I'm a Linux newbie. I've been trying to configure the 3Com 812 Router with PPPoE but I haven't been able to do it.

I've found a pdf with some instructions, but I've a problem with it:

I open minicom and change these things as it says:

Serial port setup:

A - Serial device: /dev/ttyS3
E - Bps/Par/Bits: 9600 8N1
F - Hardware Flow Control: Yes
G - Software Flow Control: No

Modem and dialing:

A - Init string: ---
B - Reset string: ---

And then, "3Com-DSL>" should appear, but it doesn't.

What am I doing wrong? How can I make that appear so I can change the configuration and connect to Internet?