Mitel sx-100 User manual

sx-loo@
sx-200@
VOLUME IV
(GENERIC
f

sx-200
WARNING
This equipment generates, uses, and can radiate radio frequency en-
ergy and, if not installed and used in accordance with the instructions
manual, may cause interference to radio communications. It has been
tested and found to comply with the limits for a Class A computing
device pursuant to Subpart J of Part 15 of FCC Rules, which are
designed to provide reasonable protection against such interference
when operated in a commercial environment. Operation of this equip-
ment in a residential area is likely to cause interference, in which case
the user, at his own expense, will be required to take whatever mea-
sures may be required to correct the interference.
sx-100
WARNING
This equipment generates, uses, and can radiate radio frequency en-
ergy and, if not installed and used in accordance with the instructions
manual, may cause interference to radio communications. It has been
tested and found to comply with the limits for a Class A computing
device pursuant to Subpart J of Part 15 of FCC Rules, which are
designed to provide reasonable protection against such interference
when operated in a commercial environment. Operation of this equip-
ment in a residential area is likely to cause interference, in which case
the user, at his own expense, will be required to take whatever mea-
sures may be required to correct the interference.

MlTEL STANDARD PRACTlCE
PNI 91 O-21 7-350~003-NA
SECTION MITLSI OS/91 1 O-096-350-NA
Issue 3, May 1984
(
sx-100”/sx-200”
SUPERSWITCH”
ELECTRONIC PRIVATE AUTOMATfC BRANCH EXCHANGE
TROUBLESHOOTING
GENERIC 217
CONTENTS PAGE
l.GENERAL ..........................................
1
Introduction .......................................
1
Reason for Reissue ................................. 2
The SUPERSET 3TM and SUPERSET qTM Sets ............... 2
Basic Troubleshooting Philosophy ...................... 2
c. .
2. CIRCUIT CARD AND MAINTENANCE PANEL AIDS ........... 2
CardShelf
......................................... 2
IPC Card ........................................... 3
Scanner Card ...................................... 3
Tone Control Card .................................. 5
Console Control Card (Basic) .......................... 9
Console Control Line and Data LEDs .................... 9
Remote Control RMAT .............................. 10
Receiver Card ...................................... 10
TrunkCard
...................................... .
10
Standard Line Card .................................
11
The SUPERSETTM Line Card ........................... 11
RAC
............................................. 11
Maintenance Panel ................................. 11
Cards External to the Shelf .......................... 13
The SX-200 Interconnect Card ........................ 13
The SX-200 Power Fail Transfer Card ................... 15
The Console Interface Card .......................... 15
Shelf Backplane ................................... 15
3. CONSOLE AND TEST LINE MAINTENANCE FUNCTIONS ....... 19
Console Maintenance Functions ......................
19
ALARM RESET Button ............................... 22
IDENT Button ..................................... 22
Error Codes ....................................... 23
Power Fail Transfer Switch ........................... 23
Test Line Functions ................................ 23
Direct Trunk Access ................................ 24
To Busy and Clear Busy-Out Receivers and Speech Paths . . 25
Clear All Errors ..................................... 25
Select a Speech Path and/or a Receiver ................ 25
Slot Initialization Activate ........................... 26
Forced Trunk Release ............................... 27
Copyright of MITEL Corporation 1984
TM - Trademark of MITEL Corporation
@‘Registered Trademark of MITEL Corporation
. .
I

SECTION MITL91 OS/91 1 O-096-350-NA
CONTENTS (CONT’D)
‘-
PAGE
(
4. CONSOLE FUNCTIONS AND ERROR CODES ............... 27
Current Speech Path Display ......................... 27
Line and Trunk Status Display ........................ 27
5. SYSTEM OPERATION ................................ 53
General .......................................... 53
Extension Operation ................................ 53
Console ......................................... 58
Dialing a Trunk (From a Console) ...................... 58
Hook-Flash ....................................... 60
Incoming Calls (GS/LS Trunks) ........................ 60
SUPERSET 4 Set Operation ...........................
61
Tables ........................................... 65
6. SX-lOO/SX-200 POWER SUPPLY ....................... 72
AC/DC Converter .................................. 72
DC/DC Converter .................................. 72
Ringing Generator ................................. 72
Out-of-Tolerance .................................. 72
Reserve Battery Backup and Charger ................... 73
Fusing ........................................... 73
7. REMOTE MAINTENANCE,
ADMINISTRATION AND TEST SYSTEM . . . . . . . . . . . . . . . . . 83 \
RMAT System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
APPENDIX A
MITEL ACTION PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . A-l
APPENDIX B
SYSTEM OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-l
APPENDIX C
SYSTEM CABLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-l
APPENDIX D
SX-100 MECHANICAL INFORMATION . . . . . . . . . . . . . . . . D-1/2
APPENDIX E
SX-200 MECHANICAL INFORMATION . . . . . . . . . . . . . . . . . E-1/2
APPENDIX F
POWER CHECKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1/2
APPENDIX G
TROUBLESHOOTING MAPS . . . . . . . . . . . . . . . . . . . . . . . . G-1/2
APPENDIX H
The SUPERSET 4 Set . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . H-l
,”
ii

SECTlON MITLSI 05/91
IO-096-350-NA
:_ _-
CONTENTS (CONT’D)
PAGE
APPENDIX I
The SUPERSET
3 Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-I
i
FIGURE TITLE
PAGE
2-I
2-2
2-3(a)
2-3(b)
2-4
2-5
2-6
2-7
2-8
2-9
2-10
3-1
3-2
3-3
3-4
4-l.
5-I
5-2
5-3
5-4
5-5
5-6
6-I
6-2
6-3
6-4
6-5
6-6
6-7
Equipment Shelf ............................
Equipment Cards ............................
Circuit Cards ...............................
Circuit Cards ...............................
Maintenance Panel .........................
SX-200 Interconnect Card ....................
SX-200 Power Fail Transfer Card ..............
SX-200 Console Interface Card ................
SX-100 Interconnect, Console Interface,
Power Fail Transfer Card ...................
Backplane ................................
Equipment Shelf ...........................
Attendant Console .........................
Typical Readout ...........................
Typical Identification Display ..................
Receiver Equipment Numbers ..................
Programming Overlays ......................
Speech Paths .............................
Select a Speech Path .......................
Inside Call ................................
Outside Call - 0 and 1 Dialing Restriction .......
Outside Call - Multi-Digit Toll Control, or
SMDR or ARS in Effect ....................
Equipment Numbering ......................
SX-100 Equipment Cabinet and Power Supply
....
SX-200 Power Supply .......................
SX-100 Interconnect Card ....................
SX-200 Back Door Electrical Schematic .........
SX-100 Reserve Battery Backup ...............
Reserve Battery Charger .....................
Power Supply Block Diagram .................
LIST OF TABLES
TABLE TITLE
PAGE
2-1 Scanner Displays ............................
2-2 Switch Settings .............................
2-3 Outgoing/Incoming Switch Settings ............
2-4 External System Cards .......................
2-5 Connectors P302, 5302 and J303
...............
2-6 Interconnect Card Equipment Terminations
......
LIST OF ILLUSTRATIONS

SECTION MITL9105/911 O-096-350-NA
TABLE
4-l
4-2
4-3
4-4
4-5
4-6
4-7
4-8
4-9
4-l 0
4-11
4-12
4-l 3
5-l
5-2
5-3
5-4
5-5
5-6
LIST OF TABLES (CONT’D)
c’
TITLE
PAGE
Supervisor Function Access Codes ............. 32
Maintenance Function Access Codes ........... 35
Traffic Measurement Function Codes ........... 36
Error Codes ............................... 37
Standard Programming Error Codes ............ 40
Standard Programming (Confirm) Codes ........ 43
Extended Programming Toll Programming Errors . . 44
Extended Programming Toll Control Confirm
Codes .............. ..‘. ................ 45
Extended Programming Speed Call Error Codes ... 45
Extended Programming Automatic Route Selection
Programming Error Codes .................. 46
Automatic Route Selection Confirm Error Code , . . 46
Extended Programming Error Codes -
SUPERSET Programming ................... 47
Attendant UCD Access Codes .................
51
Table Listing for Troubleshooting ............. 65
Error Code Procedures ...................... 66
Extension Fault Report Procedures ............. 68
Console Faults ............................. 69
Trunk Fault Report Procedures ................ 70
System Faults ............................. 71
..
iv

SECTION MITL91 OS/91 1 O-096-350-NA
1. GENERAL
Introduction
1.01 This Section contains information to be used when trouble-
shooting the SX-lOO/SX-200 Automatic Call Distribution Sys-
tem. The Practice is divided into seven parts and nine appendices:
a
Part 1. General - gives a brief outline of the Practice and a
general introduction to the troubleshooting philosophy.
l
Part 2. Maintenance Aids - describes the maintenance aids
provided by the system and gives a description of each indica-
tor, switch and display.
l
Part 3. Console and Test Line Functions - contains a descrip-
tion of the maintenance functions which can be dialed from the
console or the test line.
l
Part 4. Error Code Troubleshooting - describes the trouble-
shooting procedures to be used in conjunction with the system
error code displays.
l
Part 5. Fault Report Troubleshooting - this Part details trou-
bleshooting procedures to be used when no error code is re-
ported.
l
Part 6. SX-lOO/SX-200 Power Supply Specifications - defines
the electrical and operational specifications for the SX-
1 OO/SX-200 system power supplies.
0
Part 7. RMATS - this Part briefly discusses RMATS. For further
information, see Section MITL9105/91 lo-098-lOl-NA.
l
Appendix A - MITEL Action Procedures (MAPS).
a
Appendix B - provides a series of tables of all system param-
eters.
l
Appendix C -
provides installation and cabling information for
the SX-lOO/SX-200 system.
lAppendix D
- contains the mechanical information pertaining
to the SX-100 system in the form of MAPS and tables.
0
Appendix E - contains the mechanical information pertaining
to the SX-200 in the form of MAPS and tables.
l
Appendix F - contains all power checks pertaining to the
SX-lOO/SX-200 system in the form of .MAPs and tables.
0
Appendix G - details, in the form of MAPS, the procedures
required to locate and fix malfunctions in the systems.
Page 1

SECTION MITL9105/91 lo-096-350-NA
lAppendix H
- gives a brief description of the SUPERSET 4 set,
including physical characteristics and electrical and environ-
(+-- :
mental specifications.
lAppendix I
- gives a brief description of the SUPERSET 3 set,
including physical characteristics.
Reason for Reissue
1.02 This Section has been reissued to include additional UCD
(Uniform Call Distribution) information.
1.03 It should be noted that certain sections and appendices must
be used as interlocking information for complete troubleshoot-
ing.
The SUPERSET 3 and SUPERSET 4 Sets
1.04
For test information on the SUPERSET 3 set or the SUPERSET 4
set, see Section MITLS 105/g 11 O-096-320-NA. For Engineering
Information on the SUPERSET 4 set, see Section MITL9105/9110-096-
180-NA.
Basic Troubleshooting Philosophy
1.05 The SX-lOO/SX-200 system employs automatic diagnostics
which, in most cases, can pinpoint faults to a specific printed
circuit card. A system malfunction is generally corrected by the re-
placement of an indicated faulty circuit card with a known (good)
spare. Should the need arise, the actual shelf backplane or power
supply may be easily replaced by a new unit. The tables, MAPS and
explanations in this Practice should be sufficient in most ‘cases to
cover any problems which may arise in the field.
’
1.06 Actual field repair of components on cards, shelves or power
supplies is never done. All defective units should be returned to
MITEL, as per Section MlTL9105/911 O-096-200-NA.
2. CIRCUIT CARD AND MAINTENANCE PANEL AIDS
2.01 The SX-lOO/SX-200 system is equipped with various main-
tenance aids that will be of assistance to the repair person
troubleshooting the system. This Part is a card-by-card description
with specific reference to all indicators, switches and fuses on the
cards. In addition, the connectors and switches on the maintenance
panel are also described.
Card Shelf
. .
2.02 Figure 2-l illustrates the card locations in the equipment shelf
or shelves. A visual display of all cards is shown in Figures 2-2,
2-3(a) and 2-3(b). Fuses on the backplane of the shelf are described in
\
paragraph 2.25.
Page 2

2.04 The IPC (Integrated Processor Control) contains all operating
software in the form of PROM and RAM and the microprocessor
(68A09).
There is 160 kbytes of PROM and 48 kbytes of RAM. Of the 48
kbytes of RAM, 34 kbytes are write-protected and the remaining 14
kbytes are not write-protected. All customer memory is protected
from power failure by a card-mounted battery pack When an IPC is
shipped, the batteries are turned off (see Set
:tion MITL9105/9
l lO-096-
350-NA). The batteries must be turned on
before the IPC can be
programmed. The actual Generic information
is contained in the PROM
and is non-volatile (see Figure Z-2).
2.05 There is a RAM Load button that will
enable a RAM data load
from a recording device. This card also contains a LED that will
be lit to indicate that the RAM batteries are charging. In addition to the
RAM batteries LED, there are three other LEDs:
SECTION MITL91 OS/91
lo-096-350~NA
!-
2.03 Both the SX-100 and SX-200 systems employ a minimum
num-
ber of cards in the card shelf (Figure 2-2 and Figures 2-3(a) and
(b)). These cards may be used in either system, minimizing stocking
and control problems for field maintenance.
IPC Card
1.
The top LED, when flashing, indicates that the automatic diag-
nostics are running. The LED will not flash (the diagnostics do
not run) when the system is in Programming Mode, or when
less than four speech paths are idle. Under these circumstances
the LED may be on or off; its state has no special meaning.
2.
The second LED, when lit, indicates that the system is in the
programmable mode.
3.
The third LED, when lit, indicates that the RS-232 port is in use.
4.
The fourth LED if supplied, when lit, indicates that the system is
functioning normally.
Scanner Card
2.06
The Scanner card (Figure 2-2) contains a 2-digit display which
is used to display faulty card positions. It may be used in
conjunction with the test line to display the status of selected circuits
and to support the customer data Load and Dump. The 2-digit display
is read from top to bottom. If a card is malfunctioning, the display will
show the position number of the faulty card (01-22 for equipment
shelf 1, and 31-42 for the SX-200 equipment shelf 2).
2.07
When used in conjunction with the test line, the display shows
the status of the receiver and/or the speech path which has
been selected. The top display shows the receiver status and the
bottom display shows the speech path status. The customer data can
be dumped or loaded in blocks. The displays used are shown in Table
2-l. This card also contains the night bells and night service relays.
Page 3

SECTION MITL91 OS/91 lo-096-350-NA
I2 34 5678910 11 12 13 14 15 16 17 18 19 20 21 22
a
L
-
-
.._
-uNE6. TRUNKS-
FRONT VIEW
SHELF 1
I
x5209
Figure 2-l Equipment Shelf
Page 4

SECTION MITL9105/911 O-096-350-NA
(..A
TABLE 2-l
SCANNER DISPLAYS
Display Meaning
A Available - not in use
C Conversation - in use
E Error - found faulty by diagnostics
F Found - in use by test line
0 Optional - no specific circuit selected
AA Beginning of Data Load
01-99 Each Record increments
00-30
Scanner display
EE Checksum Error on Data Load
2.08 The Master Reset button is used in the initial programming
process as part of the RAM clearing procedure and may also be
used to reset the system. When the Master Reset button is pressed,
the processor is momentarily turned off, all existing calls are dropped,
and all system crosspoints are released. The processor then starts, and
the diagnostics begin operating, in the same manner as when the
system power is first turned on.
2.09 The Baud Rate switch selects the RS-232 port baud rate as
either 300 or 1200 baud. The number of stop bits, parity and
word length is determined by the DIP switches on the face of this card.
Tone Control Card
2.10 This card provides dial tone, busy tone, ringback tone and
miscellaneous tone, along with two DTMF generators and two
rotary dial generators which are used for diagnostic tests. The DTMF
generators are also used when dialing from the console. The four
thumbwheel switches used with the test line and programming are
also located on the tone control card. In addition, the circuits for Page
1 and Page 2 outputs, and the Music-on-Hold inputs are located on
this card (see Figure 2-2).
2.11 Tone Control Thumbwheel Switches. The four thumbwheel
switches on the Tone Control card are used in conjunction with
programming, maintenance and load functions. The number settings
read from top to bottom. Programming functions are shown in Table
2-2.
(a) Maintenance Functions: The thumbwheel switches may be
used in conjunction with the test line to select receivers and
speech paths. The top two switches are used to select a re-
ceiver by setting the switches to the last digits of the required
receiver equipment number (even numbers only, 90-20). If set
to 99, any free receiver will be selected. The bottom two
switches are used to select a speech path (01-31 for speech
paths, or 32 for the Music-on-Hold speech path). If set to 99,
any free speech path will be selected. When not using the test
Page 5

SECTION MITL9105/911 O-096-350-NA
.:.
.:...
-.
.
I..
300/1200 BAUD _
. .
, :i
/ -.l
ON THE SIDE OF ’
THE CARD:
STOP BIT,
PARITY WORD
c=
.ENGTH SWITCHES
SCANNI
CARD
DATA
-- OUTPUT
INDICATOR
ER
CONSOgRNTROL IPC
CARD
E
1
I I
$
l.LED INDICATES RCP CONNECTED l.LED INDICATES RCP CONNECTED
::
4-
AND DATA BEING SETAND DATA BEING SET
--Z.LED LIT, INDICATES DIAGNOSTICS --Z.LED LIT, INDICATES DIAGNOSTICS
‘5.LED LIT, AL3 (CHECKSUM OR RAM ‘5.LED LIT, AL3 (CHECKSUM OR RAM
FAILURE DURING 1NITlALIZATlON) FAILURE DURING 1NITlALIZATlON)
THUMBWHEEL
SWlTCHES
WRITE-
_ PROTECT
AND BUSV-
OUT SWITCHES
CHANNEL
INDICATORS
RMAT REMOTE
QUAD- DUAL-
TONE LINE
CONTROL CARD RECEIVER CARD RECEIVER CARD CONTROL CARD
CARD
x6496
Figure 2-2 Equipment Cards
Page 6

SECTION MITL9105/911
O-096-350-NA
1.
(..:-.
TWO VERSIONS OF CO TRUNK CIRCUIT CARD 91 lo-01 l-000 DO EXIST
TRUNK CONTROL SWITCHES
BUSV SWlTCJiES
TRUNK 3
LOOP/GROUND
START SWITCHES
THIS IS A NONMODULAR CO TRUNK CARD.
IT HAS THE A6ILIT-V TO MAKE FOUR
INDIVIDUAL TRUNKS EITHER LOOP OR
GROUND START.
9110-011-000 (MODULAR)
TRUNK CONTROL SWITCHES
lOlm_l.rUmll 1 BUSY SWITCHE$
LOOP/GROUND
START SWITCHES
THIS IS THE MODULAR CO TRUNK CARD.
FOUR INDIVIDUAL TRUNKS MAV BE SET
FOR EITHER LOOP OR GROUND START.
TWO VERSIONS OF E&M TRUNK CIRCUIT 9710-013-000 DO EXIST
9110-013-000
1
c
I
600 OHMS I
P-WIRE
J
/4-WIRE i-i Lii 900 II II
L
OH
TRUNK CONTROL SWITCHES
IOIOlnnTmj,
BIJSV
I
SWITCHES
,
SD0 OHMS
I
MOTHERBOARD
/
1 TRUNK IMPEDANCE SWITCH 1
i,,: 900 OHMS 1 r”ll
2-/4-WIRE
SWITCH
Ill
TRUNK CONTROL SWITCHES
’ 10~ 1
I
\ I
TRUNK lM+NCE SWITCH 1
1 I
2-/4-WW;SWlTCH
/
MOTHERBOARD
THIS IS A MODULAR E&M TRUNK CARD.
TWO E&M TRUNK CIRCUITS ARE ACCDMMODATED.
THE TRUNKS MAV BE SET FOR WINK START.
STOP DIAL. 2- OR 4-WIRE OPERATION. SPEClAL
GAIN AND 600 OHMS OR 900 OHMS IMPEDANCE.
X1296R3
Figure 2-3(a) Circuit Cards
Page 7

SECTION MITL91 OS/91 1 O-096-350-NA
. __. ._
EXTERNAL EQlJ
9110-211-000 HIGH
lMPED\NCE BUSY “;
TRUNK CONTROL SWITCHES _
10 IJiiml 1
BUSY SWITCHES
/I
THE 9110-211-000 IS A TRANSFORhiER TRUNK
CARD ACCOMMODATING FOUR CO TRUNKS.
-031-000
GND
[TRUNK 2 IMPEDANCE SWITCHES
TRUNK CONTROL SWITCHES
BUSY SWITCH
THIS IS A MODUIAR DID/TIE TRUNK CARD.
TWO DID OR TIE TRUNKS ARE ACCOMMODATED.
TRUNKS CAN BE SET FOR WINK START, INCOMING
DIAL - OUTGOING AUTO AND DEIAV DIAL.
Figure 2-3(b) Circuit Cards
Page 8

SECTION MITL91 OS/91 lo-096-350-NA
line for maintenance purposes, the switches should be set-to
8888.
: .:
I..._.
.I-
,. .
:.
(: :
(b) Load Functions: The Customer Program Dump/Load Function
requires the switches to be set to 5523 to initiate a load from
an external storage device.
TABLE 2-2
SWITCH SETTINGS
Switch
Settings
7770
7771
7772
7776
XXXn
777n
5623
Function
Enter Maintenance Console into
programming mode
Enter Supervisor Console 1 into
programming mode
Enter Supervisor Console 2 into
programming mode
Initialize System Configuration (Clear
RAM)
Take any console out of programming
mode (one of the X = any digit except 7,,
n = O-9)
Enables reset from test line (n = O-2);
Dial 555-6
Load Function
Console Control Card (Basic)
2.12 The console control card provides the interface between the
system and two consoles. Console control card number -1
(position 17) is allocated to the maintenance console connector and
the Supervisor console number 1 connector. Console control card
number 2 (position 16) is allocated to the Supervisor console number 2
connector. The card provides both voice and data signals to and from
each console (see Figure 2-2). To identify the console, the operator
may press the IDENT button. The last segment in the DESTINATION
Display identifies the console as 0 for maintenance, 1 for console 1, or
2 for console 2.
Console Control Line and Data LEDs
2.13 LINE 1 and LINE 2 LEDs, when lit, indicate that the associated
console is active (i.e., the handset or headset is plugged in). The
designations 1 and 2 refer to the two consoles handled by the card.
The maintenance console will appear in slot 17, line 2. Console 1 will
appear in slot 17, line 1. Console 2 will appear in slot 16, line 1. Line. 2
in slot 16 is not used. The data LEDs indicate voice pair continuity to
the console(s). The LEDs labeled DATA 1 and DATA 2 flicker whenever
data is transmitted from the corresponding console to the console
control card (data is transmitted when any console button is pressed).
Page 9

SECTION MITL9105/911 O-096350-NA
._ -:. : Remote Control RMAT
2.14 The Remote Control System (RCP) card, can be fitted in slot 16
of the System shelf to provide the System console button
functions remotely, under the control of the RMAT Controller (see
Section MITL9105/9110-98-101-NA). The main components of the RCP
card are as follows:
lThe Micro-Processor Unit (MPU), which acts on commands re-
ceived from the RMAT Controller via the modem.
0
MEMORY PROM/RAM, which contains programmed memory and
scratch pad memory for storage and execution of commands.
0
MODEM, which provides the necessary tone transmitter and
receiver, and contains the handshaking circuitry required to
interface the MPU with the external 2-wire line.
a
TRUNK INTERFACE, to provide the proper termination to the line
with regard to impedance, ringing and supervisory condition.
lMASTER/SLAVE INTERFACE, to enable the MPU to access the
System data bus and control lines.
Receiver Card
2.15 The dual-receiver card has two rotary dial and two DTMF re-
ceivers. Having received each dialed digit, the receiver informs
the processor and prepares for the next digit. The dual-receiver card
contains no LEDs or switches. The quad-receiver card contains four
rotary dial, four DTMF receivers, four dial tone detectors, and four sets
(two each) of LEDs labeled Al Bl, A2 82, A3 83 and A4 B4. In each
case, the A LED indicates a busy condition and the B LED indicates a
busied-out condition.
Trunk Card
2.16 The Trunk card contains either two or four trunks depending
upon the trunk type (Figure 2-3 - four CO Trunks, two E&M Tie
Trunks, or two DID Trunks per card). These circuits provide the inter-
face between the system and the Central Office, other systems, or
other equipment. Each trunk circuit repeats dial pulse signals from the
speech path to the Tip and Ring and passes DTMF signals directly from
the speech path to the trunk for outgoing calls. The busy switches on
the trunk card may be used to make a trunk continuously busy. If the
trunk is in use when the switch is set, the existing call is not disturbed.
For exact details of the trunk busy switches, see Table 2-3.
(a) Trunk Busy/Idle LEDs: Each trunk circuit has associated with
it a LED which shows the busy/idle status of the trunk as
follows:
,’
- Trunk circuit idle - LED OFF
- Trunk circuit seized - LED ON
Page 10

SECTION MITL9105/91
lo-096-350-NA
-
LED FLASHING (by switch on card
(b) Trunk Incoming and Outgoing Busy Switches: Associated
with each trunk circuit are two busy switches: one for making
the trunk busy outgoing and one for making the trunk busy
incoming. Table 2-3 lists the switch settings and describes their
effect.
Standard Line Card
2.17
The Line card contains eight separate line circuits. The line
circuit detects on- and off-hook conditions, which are recog-
nized by the scanner and reported to the processor for appropriate
action. Dial signals (rotary dial or DTMF) are passed over the speech
path selected for the conversation (see Figure 2-2). The LED on each
line circuit provides an indication that the line circuit has detected an
off-hook condition. The LED is driven directly from the off-hook detect
circuit in the line circuit. It turns ON when an off-hook condition is
detected and will flash when dial pulses are sent.
The SUPERSET Line Card
2.18 The SUPERSET 3 set or the SUPERSET 4 set requires a
SUPER-
SET Line card that is not compatible with standard telephone
sets. The card contains eight separate line circuits with eight
LEDs
indicating on-/off-hook conditions. The line circuits act as interfaces
between the SUPERSET
sets and the system CPU (Central Processor
Unit). The system processor continually polls all line circuits to deter-
mine calls for service, time updates, messaging, etc. No actual dial
signals are sent between the SUPERSET 3 set or the SUPERSET
4 set
and the system, as all communication is digitally sent. For further
information, see Section MITL91 OS/91 10-096-l 80-NA.
RAC
2.19
The Recorded Announcement Card (RAC) occupies one periph-
eral slot in the system and provides two different 8 second
recordings using digital solid-state storage. Messages are recorded on
the Supervisor’s console. If required, the two 8 second messages may
be linked to provide one 16 second message. In the front faceplate of
the card there are eight DIP switches. The first four switches may be
used to busy out a particular channel (two channels per recording).
The fifth and seventh switches are the write-protect switches. These
switches may be set to disable recording. In addition there are four
indicator LEDs (one per channel) that are lit when a channel is
busied-
out or in use.
Maintenance Panel
2.20
At the top of the equipment cabinet -is the maintenance panel
(Figure 2-4). This panel provides the service personnel with
access to the system through the maintenance console connector and
test line terminals. Also housed on the maintenance panel are the six
Page 11

_. . ..‘..
SECTION MITL91 OW911 O-096-350-NA
MAINTENANCE CONSOLE CONSOLE POWER COMMON MASTER
CONSOLE NO 1 NO 2 SUPPLY CONTROL SWITCH
\ I
5
\
!
/ /
SYSTEM POWER TIP RING
“” ,’ ?EST L,NE”
. ENABLE ,
DISABLE FRANSFER
7
/L
t
MAINTENANCE CONNECTOR
i
\
POWER FAIL TRANSFER CONTROL SWITCHES
POWER ON LED
Figure 2-4 Maintenance Panel
X20BR3
Power Fail Transfer Control Switches, a System Power ON/OFF switch
and a Power ON LED.
C”
(a)
(b)
(d
(d)
Maintenance Console Connector: This connector is provided
to allow the installer/repair person to plug in a console for
administration and test purposes: i.e., to program changes in
system data.
Power Fail Transfer Control Switches: These switches are
used to control the source of a power fail transfer. A Power Fail
Transfer (PFT) may be caused: by a common control failure, by
a power failure, by the operation of a failure transfer switch’on
one of the consoles, or by operating the Master Transfer Switch
on the maintenance panel. The switches have two positions:
ENABLE and DISABLE. When set to ENABLE, the system allows i
power fail transfer to be initiated from the designated source.
When set to DISABLE, the designated source cannot initiate
power fail transfer; e.g., with the COMMON CONTROL power fail
transfer control switch set to ENABLE, a common control failure
will cause a power fail transfer. The MASTER power fail transfer
switch will set the system to power fail transfer when operated
to the TRANSFER position. The switches associated with each
console must be set to disable when that console is not in use.
If the transfer switch on a console will never be used, the
transfer enable switch may be left in the disable position at all
times.
Test Line Terminals: The test line TIP and RING terminals may
be used in conjunction with a test set (butt-in) and the thumb-
wheel switches on the tone control card, to access individual
speech paths, receivers, trunks, and lines for test purposes. The
test line also has the capability of resetting system errors,
initializing card slots, busying out and debusying receivers and
speech paths and controlling the printer port. See Part 3 for a
full description of the use of the Test Line.
The System Power: This switch has the ability to turn the
shelf power on or off. Note that this does. not turn the power
supply off, but the system will go into a Power Fail Transfer.
The system power should be disconnected from the commer- .-
cial AC source (or DC if -48 Vdc fed) before any power supply
c
maintenance is attempted.
Page 12

SECTION MITL9105/911 O-096-350-NA
TABLE 2-3
L
: OUTGOING/INCOMING SWITCH SETTINGS
Trunk Busy Switches:
1. Outgoing busy switches (one per trunk) can be set for either of the following conditions:
ldle Setting - Normal trunk operation.
Busy Setting - Trunk cannot be seized for outgoing call.
If the switches are not set in this manner, “Ring - Don’t Answer”, may occur.
’ 2. The “Outgoing .Busy” condition may be set either by the outgoing busy switch, or by the
console ‘Trunk Busy-Out” function. When this condition is in effect, the incoming busy switch
affects the trunk condition ‘as follows:
Idle Setting - No answer will be given to incoming CO calls.
Busy Setting - A permanent seizure condition is given towards the CO when
the trunk is seized for the first line.
For further information, see Sections MITL9105/911 O-096-200-NA and MITLg105/9110-096-
210-NA.
Cards External to the Shelf
2.21 There are a number of cards that are external to the equipment
shelf (shelves). These cards, and the system they are part of,
are listed in Table 2-4.
.
f -. :’
The SX-200 Interconnect Card
2.22 The SX-200 Interconnect Card (Figure 2-5) provides a direct
connection between the consoles (J13, J14 and J15) and the
shelf backplane (P16 and P17). This board also contains the console
fuse for protection of the console. Directly opposite the fuse is the
RS-232 printer port J302. For a complete description of this port, see
Section MITL9105/91 lo-096-450-NA and Table 2-5. Plugs P301 and
P303 are the maintenance panel connector and the power supply
out-of-tolerance monitor, respectively. All power for the Interconnect
card is supplied through the power supply terminal block TB301 on the
board. Plugs J13, J14 and J15 are the console plugs. Plugs P16 and P17
provide interconnection between the Interconnect card and the shelf
backplane. Plugs P18 and P19 provide a connection between the Inter-
connect card and the Cross-Connect Field. P18 carries Night Bell Con-
tacts, Music on Hold, Tip and Ring for RMATS and Paging access
circuitry. P19 carries Tips and Rings for the card shelf slots 13 and 14.
TABLE 2-4
EXTERNAL SYSTEM CARDS
Card
Interconnect
Power Fail Transfer
Console Interface
sx-200 Figure sx-100 Figure
1 card 2-5 1 card 2-8
1 card 2-6 combined
1 card (or 2, 2-7
sx-200)
Page 13

SECTION MITL9105/911 O-096-350-NA
._ :.
-.:_
:
TABLE 2-5
‘.
CONNECTORS P302, 5302 and J303
Page 14