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April 14, 2006 Appendix A: Command Line Interface Access
MM70xG2-UM-03 A-19
2 Configure the following parameters as directed by your service provider:
• Operating Mode
Type 1 then select 1 for Remote and 2 for Central-Office.
When the modem is connected to a service provider through a DSLAM, the operating mode is
Remote (default setting). When two modems are used in a point-to-point application (LAN
extension, for example), one modem at the customer or user site is set to Remote, and the second
modem in the CO or wiring closet is set to Central-Office. For instruction on setting up G.shdsl
parameters and other related parameters for a point-to-point modem application, go to Chapter 7:
Implementing a Point-To-Point LAN Extension.
• 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 MM701G2 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.
• 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 -10 dB. A lower margin may result in a higher data rate, but it can increase noise on
the line.
• Bit Rate Mode
Type 4 then select either 1 for Adaptive or 2 for Fixed mode. Bit rate mode indicates how the modem
synchronizes with the device to which it is attached. The default for the modem is Adaptive mode.
The following provides more description for each mode.
– Fixed mode indicates that the modem will synchronize with the other end (a DSLAM or another
modem) at a fixed bit rate through negotiation. The modem will synchronize at the best rate, up
to the data rate specified (page 124), that can be achieved by both ends.
– Adaptive mode indicates that prior to modem negotiating a rate, the modem performs an
adaptation phase during which it determines a best possible rate based on conditions of the line.
After adaptive mode, the modem will then negotiate the best rate that can be achieved with the
other end, based on the adaptation results.
3Type 5 to Apply the new configuration for the G.shdsl settings.
Step Action