Mitel SX 200 ML PABX Instructions Guide

							System Overview 
DNIC Music-on-Hold/Paging Unit: The DNIC Music-on-Hold/Paging Unit (DMP) can 
be wall-mounted next to the SX-200 ML PABX. It is powered by the SX-200 n/lL PABX, 
and does not require a separate power source. A single 25 pair amphenol connects 
to the SX-200ML PABX via the main distribution frame. A single LED indicator provides 
basic status information. The DMP interfaces a standard SX-200 ML DNIC port to the 
following external equipment: 
l External music source for Music on Hold 
l External paging amplifier (with or without answerback capability) 
l Up to two night bells, and 
l An external alarm. 
Data Capabilities 
MITEL datasets provide data facilities for terminals, digital SUPERSETtelephones, 
and other types of data circuits. The DATASET 1100 series support asynchronous data 
communications at rates up to 19.2 kbps and interface with the SX-200 DIGITAL PABX 
through a Digital Line Card. The DATASET 2100 series support asynchronous and 
synchronous data communications at rates up to1 9.2 kbps and interface with the PABX 
through a Digital Line Card. 
MlLlfVKData Module: The WQVKData Module is connected to a modularjack located 
on the base of SUPERSET 10, SlJPERSET420, or SUPERSET telephones, and 
is used to interface a terminal, personal computer, or other peripheral device to a host 
computer. The I\/lIL/AKData Module interfaces to the PABX Digital Line Card through 
the same pair of wires that the telephone set voice circuit uses. 
DATASET 1103 Standalone: The DATASET 1103 Standalone is packaged in a flat 
case which can be placed under a standard desk telephone set. It is functionally the 
same as one-half of the DATASET 1102 Dual Rack Mounted Card. 
DATASET 2103 Standalone: The DATASET 2103 Standalone is a Synchro- 
nous/Asynchronous data set which is used with Mite1 digital private automatic branch 
exchanges (PABX) to interface peripheral devices to the PABX. It is packaged in a flat 
case which can be placed under a standard desk telephone set. The DATASET 2103 
Standalone can be connected to a Digital Line Card within the PABX by a single twisted 
pair (the telephone set is connected independently). 
Terminals and Printers: A VT1 00’” compatible terminal or personal computer with 
terminal emulation software can be connected to the system as a maintenance termi- 
nal. Printers are used to create hard-copy records such as traffic reports, maintenance 
information, etc. 
Customer Data Entry (CDE) 
Customer Data Entry is accomplished from the maintenance terminal or from the at- 
tendant console. The console LCD guides the attendant through the data entry proce- 
dure by displaying a series of prompts and listing the required steps to be performed. 
The console display has four lines of 80 characters each. The two top lines display the 
steps to be taken, and the two bottom lines display the prompts which define the 10 
function keys on the attendant console. For additional information, refer to the Cus- 
tomer Data Entry Practice. The maintenance terminal displays a full screen of each 
programming form. 
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							General Description 
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							3 Hardware Overview 
General 
The heart of the system is the Main Control Card II (MCC II), a 16-bit microprocessor 
operating at aclockfrequency of 8 megaHertz. The main controller, through its address, 
data, and control buses, interfaces to memory, Direct Memory Access Controller 
(DMAC), a Digital Signal Processor (DSP), a Message Subsystem, and a DX Matrix. 
In the SX-200 ML system configuration, the MCC II controls the digital bay through the 
Bay Control Card to which it is attached. 
SX-200 ML System Configuration 
The main hardware components of the cabinet include: 
Main Control Card II - performs call processing and maintains overall control through 
communication with the Bay Control Card. Four megabytes of RAM, one megabyte of 
non-volatile RAM (NVRAM), a System ID Module, a DX module, and a Stratum 3 or 
Stratum 4 clock are part of the Main Control Card II. The MCC II provides seven tone 
receivers, conferencing, and DTMF tone generation 
System Software Storage - system software is stored on a two-megabyte PCMCIA 
memory card. When the system is powered up, call processing and maintenance 
software is loaded from PCMCIA memory to the MCC II RAM. 
Customer Data Entry Storage - CDE software is stored in NVRAM, and can also be 
stored on an off-board personal computer. When the system is powered up, CDE 
software is loaded from NVRAM to the MCC II RAM. 
Bay Control Card - interfaces the peripheral cards with the Main Control Card. 
Peripheral Interface Cards - interface trunks and peripheral devices, such as tele- 
phones, SUPERSETtelephones, and datasets into the system. Up to eight Peripheral 
Interface Cards (PICs) can be installed in Slots 1 to 8. The following section provides 
functional descriptions of the Peripheral Interface Cards. 
Bay Power Supply - provides required voltages to peripheral cards, control cards, 
and system peripheral devices. 
Backplane - the Bay Control Card, the Bay Power Supply, and the eight Peripheral 
Interface Cards plug into connectors on the backplane. 
Peripheral Interface Cards 
Digital Peripheral Cards measure 35.8 cm (14.1 inches) long and 15.8 cm (6.2 inches) 
high. High-power cards can only plug into upper card slots; low-power cards can plug 
into upper or lower card slots. 
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							General Description 
Universal Card 
The Universal Card holds up to four modules. Each module is assigned a power rating 
(x). The cumulative ratings of the modules on the Universal Card cannot exceed a 
value of 10. The Universal Card plugs into an upper (high-power) slot. If more than 
seven receivers are required, a Universal Card and one or more Receiver Modules 
must be installed. The modules are as follows: 
l Receiver/Relay Module (four DTMF Receivers and two Relays per Module) (power 
rating = 2) 
l Music On Hold/Pager Module (one music input, one paging output) (power rating 
= 1) 
l E&M Trunk Module (one trunk) (power rating = 3). 
ONS Line Card. There are 12 DTMF/Rotary line circuits per card. The card accepts 
up to three industry-standard DTMF/Rotary telephone sets per line circuit. The ONS 
Line Card interfaces the telephone analog input with the system’s digital crosspoint 
network. It converts the analog telephone signals into the digital format used by the 
system, and converts the digital information back into the analog signals required by 
the telephone sets. This is a low-power card that may be installed in any digital pe- 
ripheral slot. 
Note: 
Each SX-200 ML PABX includes one ML only ONS Line Card, part number 9109-01 O-003-NA. 
Digital Line Card. The Digital Line Card (DLC) interfaces SUPERSET 401+ 
telephones, SUPERSET 470 telephones, SUPERSET 420 telephones, SUPERSET 
430telephones asynchronous DATASETs, synchronous DATASETs, a DMP Unit, the 
SUPERCONSOLE 7000 Attendant Console, and the SUPERSET 7000 Attendant 
Console to the SX-200 ML PABX through its Digital Network Interface Circuits (DNIC); 
the DNIC is a proprietary integrated circuit. The card has 12 circuits, and is a low-power 
card that can plug into any digital peripheral slot. If a SUPERCONSOLE IOOOAttendant 
console is connected to a DLC, that DLC must be installed in a high-power slot. 
Note: Each SX-200ML PABX includes two ML only Digital Line Cards, part number 9109-012-002-NA. 
LS/GS Trunk Card. The LS/GS Trunk Card contains six loop start or ground start 
trunks (jumper-selectable) and six message registration inputs. This is a low-power 
card that may be installed in any digital peripheral slot. 
Direct Inward Dial (DID) Trunk Card. The DID trunk card contains six 1 -way Direct 
Inward Dial circuits. The DID trunk allows incoming trunk calls to dial directly to an 
extension within the PABX without attendant intervention. It plugs into a high-power 
slot. 
Off-Premise (OPS) Line Card. The OPS line card interfaces the PABX to extensions 
which are part of the system, but are located in a different building from the PABX. It 
contains additional protection circuitry to protect the PABX from extraneous high volt- 
ages or induced currents that may appear on the line. Each OPS card has six circuits 
which each connect to an extension. The OPS Line Card plugs into a high-power slot. 
Tl Trunk Card. The Tl Trunk Card provides an interface to one 24-channel (D4 format) 
Tl trunk. It is a high-power card; because of signal cable restrictions it must be posi- 
tioned in slot 6. With a dual Tl adapter, two Tl trunk cards (in slots 5 and 6) are allowed. 
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							4 Software Overview 
General 
The software is divided into two separate sections, one to run the main control pro- 
cessor and one to run the peripheral control processors. 
Upon power-up, call processing and maintenance routines are downloaded to the main 
controller memory. The main controller executes the maintenance routines and logs 
all major occurrences to non-volatile random access memory (NVRAM), Main Control 
Card II 7-segment displays, and the maintenance terminal (if equipped). 
When the system is functional, the software relevant to the peripheral systems is 
downloaded from the main controller memory to the Bay Control Card’s memory. The 
transfer is accomplished via the message subsystem link, using a single 64 kilobit per 
second bi-directional channel. 
Each software section has its own layers to carry out system functions. The layers 
defined below apply to both controllers unless otherwise specified. 
Physical Layer 
The physical layer consists of the operating hardware such as the microprocessor, its 
associated memory, and input/output devices. 
Scheduling Layer 
This layer provides for scheduling of the different events to be handled. 
Communications Layer 
This layer takes care of the message subsystem.software. The messages between 
the processorsare sent in HDLCformatted packets. The formatting, sending, receiving, 
and unpacking of these messages is handled by the message subsystem software. 
Messages are transmitted using a single 64 kb/s channel in each direction. 
Message Subsystem 
The message subsystem is used as a communication link between the main controller 
and the peripheral controllers. Initially the message subsystem is used to download 
software from the main controller memory to the peripheral controllers’ memory using 
one or two channels per peripheral bay. During system operation, a single channel is 
used as a communication link between the Main and Peripheral Processors. Messages 
are sent in HDLC formatted frames, ensuring error-free transmission of data. 
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							General Description 
Device Input/Output Layer 
This layer handles low level details of interfacing to input/output devices such as tele- 
phony devices and RS-232 ports. 
Utilities Layer 
This software layer provides general utilities needed for resource management, error 
handling, and command interpretation. 
Main Control Processor Applications Software 
The main control processor applications software is responsible for controlling all ac- 
tivities in the PABX. It communicates with the peripheral processors via the communi- 
cations software layer for such things as “origination ,  ” “digits received”, etc. It also 
interprets Classes of Service, System Abbreviated Dial, Personal Speed Call, Auto- 
matic Route Selection, etc. The main control processor software controls all call pro- 
cessing, customer data entry, and maintenance management applications. 
Peripheral Control Processor Software 
The peripheral processor handles tasks that are real-time intensive, such as debounc- 
ing switchhooks, collecting rotary dial pulses, tone cadencing, and signaling on trunks. 
The peripheral processor is also responsible for monitoring hardware activity, such as 
cards being added and removed, and reporting all events to the main control processor 
via the message subsystem.The main control processor acts as the manager of the 
tasks performed by the peripheral control processor. 
Database 
The customer data entry database is stored on RAM and backed up onto a non-volatile 
RAM (for up to 68 hours) on the MCC II. Upon system power-up, the database is 
transferred from NVRAM to the MCC II RAM. Customer data entry information can 
also be kept on a remote PC for retrieval in case of major system failures. Other system 
information such as switchhook flash timing, trunk timings, and rotary digit translation 
for different countries, is routed to the peripheral control systems for processing. 
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							5 Maintenance 
General 
This section briefly describes the maintenance diagnostics for the PABX. These diag- 
nostics test the operation of the system hardware. The main control system controls 
and schedules the diagnostics. 
Upon power-up or reset conditions, the diagnostics software (if enabled) has temporary 
control of the entire system. Once the system has been verified and the PABX is 
operational, the diagnostics run as low priority background tasks. 
Modular design and functional packaging of the equipment permits rapid location and 
replacement of defective components. Circuit malfunctions are detected by diagnostic 
routines automatically initiated by the MCC II. Diagnostic routines, detailed in the Gen- 
eral Maintenance Information Practice, and the Troubleshooting Practice, direct ser- 
vice personnel to the defective circuit card or assembly, and identify the required 
field-replaceable unit. Diagnostic routines and maintenance procedures do not inter- 
fere with users unaffected by the malfunction. 
Maintenance Objectives 
The objectives of the maintenance routines are to isolate a fault to a replaceable card 
or module. Maintenance functions can be performed from either the attendant console 
or an RS-232 terminal. 
RS-232 Maintenance Terminal 
The main contrdl system interfaces to an RS-232 VT-100 maintenance terminal and 
to the Attendant Console in order to enable the user to access the diagnostic menu. 
The diagnostic menu will direct the user through the required procedures in order to 
interrogate the status of the diagnostic subsystem. The user can initiate maintenance 
routines with specific parameters via the terminal. Refer to the W-232 Maintenance 
Terminal Practice. Results can be routed to the appropriate device (printer or terminal) 
according to the user’s instructions. 
Diagnostic Log Files 
A file of the major occurrences in the diagnostic system is maintained in NVRAM. This 
file can be directed to the RS-232 maintenance terminal, the attendant console, or a 
printer. 
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							General Description 
Types of Diagnostics 
There are three types of diagnostic routines: 
l power-up 
l background, and 
l directed. 
Power-up diagnostic routines consist of the complete set of diagnostics for the system. 
When enabled, they are executed upon system power-up and may last several min- 
utes. These diagnostics will perform a rigorous checkon the response and performance 
of the hardware and firmware. Any failures will be displayed on the LED display and 
the RS-232 terminal (when requested), and logged in a file on the NVRAM. 
The background diagnostic routines consist of the complete routines which are run 
during system operation. When enabled they are executed as low priority background 
routines during system operation. 
Directed diagnostics are diagnostic routines that are selected by the maintenance 
person and then run on specified circuits or devices. 
Database Installation and Updates 
The database can be installed or updated from a maintenance terminal or PC with 
terminal emulation connected to the SX-200 ML PABX Maintenance connector. Back- 
up copies of the database can be stored on a PC or on one of the PC’s floppy disks. 
There are no storage devices on an SX-200 ML PABX. 
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							Maintenance 
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