Nortel 4000 Nota Di Rilascio
23
Remote Access Software Version 5.3 Release Notes
300115-B Rev. A
MC: Mandatory Carrier Frequency - This option, effective only if
Channel Probing is disabled, allows you to manually specify which
carrier frequency (high or low) to use in V.34 modulation. Six baud
rates are specified in V.34 modulation: 2400, 2743, 2800, 3000, 3200,
and 3429. Out of these, the first five can operate at high or low carrier
frequencies. During channel probing, one of these two carrier
frequencies is selected in order to optimize the channel bandwidth
usage.
0: Low
1: High
carrier frequency (high or low) to use in V.34 modulation. Six baud
rates are specified in V.34 modulation: 2400, 2743, 2800, 3000, 3200,
and 3429. Out of these, the first five can operate at high or low carrier
frequencies. During channel probing, one of these two carrier
frequencies is selected in order to optimize the channel bandwidth
usage.
0: Low
1: High
Parameter 30
Default config_bytes Setting:
Decimal base: 3
Octal base: 03
Hexadecimal base: 0x3
Octal base: 03
Hexadecimal base: 0x3
D: Usb1 Early Detector - Detection of unscrambled binary ones supports
V.34 modems under certain South American line conditions.
0: Disable
1: Enable
0: Disable
1: Enable
A/
µ
: Compander Type - Companding (compress/expand) limits the
dynamic range (strongest to weakest signal) encoded into PCM (pulse
code modulation) signals used by the PSTN. The U.S. and Japan utilize
code modulation) signals used by the PSTN. The U.S. and Japan utilize
µ
law (mu law) companding while Europe and most of the rest of the
world require A law.
0: A law
1:
0: A law
1:
µ
law
Bit
15 14 13 12 11 10 9 8 7 6 5
4
3 2
1
0
Value
0
0
0
0
0
0
0 0 0
0
0
0
0
0
1
1
Descr.
Unused
P
RB
T
A/
µ
D