Index184AAmerica Online, U.S. Robotics online supportand, 122American Standard Code for InformationInterchange. See ASCIIanalog loopback, 127analog phone lines, vs. digital, 15, 24, 35, 39analog signals, 127answer mode, 127AOL. See America Online, U.S. Roboticsonline support andARQ. See Automatic Repeat reQuestASCII (American Standard Code forInformation Interchange), 127asynchronous transmission, 127AT commands, 140-152auto answer, 128auto answer (AA) light, 138auto dial, 138Automatic Repeat reQuest (ARQ) light, 138Bbaud rate, 130BBS, U.S. Robotics, 119-120binary digit, 128bit rate, 128bits per second (bps), 128buffer, 128byte, 128Ccarrier, 129carrier detect (CD) light, 138character, 129characters per second (cps), 129low, errors and, 117
