Step 1: Connecting your modem to the serial port
To configure your DSL modem you first have to connect it to the serial port on your computer. The Cisco 678 comes with a Management cable, this cable is used to set up your modem.  You can get instructions on how to do this from your US West DSL manual starting on page 14, or follow the diagram below. On a Macintosh, an adapter cable is required. If the connection doesn't work using the Mac serial port, try the parallel port.

Step 2: Setting up HyperTerminal
Once your Cisco 678 modem is connected to the serial port, you'll need to configure it using Hyper Terminal. To do this click on the  button go to Programs then Accessories and Hyper Terminal. Once HyperTerminal is active, you'll get a window that looks something like this.

Double click on Hypertrm.exe, and follow the steps to configure your connection.

  • For the Name of the connection type TEST.
  • Don't put anything in the Phone Number. In the Connect Using field select Direct to com1, or which ever com port your serial cable is plugged into (Most likely com1 or com2).
  • Click OK.

This will bring up connection properties window. The settings should read like the following;

  • Bits per second set to 38400
  • Data bits set to 8
  • Parity set to None
  • Stop bits set to 1
  • Flow control set to None
  • Click OK

Step 3: Using Hyper Terminal to configure your Cisco 678
You should now see a blank Hyper Terminal screen, where you will type a series of commands to configure your modem. 
  • Bold text = Commands you type
  • (Red) = Additional instructions
  • Regular text = Modem's response

Hit enter until you see the following cbos prompt. Then type the following commands.

Password: (Enter)

cbos> enable (Enter)
Password: (Enter)

cbos# set nvram erase (Enter)
Erasing Running Configuration.
You must use "write" for changes to be permanent.

cbos# write (Enter)
NVRAM written.

cbos# reboot (Enter)
Hello!
Expanding
CBOS image... CBOS v2.x.x

   Password: (Enter) (will bring up cbos# unless they have set an
enable password)
cbos# set bridging rfc1483 enable (Enter)
cbos# set bridging management enable (Enter) (this is not required but it allows web management)
cbos# set int wan0-0 disable (Enter)
cbos# set int wan0-0 vpi 0 vci 32 (Enter)
                        (vpi - 1 for cap and 0 for DMT)
                        (vci - 1 for cap and 32 for DMT or 35 for AOL)
cbos# set int wan0-0 enable (Enter)
cbos# write (Enter)
cbos# reboot (Enter)

Your modem is now configured correctly, close HyperTerminal and try it out.

Step 4: Configuring your computer(s)
Once your modem is configured you are ready to setup your computer. Your computers will get their IP address automatically (dynamically) unless there is a specific requirement for a static IP address. If you have requested and been assigned a block of static IP addresses, you may use any IP address in the block except that which is already in use by the DSL modem.

Setting up your PC

On Windows95/98, Click , then Settings, and Control Panel. Now double click on Network. On the Configuration tab, double click the entry for the TCP/IP protocol on the LAN card adapter, e.g. TCP/IP -> Intel Ether Express. You will see a box like the one below.

All you have to do under the IP address tab is select Obtain IP address automatically.

Next click on the DNS Configuration tab. Click Disable DNS, and press Ok twice.  You will then be asked to restart your computer.  Do that and you are done.