Mitel SX 200 DIGITAL Pabx General Descriptions Manual

4. SYSTEM REQUIREMENTS4.1 The environmental and electrical requirements for the SX-200 Digitat
PABX are shown in Table 4-1 and Table 4-2 respectively.Table 4-l Environmental Requirements
Height Per Cabinet96.0 cm
Width Per Cabinet60.0 cm
Depth Per Cabinet70.0 cm
Weight Fully Loaded230 kg
Operating Temperature
loto40~CStorage Temperature-20 to 
500 c
Relative Humidity (Operating)20 to 80%
(non-condensing)
Relative Humidity (Storage)lotogo%(non-condensing)
38.0 inches
23.5 inches
27.5 inches
500 pounds
50...

General Description
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100 4-29109-094-lOO-NA Issue 3 Revision 1 

5. HARDWARE OVERVIEWGENERAL
5.1 The heart of the system is the Main Controller, a 16-bit microprocessor
operating at a clock frequency of 8 
megaHertz. The Main Controller, through
its address, data, and control buses, interfaces to a floppy disk unit, memory,
Direct Memory Access Controller (DMAC), a Digital Signal Processor (DSP), a
Message Subsystem, and a DX Matrix or Switch Matrix Card.
In the 
336-, 456-, and 480-Port configurations, the MCC controls digital Bays
1 and 2 directly.
’In the 336-pot-t...

General Descriptiondownloaded from the disk to the Main Controller Memory using Direct
Memory Access (DMA).
BAY CONTROL CARD
5.5 The Bay Control Card (BCC) interfaces the peripheral cards of digital bays
to the MCC (one BCC for each Bay, except Bays 1 and 2 of a 
144-port Control
backplane).
II
PERIPHERAL CONTROL CARD
5.6 The Peripheral Control Card (PCC) controls all basic functions of the ana-
log Peripheral Cards. The Peripheral Control Card also handles real time tasks,
such as rotary digit...

Hardware Overview
Each module is assigned a power rating. The cumulative ratings of the mod-
ules on the Universal card cannot exceed a value of 10. The ratings of the
modules are 
as follows:
o Receiver/Relay Module: 2
lMusic On Hold/Pager Module: 1l Console Module: 
5l E&M Trunk Module: 3
For example, a Universal Card could be configured with two Console Modules(5 + 5 =
lo), or one Console Module, two Receiver/Relay Modules, and oneMusic On Hold/Pager Module (5 + 2 + 2 + 1 
= 10).
ONS Line Card. There...

General Description
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 itmust be positioned in slot 6 (slot 4 of COMBO Bay 2). 
Tl trunks are not avail-
able with Generic 1002.
5.10 The analog Peripheral cards, each measuring 32.5 cm (13 inches) long
and 25.0 cm (10.0 inches) high, consist of the following:
&station Line Card. This card connects to up to eight DTMF/Rotary telephone
sets.
CO Trunk...

6. SOFTWARE OVERVIEW6.1 The SX-200 Digital PABX software is divided into two separate sections,
one to run the Main Control processor and one to run the Peripheral Control
processors.
Upon power-up, Call Processing and Maintenance routines are downloaded
.
from the disk to the Main Controller Memory using Direct Memory Access
(DMA). The Main Controller executes the Maintenance routines and logs all
’
major occurrences to the disk, non-volatile random access memory, Main
Control Card 
7-segment displays,...

General Description
During system operation, a single channel is used as a communication link
between the Main and Peripheral Processors. Messages are sent in HDLC for-
matted frames, ensuring error-free transmission of data.
DEVICE INPUT/OUTPUT LAYER
6.7 This layer handles low level details of interfacing to input/output devices
such as telephony devices and RS-232 ports.
UTILITIES LAYER
6.8 This software layer provides general utilities needed for resource man-
agement, error handling, and command...

7. MAINTENANCEGENERAL
7.1 This Part briefly describes the maintenance diagnostics for the SX-200
Digital PABX. These diagnostics test the operation of the system hardware.
The Main Control system has the responsibility of controlling and scheduling
the diagnostics.7.2 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....

General Description100 
7-2
may last several minutes. These diagnostics will perform a rigorous check on
the response and performance of the hardware and firmware. Any failures
will be logged to the LED display, the disk, the non-volatile RAM, and theRS-232 terminal.
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...