3Com 005605-00 Manual

Contents

GLOSSARY96modemA device that transmits/receives computer datathrough a communications channel such asradio or telephone lines. It also changes signalsreceived from the phone line back to digitalsignals before passing them to the receivingcomputer.nonvolatile memory (NVRAM)User-programmable random access memorywhose data is retained when power is turnedoff. On the U.S. Robotics modem, it includesfour stored phone numbers and the modemsettings.off/on hookModem operations that are the equivalent ofmanually lifting a phone receiver (taking it off-hook) and replacing it (going on-hook).online fall back/fall forwardA feature that allows high-speed, error-controlmodems to monitor line quality and fall back tothe next lower speed in a defined range if linequality diminishes. As line conditions improve,the modems switch up to the next higherspeed.originate modeThe mode used by your modem when initiatingan outgoing call to a destination modem. Thetransmit/receive frequencies are the reverse ofthe called modem, which is in answer mode.