ADC 310F, 320F Configuring the Startup Settings, Read Only Parameters, Select the Startup Option, Select the Startup SNR Margin

Chapter 4: Configuring the Modems

Configuring the Startup Settings

You can configure these settings only from the Megabit Modem 310F for both the Megabit Modem 310F and 320F. The fields are Read Only Parameters when you access them through the management interface for the Megabit Modem 320F.

You configure the Startup Option and Startup SNR Margin to establish how the modem comes up to achieve a transmission rate after a reset (see page 26 for resetting the modem).

Select the Startup Option

1From the ADSL Configuration Menu (page 20), type 1 to select Startup Option.

2Press the SPACEBAR to sequence to the Startup Option you want, then press ENTER .

The startup option determines how an ADSL transmission rate is established when the modem is reset. The default is Adaptive Rate. The following table describes the available options.

Startup Option	Description
Adaptive Rate	The modem comes up at the highest possible data rate based on the
	configured startup margin and line conditions. Adaptive Rate is the default.
Fixed Rate	At startup, the system attempts only the rates you configure in “Configuring
	Data Rates” on page 22, which include maximum upstream and downstream
	data rates with a margin greater than or equal to the configured margin. If the
	data rates cannot be obtained, the system continues to attempt the data rate.
	If it does not achieve the data rate, the modems will not sync.

Select the Startup SNR Margin

1From the ADSL Configuration Menu (page 20), type 6 to select Startup SNR Margin.

2Press the SPACEBAR to sequence to the Startup SNR Margin value you want, then press ENTER .

The Startup SNR Margin is the margin that the modem must achieve to come up. The available values range from 0 to 15 dB. The default is 4 dB.

Megabit Modem 310F and 320F User Manual 21