Mitel SX 200 ML PABX Instructions Guide

							2 Features 
General 
2.1 The SX-200 PABX offers many features which are provided by a software package. A 
full description of these features appears in the Features Description Practice. Certain 
limitations which apply to System Features are listed in Table 2-l. 
Table 2-l Feature Limitations 
I Feature Limitations 
Maximum number of simultaneous calls 
48 
Maximum number of speech paths or channels used by any call 
2 
Max. number of simultaneous consultations 
5 
Maximum number of simultaneous add-on (3-way) calls 
Maximum number of simultaneous station-controlled conference calls 
Maximum number of parties in conference at one time 
Maximum number of calls that can simultaneously be camped on to a station, 
trunk group, or hunt group 3 
3 
5 
200 
Maximum number of simultaneous callbacks that can be enabled 
Maximum number of simultaneous call forwards that can be enabled 
Maximum number of simultaneous “Dial 0” calls 
Max. number of messages queued in the system 
Maximum number of hunt groups 
Maximum number of hunt groups in ACD 
Maximum number of calls that can be 
simultaneously connected to Music-on-Hold 
Maximun number of stations in a station hunt group 
Maximum number of stations in a call pickup group 
Maximum number of dial call pickup groups 
Maximum number of trunks assignable to night stations 
Maximum number of trunks in a trunk group 
Maximum number of trunk groups 
Maximum number of calls that can override a given extension 
Maximum number of attendant consoles 
Maximum number of calls that can be simultaneously held by one attendant 200 
400 
48 
250 
100 
99 
48 
50 
50 
50 
200 
50 
50 
1 
11 
8 
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							Engineering Information 
Table 2-l Feature Limitations (continued 
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							3 System Overview 
General 
3.1 SX-200 ML LIGHTWARETM 16 software is available in a base load plus optional fea- 
tures. The password on the System ID module enables optional features. Software is 
not operational without the System ID module. SX-200 ML UG/-/TwA/?E 16 features 
include: 
ANI and DNIS 
Hotel/Motel 
Property Management System 
Automated Attendant 
ONS Voice Mail 
Printing 
Automatic Call Distribution (ACD) 
Key Sets - Off-Hook Voice Announce. 
Maintenance 
3.2 Modular design and functional packaging of the equipment permits rapid location and 
replacement of defective components. Circuit malfunctions are detected by diagnos- 
tic routines automatically initiated by the Main Control Card II (MCC II). Diagnostic 
routines, detailed in the Genera/ A&jntenafxe hforrnatjon Practice, and the Trouble- 
s/?ootjng Practice, direct service personnel to the defective circuit card or assembly, 
and identify the required field-replaceable unit. Diagnostic routines and maintenance 
procedures do not interfere with users unaffected by the malfunction. 
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							4 Technical Description 
General 
4.1 The SX-200 ML PABX uses Pulse Code Modulation (PCM) time-division multiplexing 
as its digital conversion format. The PABX employs both digital peripheral cards 
and 
digitally-interfaced analog peripheral cards. System architecture is illustrated in 
Figure 4-l. The major component blocks are described in the paragraphs below. 
Circuit Switch Links 
4.2 The subsystems of the PABX communicate over 2,048 kHz serial links. Each link is a 
continuously repeated data frame comprising 32 channels; each channel contains an 
8-bit word which occupies an equal time slot within the frame. Certain channels on 
some links are segregated into message channels; the remainder are used for circuit 
switch applications. 
Circuit switch links provide paths through the system for the transfer of peripheral-re- 
lated data; i.e., PCM audio, or TDM data. Each digital peripheral interface card has 
dedicated to it one-and-one-half circuit switch links which connect the card to the 
peripheral switch. 
Control 
4.3 The main processor, which has overall control of the system, is a 32-bit MC68020 
CPU. It is supported by 4.0 megabytes of Dynamic Random Access Memory which is 
used for the storage of system software, programmed devices, abbreviated dial digit 
strings, ARS digit strings, and SUPERSET line appearances. 
e 
The Bay Control Card has 256 kilobytes of RAM and interfaces its bay to the MCC Il. 
It is controlled by the MC68008 microprocessor. 
The SUPERCONSOLE 1 OOOTM Attendant Console interfaces to a Digital Line card by 
Tip and Ring. It contains a HD6303 CPU, supported by 16 kilobytes of EPROM, and 
8 kilobytes of static RAM. A printer can be attached to the console by an RS-232C 
port. The connector is configured so that the console is data communication equipment 
(DCE). 
Digital Switching 
4.4 A custom analog/digital combined integrated circuit is used to implement the 
analog-to-digital and digital-to-analog conversion functions. The basis of this 
encode/decode process is the MT8960 Integrated PCM FilterKodec (commonly 
known as a CODEC), which is used throughout the system to convert analog to PCM 
and PCM to analog. The CODEC combines a low-pass filter and an analog-to-digital 
PCM encoder in the transmit direction (towards the PABX) and a digital-to-analog 
decoder and low pass filter in the receive direction (towards the peripheral). 
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The PABX uses another custom VLSI circuit as its main PCM switching matrix element 
- the 8 link x 32 channel MT8980 Digital Time/Space Crosspoint Switch (DX Chip). 
The DX device is arranged with eight incoming links and eight outgoing links; each link 
comprising 32 channels. Under control of the main CPU, any channel of the incoming 
links can be connected to any channel of the outgoing links. Thus, one DX chip is 
equivalent to a 65,536 (256 x 256) crosspoint array. 
The peripheral control requires three links, and several links are required for the HDLC 
messaging and DSP resources. 
Main Control Card II 
4.5 The Main Control Card II (MCC II) is the highest level in the intelligence hierarchy of 
the PABX. It contains the following components: 
l 68020 CPU 
. Flash Memory module containing system power-up routines 
l Dynamic RAM 
9 Two communication Ports (UARTs) 
. Digital Signal Processor for tone generation/detection and conferencing 
l DX module containing the Circuit Switch Matrix, and the Peripheral Switch Mes- 
sage interface (HDLC). 
Circuit Switch 
The circuit switch matrix provides a nonblocking switching matrix which interconnects 
the digital peripherals (i.e., digital lines and digital trunks). As a nonblocking matrix, 
the circuit switch matrix is fully switchable; i.e., all incoming links have access to all 
outgoing links. 
In the SX-200ML PABX there are three links from the circuit switch matrix to each Bay 
Control Card. 
Table 4-l PCM Circuit Switch Link Assignments 
Link # PCM Link Assignment 
0 Bay I voice link and ringing 
I Bay 1 voice link and messaging 
2 Bay 1 voice link and miscellaneous tone 
3 not assigned 
4 not assigned 
5 not assigned 
6 HDLC message link 
7 Digital Signal Processor link 
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							Technical Description 
Message Subsystem 
4.6 The message subsystem facilitates the transfer of control messages and program 
loading between the main Peripheral Control Processor and lower node processors 
such as Bay Control Cards, SUPERSET telephones, and consoles. This transfer of 
information occurs over the PCM links of the Circuit Switch Matrix. The protocol used 
in the message system is based on the OSI (Open Systems Interconnection) widely 
used HDLC (High Level Data Link Control) protocol format. 
MAIN CONTROL CARD  MAIN CONTROL CARD 
MAIN  MAIN 
CONTROLLER  CONTROLLER 
(68 020)  (68 020) MEMORY  MEMORY DISPLAYS  DISPLAYS 
AND  AND 
ID PROMS  ID PROMS PCMCIA (Jl)  PCMCIA (Jl) 
FLASH  FLASH 
MEMORY  MEMORY 
CARD  CARD 
SYSTEM ID 
I I SIGNAL 1  ADDRESS, DATAAND CONTROL BUS  ADDRESS, DATAAND CONTROL BUS 
REAR PANEL  REAR PANEL 
CONNECTIONS  CONNECTIONS 
r 
1 s,$;;y;D 1 ~p;;~oR~ S$$$M - I b - - - - -, 
. , 
UARTs, 
I ’ 
-:2;;R-;  SFT, RTC r . 
and drivers 
- 
m 
m . m m m 
I II 
DX ARRAY APPLICATION 
SPECIFIC 
INTEGRATED 
CIRCUIT 
A 
TO/FROM 
PERIPHERAL DEVICES 
cc0773 
Figure 4-l 
SX-200 ML - 
L/G/fTWARE 16 ML System Architecture 
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							Engineering information 
Peripheral Interface Cards 
4.7 
Peripheral interface cards provide an interface between the terminations of the PABX 
(lines and trunks) and the circuit switch. The card type depends upon the type of 
peripheral interfaced to the system; i.e., an E&M Trunk card caters to E&M trunks 
only. 
The number of interface circuits that each card provides varies with the type, complex- 
ity, and space requirements of the circuit. A description of the peripheral interface cards 
is provided in the following chapter. 
Operation of the digital peripheral 
card is by the MCC II through the Bay Control Card. 
The clocks provided by the MCC II for the digital peripheral cards are as follows: 
Frame Pulse. This signal synchronizes the start of a PCM frame which consists of 
a complete sequence of 32 channels. It occurs every 125 microseconds (8 kHz). 
244 ns Clock (C244+). The positive going edge of each clock pulse is used to 
generate channel counting. 
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							5 Circuit Card 
Descriptions 
General 
5.1 This chapter describes the cards used in the SX-200 ML PABX. 
Main Control Card II 
Description 
5.2 This section describes the Main Control Card II (MCC II). There are two variants of the 
MCC II, one with a Stratum 4 clock (part number 9109-070-OOO-NA), the other with a 
Stratum 3 clock (part number 9109-070-001 -NA). 
The MCC II and the Switch Matrix perform all call processing for the entire system. 
CAUTION: Do not insert or remove the Main Control Card II (MCC II) with the 
power on. Damage to onboarcl circuits may result. 
Facilities 
Facilities on the Main Control Card II are: 
. 
. 
. 
. 
. 
. 
. 
. 
. 
. 
. HDLC link for high speed message communication and bulk data transfers to 
peripheral processors or Bay Control Cards 
Two UARTs (one printer port, one maintenance port) 
Real Time Clock for time of day and interrupt generation, with 3-hour non-volatile 
backup 
System PCM Clock Generation 
Memory: Dynamic RAM, 3-day non-volatile CMOS RAM 
PCMCIA card carrier (for flash memory card for software loading) 
Hex and LED displays for diagnostics 
System identification for software security 
Digital signal processor to generate and detect progress and ringing tones and to 
provide conferencing 
Switch Matrix (digital time/space crosspoint switch) for circuit and message 
switching 
Fault detection hardware to monitor PCM clock and processor sanity (watchdog). 
Operation 
The correct System ID Module must be installed or the software will not run. 
At power-up the Main Control Card II is held in reset for about I second after the power 
supply voltages reach their normal levels. After reset, the processor first runs the test 
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							Engineering Information 
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software contained in its flash memory. This test software consists of tests for the RAM 
memory, the CPU and the DMA controller. A routine to load the system software into 
RAM from flash memory is run only after all preliminary tests have been passed. 
RAM 
Btief Description 
The RAM carries the dynamic memory required for program storage and call process- 
ing work areas. 
Switch Matrix 
Brief Description 
The Switch Matrix is integrated into the Main Control Card Il. 
Facilities 
The Switch Matrix includes a DX (digital crosspoint) switch. 
Electtical Description 
The DX array is a non-blocking array that provides bi-directional links with balanced 
drivers and receivers. 
Tl Clock 
Brief Description 
The Ti Clock is a digitally controlled oscillator which synchronizes the system clock 
to an incoming Tl frame rate clocksignal and is only required when aT1 card is present 
in the system. There are two MCC II variants: one with a Stratum 3 clock and one with 
a Stratum 4 clock. 
Electrical Desctiption 
Every 100 ms the Tl Trunk Card sends a counter value representing the phase differ- 
ence between the incoming Tl clock and the SX-200 PABX system clock. On the MCC 
II a digital to analog converter generates a corresponding voltage to control the clock 
oscillator. This forms a phase-locked loop which keeps the clocks in phase. 
System ID Module 
Brief Desctiption 
The System ID module plugs into the connector side of the MCC Il. It must be present 
for the PABX to load its software after power-up. 
Operational Desctiption 
At power-up, the PABX verifies the presence of the System ID module before allowing 
software to load. The System ID module and the Mite1 options password enable the 
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