ADC MM702G2, MM701G2 user manual Noise on the line. The default is -10 dB for the modem

Appendix A: Command Line Interface Access		April 14, 2006
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 10-7or 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.

A-20 MM70xG2-UM-03