CONNECTION VIA CSU AND CHANNEL BANK
the PERCEPTIONehex
system and the PBX
exceeds
655 feet (see Figure 3).
NOTE:
CSUs are required
if the distance
between
PBXs is greater
than 655 feet.
2 NDTU CONFIGURATION
2.00 The NDTU interface
has the following
con-
figuration:
1) Printed
Circuit
Board
Layout:
The NDTU
consists
of two PCBs (host and subassem-
bly). Figure 4 shows the layout of the switches,
strapping
options, and connectors
on the host
PCB, and the LEDs on the front panel
at-
tached to the host PCB.
2) Switches:
There
is a total of 11 switches
between
the host PCB and the front panel of
the NDTU.
The function
of each switch
is
defined
in Paragraph
3.11.
3) Straps:
There
is a total of eight
strapping
options on the host PCB. The function of each
strapping
option is defined in Paragraph
3.12.
4) Connectors:
There is a total of three connec-
tors on the host PCB, and they are labeled Jl,
J2, and J3. The Jl and J2 connectors
are used
to connect the board to the backplane.
The J3
connector,
through
a coax clock cable, is used
to provide
the NTWU-3
PCB (Time Switch/
Control
Unit PCB) with a clock signal to the
NDTU.
The coax cable is provided
with the
NDTU PCB.
5) LEDs: There is a total of six LEDs located on
the front panel of the NDTU PCB. The function
of each LED is defined
in Paragraph
3.51.
3 PREREQUISITES
AND PROCEDURES
FOR INSTALLATION
3.00 General
NOTE:
Please refer to Chapter
4 in the Installation
section of the PERCEPTIONe,ex
Installation
and Maintenance
manual.
3.01 The installation
of the DS-1 trunk is described
in two sections:
1) In PERCEPTIONeLex,
see Paragraph
3.20.
2) From PERCEPTIONe,ex
tootherequipment,
such as a Channel
Service
Unit. See
Para-
graphs 3.30, 3.40, and Attachment
B.
-2-
Advertisement
Chapters
Table of Contents
