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...

General Description 
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Issue 1 Revision 0 
March 1997  

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...

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)...

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...

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...

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...

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...

Maintenance 
March 1997 
NOTES 
Issue 1 Revision 0 5-3  

General Description 
5-4 
NOTES 
Issue 1 
Revision 0 
March 1997