Chapter 6: Configuring DSL Parameters

•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.

•Annex-B_ANFPfor operating conditions that include the Annex B standard with Access Network Frequency Plan Pulse Spectral Density (PSD) mask.

•Auto_ANFP for automatically negotiating the Annex A or B standard with Access Network Frequency Plan Pulse Spectral Density (PSD) mask.

Startup Margin

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 6 dB. A lower margin may result in a higher data rate, but it can increase noise on the line. Possible values are -10dBthrough 10dB, or to completely Disable the margin.

Bit Rate Mode

Bit rate mode indicates how the modem synchronizes with the device to which it is attached in either a Fixed or Adaptive mode. The default for the MM702G modem is Fixed mode. The default for the MM701G modem is Adaptive 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 61), 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.

3Click Apply.

MM701G and MM702G User Manual

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