Toshiba Perception Electronic Business Communications System Installation And Maintenance Manual

							This section describes the installation
proceduresnecessary to ensure proper operation
of the PERCEPTION system.
When the PERCEPTION system is re-
ceived,examine all packages and make careful
note of any visible damage. If any damage is found,
bring it to the attention of the delivery carrier and
make the proper claims.
Check the PERCEPTION system against
the purchase order and packing slip. If it is deter-
mined that equipment is missing, contact your
supplier imm~djately.After unpacking (before the installa-
tion is started), inspect all equipment for damage.
If any damage is detected, contact your supplier
immediately.
When storing or shipping 
PCBs, be sure
re packed in their original anti-static bags for
protection against static discharge.
The PERCEPTION system requires a
power source of 90
w 125 VAC, 50/60 Hz, and has
a maximum power consumption of 500 watts.
The AC power outlet should be grounded and
separately fused.
0If reserve power is required, it must
be provided by a commercially-available 
unin-terruptable power source system (battery, charger,invet-ter).
Humidity at the central equipment
t(DCEC) location should be within 20 
w 80%
(without condensation), and the temperature
should be relatively constant within a range of
32 
~104” F (0~40” C). Exposure to dust and
airborne chemicals should be avoided.
ationsThe minimum floor and maintenance
space required for installation of the 
DCEC is
shown in Figure 
‘I.The following requirements must be
considered when selecting a location for the
DCEC:
The location
E:Dry and clean
Well ventilated
Well lit
Easily accessibleThe location
E:Subject to extreme heat or cold
Subject to corrosive fumes
Next to a reproducing or copying machine
eratio
1The operating loop limits of the sta-equipment must be considered when choosing
the location of the DCEC. The limit for each type
of instrument:
EKT (‘IO- or 20-key)-1000 cable feet (24AWG) 
						

							Conventional telephone-500 ohms (including
telephone)AI .” :/. 1
Attendant Console-1000 cable feet (24 AWG)
Acceptable cable for all telephones is
22 or 24 AWG twisted pair inside telephone
station cable, jacketed but not shielded. Two
twisted pairs are required for an EKT and one
pair for a conventional telephone.
A 
25pair cable is required for the
ant console. The console is equipped with
a male 50-pin amphenol-type connector.
The PERCEPTION system requires a
solid earth ground on the ground connection block
located behind the connector panel at the lower
rear of the DCEC (Figure 
2): Failure to provide
such a ground may lead to confusing trouble
symptoms in the system and, in extreme cases,
circuit board failure.
-In most installations,
- United States. the crrounc“third wire ground”-atwithin the continental1 provided by the
: the commercial power
outlet will be satisfactory for all PERCEPTION
requirements. However, in a small percentage
of installations this ground may be installed
incorrectly. Therefore, prior to installing a
PERCEPTION system, the third wire ground
must be tested for continuity by either measur-
ing the resistance between the 3rd prong
terminal (earth ground) and a metal cold water
pipe (maximum:
1 ohm), or by using a com-
mercially-available earth ground indicator. If
neither procedure is possible, then the test
procedures outlined in Paragraphshould
be performed.1. Obtain a suitable voltmeter and set it for a
possible reading of up to 250 
VAC.2. Connect the meter probes between the two
main AC voltage points on the wail outlet.
The reading obtained should be 90 
m 130 VAC.
3. Move one of the meter probes to the third
prong terminal 
(GND). Either the same reading
or a reading of 0 volts should be obtained.
. 
If the reading isV, leave one probe on the
GND terminal and move the other probe to
the second voltage terminal. if a reading of
OV is obtained on both voltage terminals, the
t properly grounded. Omit steps
oceed directly to step 8.
on one terminal and a 
read-7, and proceed
outlet.onone terminal and a 
read-on the other terminal
both probes from the
7. Set the meter on the”OHlVlS/Rxl”scale, place
robe on the GNterminal and the other
probe on the terminal which gave a reading
of OV. A reading of less than 1 ohm should
be obtained. 
If a reading of less than 1 ohm
is not obtained, the outlet is
grounded.
8. 
If the above tests show that the outlet is not
properly grounded, that condition should
be corrected (per Article 250 of the National
Electrical Code) by a qualified electrician
before the 
PERCEPTlON system is connected.
The central equipment cabinet 
(DCEC) 
						

							consists of a single, free-standing cabinet mounted
on casters for easy movement. Assembly of the
DCEC consists of installing the disk drive/ringing
supply subassembly (DFRA), the power supply
assembly (DPSA), and the various printed circuit
boards 
(PCBs).
5.
~stal~atio~
5.14The DFRA subassembly, housing the
Disk Drive 
(DFDD) and the ringing supply
(DRGU), is mounted on the top shelf of the DCEC.
To install the DFRA:
a)
b)
4
d)
e)
f)Loosen the 
6 screws securing the rear cover
of the DCEC and lift the cover off while
allowing the screw heads to clear the “keyhole”
provided for each screw (Figure 3).
Remove and save the 4 screws from the front
of the DCEC top shelf (Figure 4).
Unpack the DFRA and inspect it carefully
for any visible damage.
The DFRA is shipped with all cables attached
but the connectors may have worked loose
during shipping-check each connector care-
fully to be sure it is seated properly.
Slide the DFRA into place from the front
of the DCEC. Take care that its cables are
not damaged and do not cause damage.
Attach all DFRA cables to the DCEC mother-
board as shown in Figure 5. 
Thecableconnec-tors are all different sizes and each one ismarked to designate its associated jack on the
motherboard. 
						

							g) Secure the DFRA to the front of the DCEC
using the 4 screws removed earlier.h) Replace the DCEC rear cover and tighten
the 6 screws.
Power Supply installation
05.21The DPSA (Figures 6 and 7) consists of
a single metal chassis. Circuit breakers and LED
indicators for each output, along with an AC
FF switch, are located on the front panel.
An AC power cord, green ground wire and two
connectors are found on the rear of the unit.
The two connectors are labeled 
J201 and J202and will receive the two mating plugs in the DCEC.
05.22Before the DPSA is installed in the
DCEC, it should be bench tested in the following
manner:
a)Start with DPSA power switch off.
b)Plug AC power cord into AC outlet.
c)Momentarily depress each DPSA circuit breaker
to be certain that it is not tripped.
d) Place the DPSA power switch in the 
0position.
e) Verify that all DPSA power indicator 
LEDsare on. If any failures are noted, replace the
DPSA.f) The DPSA outputs are checked at the two
connectors 
(J201 and J202) on the rear (Figure
8). Each pin is plainly marked as to what
voltage should be found there. Using a digital
voltmeter (DVM) adjusted to the appropriate
range,measure between the correspondingground pins and the various voltage outputs.
(Refer to Figure 9; use -24GND pin for testing
the -24V pins, 
+5GND pin for +5V pins, etc.)
Verify that the voltages are within the fol-
lowing tolerances:
5202
(7) (1)
-RANGE 
(!/DC)NOM INAL (VDC)
-47.52w48.96-48
-23.52
rv 24.96-24
+I 1.76- 12.48+I2-11.76
rv 12.48-12
t-5.0 
N 5.4+5-5.0
IAJ 5.4-5If any failures are noted, replace the DPSA.
05.23The DPSA is installed in the bottom
shelf of the DCEC (Figure 10) as follows: 
						

							4
b)
d)Remove and save the two screws located in
the upper corners of the 
DCEC connector
panel (Figure 
1 I).Loosen the thumb screws that are provided
for securing the connector locking
the connector panel can move freely 
(FThe connector panel is hinged on the bottom;
lower it carefully to expose the internal wiring.
Locate the 
twe plastic connectors in-
tended for the
Remove the tape secur-
ing their
cablestothe bottom of the Dand ensure that they are positioned so as
be damaged or cause damage when the
e) Remove and save the four DPSA mounting
screws from the front of the 
DCEC (Figure 13).
f)Slide the DPSA in from the front of the DCE(Figure 14). Take care that the AC power cord
passes through the rear opening and that the
ground wire is not caught behind the unit.
g) Make certain that the DPSA is not crushing
any wires and then secure the front panel
to the 
DCEC using the four screws removed
earlier.
h) Plug the two connectors into J201 and J202on the rear of the
§A and connect the
ground wire to theerminalin the upper
ner of the ground connection block
ilowercord through the
slotin theleftrear of the
1)or panel with the two screws
o not install the connector
locking bar until the cables are in
nit)-one per system:
Performs the time slot interchange function
CM switching, digital padding and
conferencing.
CU (Time Control Unit)-one per system:
Provides the timing and control for the time 
						

							slot switching on the DSWU PCB and supplies
the system tones.
DCCU (Central Control Unit)--one per system:
Contains the system central processor andmain memory. Performs all system control
functions.
DPEU (Peripheral Equipment Interface Unit)-one
per system:
Performs data transmission and receiving func-
tions between the central control, and all
peripheral equipment, including:(Station 
PCBsTrunk 
PCBs
						

							L-
a
Q
3
cl
L--
cI
i“.\ “’ 
						

							2-6 (housing six circuits) is available. Only one
operated in an Immediate Start, Delay Dial,
DRCU per system is permitted.
or Wink Start mode. Each DEMU occupies
a DCOU position and, therefore, a maximum
DPMU (Paging and Music-on-hold Unit)-oneof eight may be installed in a system.per system:This 
PC6 is required in every system, and per-DEKU (Electronic Key Telephone Unit):
forms several miscellaneous functions.Interfaces eight 
EKTs to the system. It is also
used as 
thrxendant console interface. Each
Paging interface and controlattendant console utilizes one specific EKT
Music-on-hold interface
circuit.
Power Failure/Emergency transfer control
UNA signal controlATT #O-PCB position LOO circuit #IAttendant Console power transmissionATT 
#I-PCB position Ll2 circuit #IHouses program load and initialize control
switchesIf that console is not used, a normal EKT
can be connected to that circuit. A maximum
entral Office Trunkof fifteen 
(15)DCOU PCB 
interfacCO/FX/WATSstations) may be i
lines to the system. It provides the following
options on a per-circuit basis.DSTU (Standard Telephone Unit) 
:
Interfacese-ightconventional telephones (DTMFLoop or Ground Start
600- or 900-ohm terminationor rotary dial) to the system. A maximum of
fifteen (15) DSTU or DEKU PCBs (120 sta-
tions) may be installed in the system.
A maximum of eight (8) DCOU 
PCBs (32
trunk lines) can be installed in a system (see5.40
DEMU).
Install the DSWU, DTCU, DCCU, DPEU,
DEMU 
(E & M Trunk Unit):and DPMU in their proper positions per
Each DEMU PCB interfaces four E 
& M TieFigure 17. There are no options to select on these
trunks to the system. The DEMU providesPCBs; however, there are plug verifications to be
a “Type 1” 2-wire E 
& M interface with themade on the DTCU, DCCU and DPEU boards.
option of a 
600- or 900-ohm voice line ter-Refer to Figures 18, ‘I9 and 20 and verify that
mination, and, under software control, can bethe connection plugs are in place at the locations
! .>A‘ ;PI;” j I;,,l *’ 
						

							and 600/900-ohm termination options that must
be selected before they are installed:
a) Ground/Loop Start selections are made 
in-dividually for each of the four circuits using
the strapping terminals (Figure 21).shorting bar that can connect any one pair
of adjacent pins. Select the desired option
according to the following table. (Note; the
table is printed on each DCOU PCB for 
ref-erence.)
OPTIONSTRAP PINS
TB 
102-Circuit ‘ITB 
202~Circuit 2
TB 302-Circuit 3
TB 
402-Circuit 4NO EXTEND
D-EEXTEND
B-C
NORlVlALC-DLOOP START
REVERSE
A-B
b) The strapping terminal consists of five pins
labeled A, B, C, D, and E, and an insulated
c) The GROUND START “EXTEIVD/NO EX-