Chapter 6: Configuring the Ports
2Configure the ADSL startup parameters.
‹The Startup Option determines how an ADSL transmission rate is established when the modem is reset. The following table describes the available options.
Startup Option | Description |
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|
Adaptive at Startup | The modems attempt to come up at the downstream and upstream |
(default) | Max Data Rate (kbps) with a margin greater than or equal to the |
| Startup SNR Margin. If the data rates cannot be obtained, the |
| modems attempt lower data rates that are greater than or equal to |
| the downstream and upstream Min Data Rate (kbps) until sync |
| occurs. If the modems do not achieve the rates, they will not sync. |
Fixed | The modems attempt to come up only at the downstream and |
| upstream Max Data Rate (kbps) values with a margin greater than |
| or equal to the Startup SNR Margin. If the data rates cannot be |
| obtained, the modems continue to attempt the data rates. If the |
| modems do not achieve the rates, they will not sync. |
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|
ŒEnter the Startup SNR Margin. The value can be any number between 0 and 15 dB. The default is 4.
Startup SNR (Signal to Noise Ratio) margin is the margin the modem must achieve to come up.
3Configure the SNR margin threshold.
•Enter the Margin Threshold. The value can be any number between 0 and 15 dB. The default is 3.
The margin threshold determines the SNR margin value below which the ADSL MAR LED on the modem front panel turns off.
Megabit Modem 410F and 420F User Manual | 53 |