Toshiba Perception E Ex Digital Pbx Installation And Maintenance Manual

1 INTRODUCTION 
I .OO General Information 
1.01 
TheTl/DS-1 interface (NDTU) PCBprovides 
PERCEPTIONeLex with a capacity of up to 24 
digital circuits. Up to two NDTU PCBs may be 
placed in a PERCEPTIONeLex system, so that a 
maximum of 48 digital circuits may be placed in 
service. (Attachment A describes the Tl/DS-1 in- 
terface in greater detail.) The second NDTU PCB 
must be installed in the expansion cabinet. 
1.02 Each NDTU PCB can be programmed to 
activate 4, 8, 12, 16, 20, or 24 of the digital...

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-...

PERCEPTIONeb,, 
T-l/IX-l 
SEPTEMBER1991 
--------- 
I^ 
SUBASSEMBLY PCB 
FlGURE4-NDTU PRINTED CIRCUITBOARD LAYOUT 
3.10 Specific Switch Settings 
3.11 The initial (normal) setting of the switches is 
shown by a 
l symbol. The upper case “S” indi- 
cates the switch, and the lower case “s” indicates 
the function setting on the switch. 
1) Sl-Mode selection switch: 
sl : l ON-Robbed bit signaling (normal) 
OFF-Future operation 
s2: 
l ON-Zero Code Suppression (ZCS) 
OFF-Binary Eight Zero Suppression...

PERCEPTIONeh,, 
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SEPTEMBER 1991 
TABLE 1 
TRANSMIT EQUALIZER SETTING SWITCH 
SH&T MEDIUM LONG 
o- 150ft 
150s450ft 450 - 6.55 ft 
sl 
ON OFF OFF 
s2 OFF ON 
OFF 
s3 OFF OFF 
ON 
s4 OFF ON 
OFF 
s5 OFF OFF 
ON 
s6 
OFF ON OFF 
s7 OFF OFF ON 
s8 NOT USED 
NOT USED NOT USED 
TABLE 2-S3-NDTU SLOT POSITION 
MAIN 
EXPANSION 
TOO TO8 
CHANNELS CHANNELS 
Sl l ON l-4 
1-4 
OFF 
s2 
l ON 5-8 5-8 
OFF 
s3 l ON 9- 12 
9 - 12 
OFF 
s4 
l ON 13 ew 16 13 - 16 
OFF 
s5 
l ON 17 - 20 17-20 
OFF 
s6 
l ON 21 -24...

PERCEPTIONeh,, 
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SEPTEMBER 1991 
TABLE 3 
SIGNALING TYPE SELECTION SWITCHES 
(6 ELEMENTS DIP SW) S4 THROUGH Sll ON NOTU  

PERCEPTIONeb,, 
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SEPTEMBER 1991 
3.20 Installing NDTU 
3.21 The installation of NDTU MUST be done in 
conjunction with 
NTWU-3 and the D.O1, or higher- 
level software. 
WARNING! 
Hazardous voltage that may cause death 
or injury is exposed at the power supply 
AC terminal. 
1) Install NDTU in position TOO in the main cabi- 
net, and/or TO8 in the expansion cabinet. 
2) The NDTU PCB can support 24 trunks of 
different types (CO, DID, TIE). 
3) If all 24 trunks are used, DO NOT insert any 
PCBs in...

PERCEPTION,h,x 
Tl/OS-1 
SEPTEMBER 1991 
Trl 4 ) 2Rr 
Tt26 4 w 27 Rt 
Rr2 4 w 1 Tr 
Rt 27 4 ) 26Tt 
AMP 4 
Pe jpex + AMP 
P6X 
FIGURE 6 
REQUIRED CONNECTORS FOR DS-1 CONNECTION AT DISTANCES OF LESS THAN 655 FEET (200 Meters) 
3) Connect the DB15 connector to the CSU (see 
Table 4 and Figure 6). (Pins 2 and 4 are 
grounded within the cable.) 
4) Connect the CSU to the network through 
RJ-48C or RJ-48X, if customer is providing 
own CSU. Refer to the back of the CSU for 
network connection. 
NOTES: 
1. The...

PERCEPTIONea,, 
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channel(s) via dip switches on S3. Hardware 
faults (such as a bad channel) can cause this 
to light. 
2) BSY-Busy indication in one or more chan- 
nels. 
3) FALM-NDTU has not achieved Synchroni- 
zation (see Note 1). 
4) MFALM-NDTU has not achieved Frame 
Synchronization (see Note 1). 
5) YALM-Yellow alarm is detected by NDTU. 
6) BALM-Blue alarm is detected by NDTU. 
NOTES: 
1. Combination of FALM and MFALM is red 
alarm. 
2. If any alarms are /it, refer to the...

PERCEPTION,h,x 
Tl/DS-1 
SEPTEMBER 1991 
3) Blue Alarm: 
The blue alarm signal is used to 
inform the far end that the local site is perform- 
ing the DS-1 level loop back test. The blue 
alarm is identified as the unframed all “ONE” 
pattern for the duration of five frames. 
4) FALT LED: Indicates software-detected faults 
or a disabled state, caused by an input com- 
mand from the maintenance terminal 
(TPER 
Program), 
or while ports are programmed. 
LED indicates fault occuring in more than one...

PERCEPTIONeke, 
Tl/OS-1 
SEPTEMBER 1991 
11) Reconnect the connection to the CSU. 
3.80 Cabling 
3.81 Table 4 is provided to give cabling pin bits off 
the PERCEPTIONekex backplane. 
4 TROUBLESHOOTING 
4.00 General 
The Troubleshooting section contains flowcharts 
for diagnosing possible faults when installing aTl/ 
DS-1 interface, and performing maintenance tasks. 
To eliminate system faults, they must first be clas- 
sified, then cleared by replacing the defective ap- 
paratus. Operational tests can...