US Robotics Courier V.Everything Getting Started Manual page 68

4
On the Terminal Window, type AT <Enter> . Your Courier
V.Everything should respond OK.
Testing With TeleFinder
U.S. Robotics recommends TeleFinder communications program, which is
available free on the U.S. Robotics BBS or the U.S. Robotics web site.
9-4 Courier V.Everything Getting Started Guide