ADC MM701G User Manual
Page 130
Manage DSL
122
MM701G and MM702G User Manual
Standard Annex
Type
2
then select one of the following Annexes:
•
1
—
Annex-A
for operating conditions typically found in the North American
implementation of G.shdsl
•
2
—
Annex-B
for operating conditions typically found in the European
implementation of G.shdsl. This is the default mode for the MM701G modem.
•
3
—
Auto
for automatically negotiating the Annex A or B standard by which this
modem, and the device to which this modem is attached, can operate. This is the
default mode for the MM702G modem.
•
4
—
Annex-B_ANFP
for operating conditions that include the Annex B standard with
Access Network Frequency Plan Pulse Spectral Density (PSD) mask.
•
5
—
Auto_ANFP
for automatically negotiating the Annex A or B standard with
Access Network Frequency Plan Pulse Spectral Density (PSD) mask.
Startup Margin
Type
3
then select a number from
1
to
21
for possible values between
-10dB
through
10dB
, or select
22
to completely
Disable
the margin.The target signal-to-noise margin,
in decibels, that the modem must achieve with a BER of 10
-7
or better to successfully
complete synchronization. The default margin value is 6 dB. A lower margin may
result in a higher data rate, but it can increase noise on the line.
Data Rate (kbps)
Type
4
then select a data rate (number
1
through
34
) which determines the maximum
transmission rate, in kilobits per second, up to which the modem can negotiate and
synchronize with another device (modem or a DSLAM) to which it is attached. When
the
Bit Rate Mode
(page 123) is set to
Fixed,
the range of values are (ADC modems
comply with the standard G.shdsl data rate range):
•
for the MM702G modem, 384 kbps to 4608 kbps, in 128 kbps increments (default
value is 4608)
•
for the MM701G modem, 192 kbps to 2304 kbps, in 64 kbps increments
Rates down to 64 kbps are supported only when operating in single-pair,
point-to-point mode with another ADC modem. (see
When the
Bit Rate Mode
(page 123) is set to
Adaptive
for an MM701G (
Adaptive
is
MM701G default value) or for an MM702G set to
Single
Wire Pair Mode
only (see
below)
,
this field is automatically set to
Adaptive
. An MM702G in
Dual Wire Pair Mode
cannot be used in
Adaptive Bit Rate Mode
.