Step Two : Configuring With Dip Switches - US Robotics 000698-13 Getting Started Manual

Step Two : Configuring with DIP Switches

You will probably not need to change the DIP switch settings, but review
this section to be sure.
The DIP (Dual Inline Package) switches are located on the bracket of the
I-modem. See Figure 3-7 to learn how to set the switches.
4-6
DIP switches
Figure 4.3 Location of the DIP Switches.
Courier I-modem Getting Started Guide