dsl

[Matt Fair <matt@netasol.com>]

I just got Qwest DSL with a cisco 678.  I am confused, what is the best
way to set this up?  I want to have 3 computers on my lan to share the
connection.  I installed dhcp-client.  The modem also has a serial
connection, but I do not know how to access this, is this just for
configuring the modem?
My networks:

                INTERNET
                          ||
                  Cisco 678
                         ||
                      HUB
                        /|\
                     /   |   \
                   /    |     \
        Apollo    |       Whistler
                    Sphere

What do I need to do to get this configuration set up?  Right now I have
it working with a modem where Apollo has the modem hooked up at ttyS0.
I am using IP masquerading to allow all computers on the network to
share the dial-up connection.  My quest account I believe will give me a
ip address through DHCP.  I am just stuck and don't know what to do.
My dsl line is currently activated, my computer is not.  Any help would
be appreciated.
Thanks in advance,
Matt