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. 
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							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 Group 9 
Message Waiting Lamps 30 
Members per Trunk Group 80 
Night Bells Equipment 1 
ONS Line Circuits 160 
OPS Line Circuits 80 
Paging Zones 1 
Peripheral Card Slots 10 
Pickup Groups 7 
Ports 160 
Power Fail Transfer Circuits 2 per LS/GS card 
Ring Groups 1 
Simultaneous Callbacks 16 
Simultaneous Calls 45 
Simultaneous Camp-on Calls 20 
Simultaneous Holds (Attendant) 3 
Simultaneous Holds (Station) 44 
Stations in parallel 5 
SUPERSET Telephones 64 
System Speed Call Numbers 900 
Three-party Conferences 6 
Trunk Groups 6 
Trunks Assigned to Night Stations 80 
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							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 
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							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 maximum 
200 m (656 ft) maximum (26 AWG cable) 
BN285B-16887-MF-E 
(U.S. - manufactured systems) 
BN24CK-16185-MF-E 
(U.K. - manufactured systems) 
Heat Dissipation 1095 BTU/hour maximum 
Idle Circuit Noise 20 dBrnC max. lines, 23 dBrnC max. trunks 
Impulse Noise 0 counts above 47 dBrnC for 90% of cases 
Insertion LossStation-to-Station Station-to-Trunk 6 dB 20.5 dB at 1000 Hz 0.0 dB -co.5 dB at 
1000 Hz 
Leak Resistance (minimum) 15,000 ohms 
Longitudinal Balance (Trunks) (See para. 5.5 ) 54 dB minimum, 200 - 3400 Hz 
Primary Power 
96 - 132 Vat, 47 - 63 Hz, 4 A maximum 
Return Loss 12 dB singing, 18 dB echo (See para. 5.4 ) 
Ring Trip During silent or ringing period 
Ringers per Line (maximum) 5 
Ringing Voltage 
75 Vrms 25 V, 20 Hz 
Station Loop Limit - ONS 600 ohms including set at 25 mA 
Station Loop Limit - OPS 
System Impedance 
System Traffic Capacity 2240 ohms including set at 16 mA 
600 ohms nominal for lines 
600 ohms or Complex impedance for trunks 
575 ccs maximum 
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							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 the SXL50 system in 
operation. 
Power Fail Transfer 
2.5 
Each LS/GS Trunk Card has two power fail transfer circuits. If there is a commercial 
power failure or the system shuts down due to overheating or processor malfunction, 
the power fail transfer relays connect the Central Office Trunks to selected stations. 
Incoming Calls. After a power fail transfer has occurred, ringing of stations for 
incoming calls is applied directly to the selected station line from the Central Office. 
Outgoing Calls. After a power fail transfer has occurred, outgoing calls on a station 
made through a ground start CO trunk must be equipped with a ground key or 
Loop-to-Ground Converter (CM1 470). When the ground key is pressed momentarily, 
a ground condition is applied to the ring side of the trunk, energizing the CO equipment. 
One side of the ground key must be connected to a ground and the other to the ring 
conductor of the station. Call origination over loop start trunks does not require the use 
of a ground start key. 
Table 2-3 Tone Plans - County Variants 
I 
Country 
Tones North America Hong Kong Taiwan 
Do Not Disturb Tone 
3501440 Hz, continuous, 3501440 Hz, continuous, 380 Hz, 50d ms ON, 500 
-16 dBm -10 dBm ms OFF, continuous, -10 
dBm 
Busy Tone 480/620 Hz, 500 ms ON, 480/620 Hz, 500 ms ON, 480/620 Hz, $00 ms ON, 
500 ms OFF, -24dBm 500 ms OFF, -10 dBm 500 ms OFF, continuous, 
-10 dBm 
Ringback Tone 440/480 Hz, 1 s ON, 3 s 
OFF, -19dBm 440/480 Hz, 400 ms ON, 440/480 Hz, 400 ms ON, 
200 ms OFF, 400 ms ON, 200 ms OFF, 400 ms ON, 
3 s OFF, continuous, -10 3 s OFF, continuous, -10 
dBm dBm 
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							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, -10 dBm ON,250 ms OFF, continu- 
ous, -10 dBm 
380 Hz, three bursts of 
100 ms ON, 100 ms OFF, 
-10 dBm 
rransfer Dial Tone 350/440 Hz, three bursts 3501440 Hz, three bursts 
of 100 msON, 100 ms of 100 ms ON, 100 ms 
OFF, -16 dBm OFF, -10 dBm 
Tampon Beep 440 Hz, one burst of 200 440 Hz, one burst of 200 440 Hz, one burst of 200 
ms ON, -20 dBm ms ON, -10 dBm ms ON, -10 dBm 
drunk Campon Beep 440 Hz, a single burst of 440 Hz, a single burst of 440 Hz, a single burst of 
100 ms ON,50 ms OFF, 100 ms ON, 50ms OFF, 100 ms ON, 50 msOFF, 
100 ms ON, -20 dBm 100 ms ON, -10 dBm 
100 ms ON, -10 dBm 
Tampon Tone 440 Hz, 500 ms ON, 500 440 Hz, 500 ms ON, 500 440 Hz, 500 ms ON, 500 
ms OFF, continuous,-20 ms OFF, continuous, -10 
ms OFF, continuous, -10 
dBm dBm dBm 
Zall Forward Follow 440 Hz, six bursts of 100 440 Hz, six bursts of 100 440 Hz, six bursts of 100 tie Tone ms ON, 100 ms OFF, -20 ms ON, 100 ms OFF, -10 msON, lOOmsOFF,-lO 
dBm dBm dBm 
Executive Busy 440 Hz, a single burst of 440 Hz, a single burst of 440Hz, a single burst of 
Override Tone 800 ms ON, -20 dBm 800 ms ON, -10 dBm 800 ms ON, -10 dBm 
Ixecutive Busy 440 Hz, 200 ms ON, 6 s 440 Hz, 200 ms ON, 6 s 440 Hz, 200 ms ON, 6 s Override in Progress OFF, continuous, -20 dBm OFF, continuous, -10 dBm OFF, continuous, -10 dBm 
Nakeup Tone 440 Hz, 100 ms ON, 400 440 Hz, 100 ms ON, 400 440 Hz, 1 OOms ON, 400 
ms OFF, continuous,-20 ms OFF, continuous, -10 
ms OFF, continuous, -10 
dBm dBm dBm 
WSExpensive Route 440 Hz, four bursts of 100 440 Hz, four bursts of 100 440 Hz, four bursts of 100 
Warning Tone ms ON, 50 ms OFF, -20 ms ON, 50 ms OFF, -20 ms ON, 50 ms OFF, -10 
dBm dBm dBm 
drunk Conference 440 Hz, 400 ms ON, 30 s 440 Hz, 400 ms ON, 30 s 440 Hz, 400 ms ON, 30 s Warning Tone OFF, continuous, -20 dBm OFF, continuous, -1 OdBm OFF, continuous, -10 dBm 
Page 2 of 2 
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							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 Quantity 
I 
I 
Temperature Range: 
0” C to 40” C (32” F to 104” F) 
I 
1 Relative Humidity: 
110% + 90%, non-condensina I 
Power Fail Transfer Reset. The system returns to normal operation from any of the 
following power fail transfer conditions: 
(a) Reset From High Temperature. If a high temperature condition is detected (nomi- 
nally 65” C (149” F)), the system switches off the power supply and enters the 
Power Fail Transfer Mode. When the temperature returns to normal, the system 
automatically returns to,normal operation. 
(b) Reset From Commercial Power Failure. The system automatically returns to 
normal operation when the commercial power is restored. 
(c) Reset From Processor Malfunction. The system contains a watchdog timer 
which the system software must periodically reset as proof that the processor is 
functioning normally. If the timer is not reset within its time-out period, the system 
goes into Power Fail Transfer mode. 
Note: 
Calls in progress drop when the SX-50 enters or leaves Power Fail Transfer mode. Also, 
upon reset, the time and date will have to be set. 
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							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 input 
supply requirements. 
Table 3-1 Environmental Conditions (Operating) 
Voltage 
Phase 
Frequency Parameter Quantity 
96+132Vac 
Single 
47 - 63 Hz 
Power Supply Outputs 
3.3 The Power Supply provides the following stabilized outputs: 
l 5V 
l -5v 
l 
12v 
l -12v 
l -32 V 
9 -48V 
l 75 Vat (ringing supply). 
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							Engineering Information 
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							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 15 
DTMF Tones. The SX-50 system accepts and repeats DTMF signals from telephone 
sets which have the parameters shown in Table 4-2, DTMF Tone Detection. When any 
If the frequencies shown in this table are present at the system input, any other single 
‘requency (200 to 3400 Hz) must be a minimum of 40 dB lower in level. The SX-50 
system cati detect DTMF tones in the presence of precise dial tone at a level of -16 
1Bm (on a line circuit). DTMF signals must be at least 40 ms in duration. 
Table 4-2 DTMF Tone Detection 
Low Tones 1209 High Tones . . 
1366 1477 
1633 
I 697 
I 1 t 2 13 1 A 
770 4 5 6 B 
852 7 8 9 C 
941 * 0 # 
D 
Frequency Deviation: -cl .5% maximum 
Minimum Level Per Frequency: -17 dBm on line circuit 
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