Filter
Top Products
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 Chapter 7, “Implementing a
Point-to-Point LAN Extension”).
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.