ADC MM701G2, Руководство пользователя

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Appendix A: Command Line Interface Access April 14, 2006
A-20 MM70xG2-UM-03
Complete an Advanced Configuration
Step Action
1 From the G.SHDSL Menu, enter 3 to display the G.SHDSL Advanced Configuration menu ( Figure A-15 ).
Figure A-15. G.SHDSL Advanced Configuration
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 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 (i.e., 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. The default is -10 dB for the modem.