Mitel SX 200 ML PABX Instructions Guide

Circuit Card Descriptions 
Interface Technical Specifications 
MOH Input 
The MOH input is a transformer-coupled input with impedance of 600 ohms. The gain 
is fixed at -4 dB A/D. In order to meet signal power limits applied to such interfaces by 
FCC part 68 and Industry Canada, CS03. The audio level at the digital point will be 
limited to -15 dBm0 and the frequency response is rolled off (3 dB point) at approxi- 
mately 3 Khz. The amplitude limiting begins to affect the input signal when it exceeds...

Engineering Information 
5-24 Issue 1 Revision 0 March 1997  

6 Signaling and 
Supervision 
General 
6.1 This Part outlines the signaling and supervision parameters of the PABX. 
The standard range of tones are available from the PABX’s Digital Signal Processor: 
. 12 DTMF sets of tones, as listed in Table 6-l. 
l A set of call progress tones as listed in Part 9, which form part of the country’s 
Audible Tone Plan. 
l One ringing tone of 20 Hz. 
The PABX is capable of accepting and repeating signals from telephone sets which 
have the parameters shown in Table 6-1,...

Engineering Information 
Table 6-l DTMF Tone Parameters 
High Frequency (Hz) 
Low Frequency (Hz) 1209 1336 1477 
697 I 2 3 
770 
4 5 6 
852 7 8 9 
941 * 
0 # 
I 
Frequency deviation: IL 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) 
Table 6-2 Dial Pulse Reception Limits 
Parameter 
ONS Line: Min Max 
I Pulse Rate 
I t3 PPS 1 12 PPS 1 
Break Duration 1 1 
58% 64%...

7 Transmission 
General 
7.1 
The following descriptions detail some of the transmission characteristics which apply 
to the PABX. 
Frequency Response 
7.2 The frequency response relative to 1004 Hz at 0 dBm for different types of intercon- 
nections is shown in Table 7-l. 
Table 7-l Frequency Response 
Variation in Attenuation with 
respect to 1004 Hz (dB) 
Interconnection Frequency (Hz) minimum maximum 
Line to Line 
60 -20.0 -- 
or 200 0 
-5.0 
Line to 2-W Analog Trunk 
300 0.5 -1 .o 
or 
3000 0.5 -1...

Engineering Information 
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. 
Table 7-2 Overload Levels - Digitally Switched Analog Card Types 
I 7 Overload Point (dB) 
I 
I Interface Type 
I Connecting Circuit 
I IOL 
I OOL 
I 
ONS(A) any circuit 6.0 0 
ACO(A) ONS(D) 0 3.0 
ACO(A) any trunk 3.0 3.0 
Quantization Distortion 
7.4 The quantization distortion of a connection is a measure of the signal to...

Transmission 
Table 7-5 Return Loss Characteristics 
Connection Type 
Line to Line 
Line to 4-W Trunk Terminal Through Transhybrid Non-T 
Balance Balance Loss aiking 
ERL SFRL ERL SFRL 200 - 500 - 
CcW 
Cd@ (W Cd@ (W 3400 2500 
Hz Hz 
18 12 
24 14 
Crosstalk 
7.7 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 
7.8 The round trip echo path delay with a frequency of...

Engineering information 
Table 7-6 Envelope Delay Distortion 
Connection Type 
Frequency Band (Hz) 
Line to Line 1000 - 3000 
Envelope Delay Distortion (microseconds) 
less than 280 
400 - 3200 less than 560 
Line to Trunk 1000 
- 3000 less than 140 
I 400 - 3200 I less than 280 I 
Trunk to Trunk 1000 - 3000 less than 140 
400 - 3200 less than 280 
Longitudinal Balance 
7.10 All connections (except ONS) meet the longitudinal balance requirements outlined in 
Table 7-7. Note that these apply to OFF-HOOK...

Transmission 
Idle Channel Noise - 3 kHz Flat 
7.13 The idle channel noise for 3 kHz flat noise requirements do not exceed the following 
values for any type of interconnection: 
l 95% of all interconnections: 39 dBrn0 
l 50% of all interconnections: 35 dBrn0 
March 1997 Issue 1 Revision 0 7-5  

Engineering Information 
7-6 Issue 1 Revision 0 March 1997