Avaya Configuring Line Services Manual do Utilizador Página 134

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Configuring Line Services
6-10 115391-A Rev. A
Setting the Line Coding Method
By default, the MCT1 interface uses bipolar with 8-zero substitution (B8ZS) line
coding. B8ZS line coding replaces a block of eight consecutive binary 0s with an
8-bit B8ZS code containing bipolar violations in the fourth and seventh bit
positions of the substituted code. In the receive direction, the B8ZS code is
detected and replaced with eight consecutive binary 0s.
You can select AMI line coding method instead. AMI line coding is bipolar: a
binary 0 is transmitted as zero volts and a binary 1 is transmitted as either a
positive or negative pulse, opposite in polarity to the previous pulse. (When
configured for AMI line coding, the MCE1 link module remains synchronized
upon receiving up to 45 consecutive 0s.)
You can set the line coding for this MCE1 interface.
Setting the Signal Level
The Signal Level parameter specifies the T1 transmit power level in decibels (dB).
The DS1 values of -15 and -7.5 dB are long-haul and the carrier determines these
values if 0.0 dB is not sufficient.
The DSX1 values of 0.0, 0.5, 0.8, 1.1, and 1.5 dB are short-haul, and correlate
with cable length as follows:
0.0 dB -- 0 to 133 ft
0.5 dB -- 133 to 255 ft
0.8 dB -- 266 to 399 ft
1.1 dB -- 399 to 533 ft
1.5 dB -- 533 to 655 ft
By default, the signal level is set to 0.0 dB. You can set the signal level for this
MCT1 interface.
Site Manager: Line Coding parameter: page A-49
Site Manager: Signal Level (dB) parameter: page A-50
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