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 trunks. 
The remaining slots can be assigned to analog 
trunks, so that a mix of analog and digital trunks can 
be switched in the PERCEPTIONekex systems. 
This internal “fractionalized” use of the Tl/DS-1 
interface is unique in the industry. 
I .I 0 Requirements 
1.11 Span: 
Each PERCEPTIONe,exTl span 
requires the following configuration: 
l One NDTU PCB for each Tl span (Tl/DS-1 
interface). 
l A customer-provided Channel Service Unit 
(CSU) for each span connected to the network, 
or for a span between PBXs that are more than 
655 feet apart (see Attachment B for CSU infor- 
mation). 
l A 30 foot amphenol-type to DB15 connector 
cable (PBX-to-CSU cable) is provided with each 
NDTU. 
IMPORTANT NOTE: 
The maximum distance between 
PERCEPTION,, and the CSWDSU is 30 
feet. Toshiba provides the proper cable for 
this connection with each NDTU PCB. Its 
installation is required forproperoperation. 
I .I2 System: Each PERCEPTIONehex system 
requires the following configuration: 
l One NTWU-3 PCB. 
l D.01, or higher level software. 
l A cable between NTWU-3 and the first NDTU. 
(The cable is provided with each NDTU.) 
‘If ‘I - .A ,>H,vI-/ PERCEPTION,~,, 
Tl/DS-1 
SEPTEMBER 1991 
I .I3 Applications: 
1) A TI/DS-1 interface (span) can be connected 
to the network, and can provide up to 24 (in 
units of 4) FX, DID, TIE, and Loop Start or 
Ground Start CO trunks in any combination. A 
CSU is required for this configuration (see 
Figure 1). 
PERCEPTIONeaex 
FIGURE I-DS-1 CONNECTION TO DIGITAL 
NETWORK 
2) A Tl span can also be used to connect digital 
TIE trunks (Type I or Type II) between 
PERCEPTIONeLex and another PBX, with 
either Tl equipment, or with an analog PBX 
using channel banks (see Figure 2). A CSU is. 
required at each PBX, if the distance between 
FIGURE 2-DS-1 CONNECTION VIA CSU 
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							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. 
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							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 
(B8ZS) 
NOTE: 
Must check and match other side. 
s3: ON-Future operation 
l OFF-Normal operation 
s4: 
Not used 2) S2-Transmit Equalizer setting switch (dis- 
tancefrom PERCEPTIONe&ex to another PBX 
if CSWDSU is not used). (See Table 1.) 
IMPORTANT NOTE: 
The maximum distance between 
PERCEPTIONHex and the CSWDSU is 30 
feet. Toshiba provides the proper cable for 
this connection with each NDTU PCB. Its 
installation is required forproper operation. 
3) S3-NDTU slot position: 
The NDTU PCB can be positioned in slots TOO 
and T08, in the main or expansion cabinet, 
respectively. This switch turns on the digital 
trunks in increments of 4. To use all 24 digital 
trunks, S3-(sl w s6) must be ON. To activate 
12 digital trunks, S3-(sl M s3) must be ON. 
(See Table 2.) 
ON-Digital Trunk active 
OFF-Digital Trunk disabled 
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							PERCEPTIONeh,, 
Tl/DS-1 
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 
21 -24 
OFF 
4 NOTE: NOTES: First Second 
CO (Loop Start) mode OFF 
OFF 
CO (Ground Start) mode ON ON 
DID (2-wire loop 
signaling) ON 
OFF 
TIE line (4-wire E&M, 
type 11) OFF ON 
3.12 The straps are shown as TB(x). The x in TB(x) 
indicates the number. The 
l symbol indicates the 
strapping option present set-up. 
1) TB1 and TB2-ROM type selection: 
l l-2 3 Normal operation (64 Kbit ROM) 
1 2-3 Future (256 Kbit ROM) 
(See Note 1.) 
2) TB3 and TB4-Operation mode: 
l l-2 3 Slave mode (normal operation) 
1 2-3 Master mode (testing). (Only used in 
Digital Networking Configuration.) 
One PBX must be master, and the other(s) 
slave(s). 
3) TB5 and TBG-Loop back option: 
1-2 3 Loop back (testing) 
l 1 2-3 No loop back (normal operation) 
4) TB7-Incoming voice pad option (see Note 2): 
l 1-2 3 Through (normal operation) 
1 2-3 2dB-8dB pad (reduce sidetone 
or 
echo) 
5) TB8-Outgoing voice pad option: 
l 1-2 3 Through (normal 
operation) 
1 2-3 2dB pad (reduce sidetone or echo) 
E< 
2 ach channel has two switches. 
1. Must remain at this option in all U.S. 
installations. 
S4 - Sl 1 -Signaling type selection switches: 
The NDTU PCB can be set as one of the 
following four signaling modes. The selection 
is done per channel basis. (Table 3 shows the 
switch selection.) 2. NDTU-2A PCBs are shipped with a 2dB- 
pad. Contact Toshiba Technical Support 
department if additional padding is 
required. 
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							PERCEPTIONeh,, 
Tl/DS-1 
SEPTEMBER 1991 
TABLE 3 
SIGNALING TYPE SELECTION SWITCHES 
(6 ELEMENTS DIP SW) S4 THROUGH Sll ON NOTU  
						

							PERCEPTIONeb,, 
Tl/OS-1 
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 the next five trunk slots after TOO or 
T08. 
NOTES: 
When programming the trunks assigned to 
the NDTU PCB, please keep the following in 
mind: 
1. If the PERCEPT/ON system is NOT con- 
nected to a live Tl span, there are two 
options to consider: 
l Set the NDTU for Loop Back testing 
(see Paragraph 3.70) and program the 
trunks, or 
l Place an analog trunk PCB in slot TOO 
or TO8, and program the four circuits on 
the PCB. Then remove the analog trunk 
PCB, insert the NDTU PCB, and pro- 
gram the rest of the trunks. 
2. If the PERCEPTION system is connected 
to a live Tl span, the NDTU can be in- 
stalled and programmed in the normal 
manner, 
4) If less than 24 trunks (in multiples of four) are 
used, utilize the remaining slots for the desig- 
nated application as defined in the Installation 
section (Chapter4) of the PERCEPTIONe&ex 
installation and Maintenance manual. 5) Connect the provided coax clock cable be- 
tween the NDTU (J3) and NTWU-3 (J2) PCBs 
for the first span. 
6) If two Tl spans are used, the NDTU con- 
nected to the best clock source should be 
cabled to the NTWU-3 (primary span). 
3.30 Connecting to Channel Service Unit 
3.31 The CSU/DSU (Channel Service Unit/Data 
Service Unit) provides an electrical protection, a 
keep-alive signal, and a repeater function. The 
CSU can still be network powered per FCC require- 
ments. The DSU provides the physical conversion 
(V.35 or RS449/422 to DSI), “ONE” density, and 
D4 or ESF (Extended Super-frame) framing (see 
Figure 5 and Attachment A). 
PERCEPTIONeaex 
FIGURE 5-DS-1 CONNECTION TO DIGITAL 
NETWORK 
WARNING! 
Hazardous voltage that may cause death 
or injury is exposed at the power supply 
AC terminal. 
1) Use the cable provided with the NDTU 
PCB to connect the PERCEPTIONekex 
cabinet to the CSU. 
2) Connect the 50-pin amphenol to the PBX (see 
Table 4). 
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							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 maximum distance between 
PERCEPTION,,, and the CSV/DSU is 
30 feet. Toshiba provides for this connec- 
tion with each NDTU PCB. Its installation 
is required for proper operation. 
2. Telephone company-provided Tl willcon- 
nect to the CSU. 
3.40 Connecting to Another PBX Closer than 
655 Feet 3.41 Connecting a PERCEPTIONee, TI span to 
another PBX, in a digital TIE line (Type I or II) 
configuration and at a distance of less than 655 
feet, will require a special cable. Figure 6 shows the 
required connectors. 
NOTE: 
Transmit pair and receive pair must be sepa- 
ratedbyatleast5pairs, otherwiseABAMcoax 
cable must be used. 
3.50 Front Panel LED Overview 
3.51 The LEDs on the front panel of the PCB (see 
Figure 7) are defined as follows: 
1) FALT-Fault indication in one or more chan- 
nels caused by the software, a disabled state 
by the TPER Program, and/or disabled 
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							PERCEPTIONea,, 
Tl/OS-1 
SEPTEMBER 1991 
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 Trou- 
bleshooting flowcharts. 
YALM 
MFALM 
0 
0 
0 0 
0 0 
1 FALT 
BSY 
BALM 
FALM 
FIGURE II-LED POSITIONS 
3.60 Alarm and Status Conditions 
3.61 The NDTU PCB is equipped with six LEDs. 
These LEDs are the indicators for different alarms 
and status conditions, that are generated either 
locally or remotely. The following are the commonly 
defined alarm and status conditions in the Ti/DS-1 
interface. These alarms, LED indications, and LED definitions are also noted in Chapter 4, Paragraph 
7.00 in the Installation section of the ’ 
PERCEPTlONe&ex installation and Maintenance 
manual. 
1) Red Alarm: The red alarm is generated when 
a Loss of Signal (LOS) or Out of Frame (OOF) 
condition has occurred for a period of 2.0 w 3.0 
seconds. This alarm is identified as a locally- 
detected error, and it is a combination of the 
FALM and MFALM alarms. 
2) Yellow Alarm: The yellow alarm can be iden- 
tified as a remotely-detected alarm, as follows: 
l Superframe: When the second bit of each 
channel orthe eighth bit is forced to”ZER0.” 
YALM 
MFALM 
I FALT 
BSY 
BALM 
FALM 
FIGURE g--RED ALARM 
YALM 
MFALM 
0 FALT 
0 BSY 
-:@- 0 BALM 
0 0 FALM 
FIGURE g-YELLOW ALARM 
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							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 
channel. 
5) BSY LED: Indicates the busy/idle status of 
the 24 channels on the NDTU PCB. LED is ON 
when one or more channels are busy. 
0 FALT 
0 BSY 
YALM 
0 -:q- BALM 
MFALM 0 0 FALM 
I 
FIGURE lo-BLUE ALARM 
-@- 
FALT 
0 BSY 
YALM 0 0 BALM 
MFALM 0 0 FALM 
1 
FIGURE ll-FALT LED 3.70 Loop Back Procedure 
The following procedure describes how the loop 
back testing is conducted: 
1) Disconnect the NDTU from the Channel Ser- 
vice Unit (CSU). 
2) Remove the NDTU from the PERCEPTION 
system. 
3) If they have not been set that way, change TB3 
and TB4 to master mode, position 2-3. 
4) Set TB5 and TB6 to master loop back, position 
l-2. 
5) Reinstall the NDTU in the PERCEPTION sys- 
tem, and allow it to sync up. 
6) If all the LEDs on the NDTU go out, the loop 
back test has passed. If any of the LEDs stays 
on, replace the NDTU. 
7) Remove the NDTU from PERCEPTION. 
8) Return TB3 and TB4 to their original settings. 
9) Return TB5 and TB6 to their original settings. 
10) Reinstall the NDTU in the PERCEPTION sys- 
tern. 
YALM 
MFALM FALT 
BSY 
BALM 
FALM 
FIGURE IP-BSY LED 
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							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 then be performed 
to verify correct apparatus operation. The flow- 
charts must be followed in the sequence they are 
arranged. 
Start and end of flowchart 
sequence. 
Important notes affecting 
_____ 
the fault clearing 
procedure. 
Question to be answered 
YES or NO. 
Progression TO or FROM 
another flowchart. Page 
numbers indicate the 
location of the flowchart 
within this bulletin. Letters 
and numbers denote the 
exact entrance or exit point 
in the flowchart. 
0 
Statement of a required 
action. 
FIGURE 13-FLOWCHART SYMBOLS 
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