Mitel SX-200 DIGITAL Pabx Engineering Information Manual

							Engineering Information 
9. ELECTRICAL CHARACTERISTICS 
General 
9.01 This Part gives details of the electrical characteristics of the 
power supplies. A summary of the electrical power characteris- 
tics is detailed in Table 9-1. 
TABLE 9-l 
ELECTRICAL POWER CHARACTERISTICS 
Characteristic Details 
Door-Mounted AC 
Power Supplv 
Input voltage 120 Vat -20% to +lO% 
Frequency 44 Hz to 64 Hz 
Holdover Time Momentary interruptions in commercia 
power 
Input Current 
Talk Battery Noise 
Shelf-Mounted AC 
Power Supply 
Input Voltage 
Frequency 
Holdover Time 
Input Current - up to 250 ms duration 
4.0 Amps maximum at 120 Vat 
Does not exceed 28 dBrnC 
102 Vat to 135 Vat. 
49 Hz to 63 Hz 
Minimum of: 40 ms at 120 Vat, 20 ms 
at 102 Vat, delivering full rated load 
Maximum of: 2.0 Amps at 120 Vat 
1 .l Amps at 240 Vat 
TABLE 9-2 
BAY POWER SUPPLY TEST POINT VOLTAGES 
Voltage 
+5 Vdc 
+I2 Vdc 
-12 Vdc 
-5 Vdc 
-28 Vdc 
-48 Vdc 
90 Vat Range 
+4.925 to +5.075 
+‘00.8 to +13.2 
-13.2 to -10.8 
-5.5 to -4.5 
-30.8 to -23.8 
-53.76 to -40.8 
63.0 to 99.0 
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							Engineering information 
TABLE 9-3 
REAR DOOR POWER SUPPLY TEST POINT VOLTAGES 
Voltage Range 
+a vdc 
0 Vdc 
-5 Vdc 
-10 Vdc 
-48 Vdc 
GND or 0 Vdc 
90 vat +7.6 to +a.4 
-5.3 to -4.7 
-10.5 to -9.5 
-52.0 to -45.0 
85.0 to 95.0 
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							Engineering Information 
10. SIGNALING AND SUPERVISION 
General 
10.01 
10.02 
(a) 
lb) 
(cl 
10.03 This ‘Part outlines the signaling and supervision parameters of 
the SX-200@ DIGITAL PABX. 
The standard range of tones are available from the SX-200@ 
DIGITAL PABX’s Digital Signal Processor: 
12 DTMF sets of tones. Those in common use are listed in 
Table 30-l. 
A set of tones, listed in Table 12-4, which form part of the 
North American Audible Tone Plan. 
One ringing tone of 20 Hz. 
The SX-200’ DIGITAL PABX is capable of accepting and repeat- 
ing signals from telephone sets which have the parameters 
shown in Table 10-1, Dial Pulse Reception Limits and Table 10-2, DTMF 
Tone Parameters. 
10.04 Where any of the frequencies shown in Table 92-4 are present 
at the system input, any other single frequency (200 - 3400 Hz) 
should be a minimum of 40 dB below the signal frequency. DTMF 
pulses are registered in the presence of precise cfial tone at a level of 
-10 dBm. 
10.05 The SX-200@ DIGITAL PABX gives the following output signal 
conditions: 
0 
Dial Pulse Conditions: 
Pulse Rate 
: 9 to 11 pps 
Break Interval : 58% to 62% 
Interdigit Time : 800 ms. 
e 
DTMF Dialing Conditions: 
Frequency Deviation : f ‘l% 
Tone Duration : greater than 40 ms 
Interdigit Time : greater than 40 ms 
level, low group : greater than -10 dBm 
level, high group : greater than - 8 dBm 
level, DTMF signal : less than +2 dBm 
level, third : greater than 40 dB 
Frequency : below DTMF signal 
Twist : less than 4 dB. 
Note: For information on DTMF levels, refer to Part 12F of this 
Section. 
Page 104  
						

							Engineering Information 
TABLE 10-l 
DIAL PULSE RECEPTION LIMITS 
Parameter 
ONS Line: 
Pulse Rate 
Break Duration 
Interdigit Time 
8 Station Line: 
Pulse Rate 
Break Duration 
Interdigit Time 
OPS Line: 
Pulse Rate 
Break Duration 
Interdigit Time Min 
8 pps 
58% 
300 ms 
8 PP~ 
50% 
300 ms 
8 PPS 
42% 
300 ms Max 
12 PPS 
64% 
15 s 
12 PPS 
80% 
15 s 
12 PPS 
84% 
1% s 
TABLE 10-2 
DTMF TONE PARAMETERS 
Frequency deviation : +1.5 % 
Signal interval (2 frequency) : 40 ms (min) 
Per frequency, minimum level : -17 dBm on line circuit 
Twist, maximum (at -10 dBm): +4 to -8 dB 
(high frequency relative to low frequency) 
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							Engineering information 
11. TRANSMISSION 
General 
11.01 The following descriptions d.etail some of the transmission 
characteristics which apply to the SX-200@ DIGITAL PABX. The 
terms used for the different types of peripheral interfaces are ex- 
plained in Table 1 l-l. 
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							. 
Engineering Information 
TABLE 11-1 
INTERFACE REFERENCES 
Circuit Card Type 
Ref Description (Part No.) 
INS An industry-standard telephone set may be connected to 
the SX-200@ DIGITAL PABX by means of one of the 
following card types: 
ONS(D) * ONS Line card 9109-010 
ONS(A) * 8 Station Line card 9110-011 
3PSS An industry-standard telephone set located off premises 
may be connected to the SX-200@ DIGITAL PABX via this 
card type: 
* OPS Line card 9109-020 
3PSL An industry-standard telephone set located outside the 
range of the ONS circuit Lover 2 kilometers) may be 
connected to the SX-200 DIGITAL PABX via this card 
type: 
* OPS Line card 9109-020 
4CO An Analog CO (ACO) trunk can be connected to the 
SX-200m DIGITAL PABX by means of one of the 
following types of trunk interface cards: 
ACO(D) * LWGS Trunk card 9109-011 
ACO(A) * CO Trunk card 911p211 
ACO(A) * DID/Tie Trunk 
card 9110-031 
ACO(D) * DID Trunk card 9109-031 
AT0 An Analog Toll Office (ATO) trunk may be connected to 
the SX-200@ DIGITAL PABX by means of one of the 
following trunk interface cards: 
E:;:; * LWGS Trunk card 9109-011 
* CO Trunk card 9’110-211 
ATO * E&M Trunk card 9110-013 
ATO * E&M Trunk module 9109-013 
An Analog Tie Trunk (ATT) can be connected between 
the SX-200’ DIGITAL PABX and another PBX, over a 2- 
or 4-wire analog trunk by means of one of the following 
* E&M Trunk card 
* E&M Trunk module 
* DID/Tie Trunk card 
* DID Trunk card 
This designation refers to a “satellite” tie trunk which 9% 10-013 
9109-013 
91 IO-031 
9109-031 
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							Engineering Information 
Frequency Response 
11.02 The frequency response relative to 1004 Hz at 0 dBm for dif- 
ferent types of interconnections is shown in Table 11-2. 
Overload - Digitally Switched Analog Card Types 
11.03 The overload levels shown in Table 11-3 define the maximum 
signal levels which may be applied to an analog interface be- 
fore clipping occurs. The Input Overload (IOL) defines the maximum 
analog input signal level which can be applied to a digital interface 
circuit before clipping of the encoded PCM word occurs. The Output 
Overload (OOL) defines the maximum analog output signal which can 
be produced at the output of an interface by the application of a 3 
dBm0 digital signal to the input. 
Overload - Locally Switched Analog Card Types 
11.04 The change in attenuation when the level of a 1004 Hz signai- k 
increased from -9 to +7 dBm shall not exceed 0.4 dB. 
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							Engineering Information 
TABLE 11-2 
FREQUENCY RESPONSE 
Interconnection Frequency (Hz) Variation in Attenuation 
w/r to 1004 Hz (dB) 
minimum maximum 
Line to Line 60 
200 
Line to 2-W Analog Trunk 300 
3000 
2-W Analog Trunk to 2-W 3200 
Analog Trunk 3400 
Line to 4-W Analog Trunk 
2-W Analog Trunk to 
4-W Analog Trunk 60 
200 
300 
3000 
3200 
3400 -20.0 -- 
0 -4.0 
0.4 -0.65 
0.4 -0.65 
0.4 -1.5 
0 -3.0 
4-W Analog Trunk to 
4-W Analog Trunk 60 
200 
300 
3000 
3200 
3400 -16.0 -9 
0 
-3.0 
0.3 -0.3 
0.3 . -0.3 
0.3 -1.5 
0 -3.0 
:.:, 
_., TABLE 11-3 
OVERLOAD LEVELS - DIGITALLY SWITCHED ANALOG CARD TYPES 
Interface Type Connecting Overload Point (dB) 
Circuit IOL 
OOL 
ONS(A) any circuit 6.0 0 
ACO(A) tiNS(D) 0 
6.0 
ACO(A) any trunk 3.0 3.0 
Quantization Distortion 
11.05 The quantization distortion of a connection is a measure of the 
signal to distortion ratio as the input signal is varied. Note that 
this parameter does not apply to the analog card types. For 95% of 
connections the signal to distortion ratio will exceed the limits shown 
in Table 1 l-4. 
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							Engineering information 
TABLE 11-4 a 
SIGNAL TO DISTORTION RATIO 
1004 Hz input 
Level 
(dBm0) Signal/Distortion Ratio (dB) 
95% of all connections 
33 
27 
22 
Intermodulation Distortion 
Il.05 Intermodulation (harmonic) distortion is measured using two 
pairs of equal level tones (851/863 Hz and 1372/1388 Hz), at a 
total composite input power of -13.0 dBm0. Table 11-5 shows the 
second and third order products for the different types of connections. 
95% of the connections in each category shall exceed the stated limits. 
TABLE 1 l-5 
INTERMODULATION REQUIREMENTS (4.8 Kb/s) 
Connection Second Order Product Third Order Product 
Type (dB) (dB) 
Line to Line 40 43 
Line to Trunk 45 53 
Trunk to Trunk 45 53 
Return Loss 
41.07 The ERL and SFRL return losses for different types of inter- 
connection or idle states are shown in Table 11-6. 
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							Engineering Information 
TABLE 11-6 
RETURN LOSS CHARACTERISTICS 
Connection 
Tvw 
Line to Line 
Line to 4-W Trunk 
4-W Trunk to Line 
Line to 2-W Trunk 
2-W Trunk to Line 
4-W Trtink to 2-W 
Trunk 
2-W Trunk to 4-W 
Trunk 
4-W Trunk to 4-W 
Trunk 
ONS(D) Line 
2-W Trunk 
Loop Start LS/GS 
Trunk (2-W) 
Ground Start LS/GS 
Trunk (2-W) 
Line to Line * 
Trunk to Trunk * 
Line to Trunk * Terminal Balance 
ERL SFRL 
ids) (dB) 
18 12 
24 14 
24 Ii 
18 12 
18 12 
28 14 
28 14 
20 14 
24 14 Through Balance 
ERL SFRL 
(dB) (dB) 
29 20 
27 20 Transhybrid Loss Non-Talking 
SRL 
200 - 500 - ids) 
3400 Hz 2500 Hz 
19 19 
18 21 
6 
2‘ 
10 
5 
* denotes analog card type 
Crosstalk 
11.98 The crosstalk attenuation, or coupling loss, between any two 
transmission paths, at any frequency between 200 and 3200 Hz 
is greater than 75 dB for 95% of all connections. 
Echo Path Delay 
14.09 The round trip echo path delay with a frequency of 1500 Hz 
does not exceed the stated values for the following types of 
interconnection: 
0 
Line to Line: 3.0 ms 
l Line to Trunk: 3.0 ms 
0 
Trunk to Trunk: 3.0 ms. 
Envelope Delay Distortion 
II.10 Table 11-7 details the maximum envelope delay distortion for 
the digital card types. These objectives are met by 95% of all 
connections. For the analog card types, the envelope delay distortion 
is jess than 200 microseconds between 400 and 3200 Hz, for ali 
connections. 
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