Transmission parameters
Page 169 of 544
Option 11C and 11C Mini
Technical Reference Guide
Impulse Noise
Impulse noise is defined as noise bursts or spikes that exceed normal peaks of
idle-channel noise. Impulse noise is measured by counting the number of
spikes exceeding a pre-set threshold; it is the number of counts above 55
dBm0 during a five minute interval, under fully loaded busy hour PBX traffic
conditions.
Variation of gain versus level
The variation of gain verses level (tracking error) measures how closely
changes in input levels causes corresponding changes in output levels.
The tracking error is measured in decibels and is defined as the deviation in
gain or loss through a range of input level relative to the gain or loss at the
reference frequency and level of 0 dBmO.
The two methods of measuring the tracking error are listed below.
Method 1
When a noise signal as defined in CCITT, recommendation 0.131 is applied
at the input of any interface, the gain versus level deviation at the output
meets the limits set out in Table 47.
Alternatively, when a sine wave input in the frequency range 700 - 1100 Hz
is applied at the input of any interface, the gain vs level deviation at the output
meets the limits given in Table 48.
Table 46
Impulse Noise
Time
Level
Counts
5 Minutes
>55 dBmO
0
Table 47
Variation of gain versus level method 1
Input Level dBm0
Gain Variation dB
-55 to -10
+/-0.5
Содержание Meridian 1 Option 11C Mini
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Страница 196: ...Page 196 of 544 Spares planning 553 3011 100 Standard 14 00 January 2002 ...
Страница 226: ...Page 226 of 544 System Controller cards 553 3011 100 Standard 14 00 January 2002 ...
Страница 260: ...Page 260 of 544 The TDS DTR card 553 3011 100 Standard 14 00 January 2002 ...
Страница 282: ...Page 282 of 544 M2317 Telephone 553 3011 100 Standard 14 00 January 2002 ...
Страница 308: ...Page 308 of 544 Meridian Modular Telephones 553 3011 100 Standard 14 00 January 2002 ...
Страница 312: ...Page 312 of 544 M3900 telephone series 553 3011 100 Standard 14 00 January 2002 Figure 40 M3901 Figure 41 M3902 ...
Страница 364: ...Page 364 of 544 M2250 Attendant Console 553 3011 100 Standard 14 00 January 2002 ...
Страница 368: ...Page 368 of 544 NT8D02 and NTDK16 Digital Line Cards 553 3011 100 Standard 14 00 January 2002 Figure 55 NTDK16 DLC ...
Страница 388: ...Page 388 of 544 NT8D14 Universal Trunk Card 553 3011 100 Standard 14 00 January 2002 ...
Страница 408: ...Page 408 of 544 NT5K21 XMFC MFE card 553 3011 100 Standard 14 00 January 2002 ...
Страница 414: ...Page 414 of 544 NTAG26 XMFR card 553 3011 100 Standard 14 00 January 2002 ...
Страница 422: ...Page 422 of 544 NT6D71 UILC line card 553 3011 100 Standard 14 00 January 2002 ...
Страница 438: ...Page 438 of 544 NT1R20 Off Premise Station OPS analog line card 553 3011 100 Standard 14 00 January 2002 ...
Страница 492: ...Page 492 of 544 NTAK79 2 0 Mb PRI card 553 3011 100 Standard 14 00 January 2002 ...
Страница 512: ...Page 512 of 544 NTAK20 clock controller 553 3011 100 Standard 14 00 January 2002 ...
Страница 518: ...Page 518 of 544 NTAK93 D channel handler interface 553 3011 100 Standard 14 00 January 2002 ...
Страница 544: ...Page 544 of 544 Index 553 3011 100 Standard 14 00 January 2002 ...
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