Mitel Sx 50 Dpabx Instructions Guide

Engineering Information 
(MCC2) as an alternative method of performing Music on Hold. (The E&M Trunk 
module-is described under Trunk Operation). 
9. Digital Switching Matrix Description: describes the pulse-code modulation, ti- 
me-division multiplexing and digital switching array used in the SX-50 system. 
10. Traffic Considerations: provides data used in determining parameters which are 
traffic-dependent such as quantities of trunks required and level of traffic per line. 
180 l-2 Revision 0...

2 . 
SYSTEM CHARACTERISTICS 
System Limitations 
2.1 Table l-1, System Parameters, lists the SX-50 system hardware and software 
operational limits. 
Table 2-l System Parameters 
Parameter Maximum 
Attendant Consoles 1 
Call Forwards 80 
Call Indications per System 30 
Classes of Service 9 
CO Trunks (Loop Start/Ground Start) 80 
Digits per Digit String 40 
DID Trunk Circuits 16 
DTM F Receivers 5 
E&M Trunks 32 
Hunt Groups 6 
Members per Hunt Group . 8 
Members per Pickup Group 160 
Members per Ring...

Engineering Information 
LSlGS TRUNKS 
DID TRUNKS DATA 
E&M/TIE TRUNKS DEMULTIPLEXER 
RS-232-C PORT RECORDER 
OR 
PRINTER  , 1 
OFF-PREMISES 
EXTENSION 
DTMF 
TELEPHONE 
NIGHT BELL 
ROTARY 
TELEPHONE 
SUPERSET 3 
TELEPHONE 
I PAGING SYSTEM 
I 
I 
VX VOICE PROCESSOR 
SUPEFlSET4 
TELEPHONE 
__ 
El ! -& 
..; 
. 
= - ::: 
MODEM  SUPERSET TELEPHONE 
SUPERSET TELEPHONE MAINTENANCE TERMINAL 
(ACCESS RMATS) 
LCD CONSOLE 
Figure 2-l System Block Diagram 
180 2-2 
Revision 0 9104-091-l 80-NA Issue 5  

System Characteristics 
Electrical Characteristics 
1 
2.2 Table 2-2 lists the electrical characteristics of the SX-50 system. 
Table 2-2 Electrical Characteristics 
Parameter 
AC Rejection 
Central Office (LS/GS)Loop Resistance Limit 
Crosstalk 
Dial Tone Detector Level 
Direct Inward Dial (DID)Loop Resistance Limit 
Distance of Consolefrom Equipment Cabinet 
FCC Registration Number Detail 
60 Hz, 180 Hz at 50 Vrms 
1600 ohms maximum 
Better than 75 dB down 
350/440 Hz, minimum -23 dBm 
2240 ohms...

Engineering Information 
Tone Plans - Country Variants 
2.3 MS53 and MS54 support two new tone plans. Table 2-l lists the tone plans for North 
America, Hong Kong and Taiwan. A tone plan variant is selected using CDE 
Command 100, Register 3, field C. Refer to Section 9104-091-210-NA, Customer 
Data Entry, for more information. 
Environmental Conditions 
2.4 
Table 2-4 lists the environmental conditions for the storage and transpqrt of t,he 
SX-50 system. Table 2-5 lists the environmental conditions for...

System Characteristics 
Table 2-3 Tone Plans - County Variants 
(continued) 
Country 
Tones 
4% Dial Tone 
3ial Tone North America 
3501440 Hz, continuous, 
500 ms OFF, -16dBm 
3501440 Hz, continuous, 
-16 dBm 
_ Hong Kong 
3501440 Hz, continuous, 
500 ms OFF, -10 dBm 
350/440 Hz, continuous, 
-10 dBm 
Taiwan 
350/440 Hwontinuous, 
500 ms OFF, -10 dBm 
380 Hz, continuous, -10 
dBm 
I I I 
qeorder Tone 1480/620 Hz, 250 ms ON, 1480/620 
Hz, 250 ms ON, .I 480/620 Hz, 250 ms 
250 ms OFF, -24dBm 250 ms OFF,...

Engineering information 
Table 24 Environmental Conditions (Storage - Transport) 
I Condition 
I Quantity 
Temperature Range: 
40” C to +60” C (-40” F to +140” F) _ 
Relative Humidity: 
Vibration: 5 - 95% relative humidity, noncondensing 
5 G (Sinusoidal) 10 to 500 Hz 
Shock: 1 Up to 75 cm (30 in.) drop depending on package -1 
Low Pressure: I87 mm Hg (50,000 feet) 
I 
Temperature Shock: 
-40” C to +25” C (-40” F to +77” F) in 5 minutes 
I 
Table 2-5 Environmental Conditions (Operating) 
I Condition 
I...

3 . 
POWER REQUIREMENTS 
Power Supply Unit 
3.1 The power supply unit clips to the left side of the Card Frame. It is a self-contained 
unit providing a high level of isolation. The Control Card plugs into the Power Supply. 
The SX-50 system maintains connections of established. calls for all ac power 
interruptions lasting 100 ms or less for up to 80% traffic load conditions, at 115 volts 
nominal supply. 
Input Requirements 
3.2 The SX-50 system is powered from ac commercial power. Table 3-l lists the...

Engineering Information 
180 3-2 Revision 0 9104-091-l 80-NA Issue 5  

4 
’ SIGNALING AND SUPERVISION 
General 
4.1 
This Part details the signaling and supervisory parameters of the SX-50 system. 
Input Signaling Parameters . 
4.2 Dial Pulse. 
The SX-50 system accepts and repeats Dial Pulse (DP) signals from 
telephone sets which have the parameters shown in Table 2-1, Dial Pulse Detection. 
Table 4-l Dial Pulse Detection 
Parameter 
Pulse Rate (pps) 
Break Duration (%) Minimum Maximum 
8.0 12.0 
58 64 
Break Duration (ms) 
I 
53 
80 
I I I 
Interdigit Time (seconds) 0.300...