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MM701G and MM702G User Manual 57
6
CONFIGURING DSL PARAMETERS
The DSL parameters set up the G.shdsl communication between the modem and a DSLAM or
between two modems used in a point-to-point application. Typically, the DSL parameters for
the modem are preset to immediately synchronize with the service provider (DSLAM
application). However, you may be instructed to make changes to the DSL configuration. This
chapter provides information for setting G.shdsl parameters when the modem is in an
application as a DSLAM endpoint. For instruction on setting up G.shdsl parameters for a
point-to-point modem application, go to Chapter 7, “Implementing a Point-to-Point LAN
Extension.”
BEFORE YOU BEGIN. . .
The following are configurable DSL parameters for the G.shdsl modem; change parameters
only when instructed to do so by the service provider or your system administrator.
❑ The operating mode choices are Remote (use when the modem is an endpoint for a DSLAM
application or the customer-side modem in a point-to-point application) or Central-Office
(use only for the central office-side modem in a point-to-point application)
❑ Annex A or B provides the appropriate operating characteristics for G.shdsl, dependent on
your geographical location.
❑ A margin value, in decibels, that must be met to initialize modem.
❑ Either fixed or adaptive mode that the modem will use to negotiate the best transmission
rate at which both ends of the connection can synchronize.
❑ Wire pair mode, either Single (two-wire) or Dual (four-wire), can be selected only for the
MM702G modem. The MM701G modem is used only in Single mode.
❑ PSD mask is either symmetric or asymmetric. The values used to calculate the asymmetric
mask are dependent on the Annex A or B you selected.