User manual US ROBOTICS 005689-03

[. . . ] This manual covers installation and operating instructions for the following U. S. Robotics modems: · Sportster 56K* faxmodem for Macintosh computers Sportster, U. S. Robotics logo are registered trademarks and Connections, x2, and the x2 logo are trademarks of U. S. Macintosh is a registered trademark and Mac is a trademark of Apple Computer, Inc. [. . . ] V. 17 Fax A ITU-T standard for making facsimile connections at 14, 400 bps, 12, 000 bps, 9, 600 bps, and 7, 200 bps. V. 21 A ITU-T standard for modems operating in asynchronous mode at 300 bps, full-duplex, on public switched telephone networks. V. 22 A ITU-T standard for modem communications at 1200 bps, compatible with the Bell 212A standard observed in the U. S. V. 22 bis A ITU-T standard for modem communications at 2400 bps. The standard includes an automatic link negotiation fallback to 1200 bps and compatibility with Bell 212A/V. 22 modems. V. 27 ter A ITU-T standard for facsimile operations that specifies modulation at 4800 bps, with fallback to 2400 bps. V. 29 A ITU-T standard for facsimile operations that specifies modulation at 9600 bps, with fallback to 7200 bps. V. 32 A ITU-T standard for modem communications at 9600 bps and 4800 bps. V. 32 modems fall back to 4800 bps when line quality is impaired. V. 32 bis A ITU-T standard that extends the V. 32 connection range: 4800, 7200, 9600, 12, 000, and 14, 400 bps. V. 32 bis modems fall back to the next lower speed when line quality is impaired, fall back further as necessary, and also fall forward (switch back up) when line conditions improve. V. 34 An ITU-T standard with recommendations that currently allow data rates as high as 33, 600 bps. 33 V. 42 A ITU-T standard for modem communications that defines a two-stage process of detection and negotiation for LAPM error control. V. 42 bis An extension of ITU-T V. 42 that defines a specific data compression scheme for use during V. 42 connections. Xmodem The first of a family of error control software protocols used to transfer files between modems. These protocols are in the public domain and are available from many bulletin board services. XON/XOFF Standard ASCII control characters used to tell an intelligent device to stop/resume transmitting data. 34 Ymodem An error-checking protocol that can send several files of data at a time in 1024-byte (1K) blocks. This protocol can use either checksums or CRC for error checking. Ymodem G Similar to Ymodem, except it includes no error checking, which makes it faster. Zmodem Similar to Xmodem and Ymodem, except it includes batch transfer, the ability to recover from a partially complete transfer, an autostart feature, and improved efficiency. Technical Quick Reference The Quick Reference appendix includes information about: · · · Front Panel Lights Command Summary S-Registers 35 Front Panel Lights Symbol Meaning Status AA . . . . . . . . . . Auto Answer. . . . . . . . . . . . . . . . . . . . . . Answer mode: ON when register S0 is set to 1 or higher (Auto Answer) and when answering a call; OFF when modem originates a call. Light flashes when there is an incoming call. Carrier Detect . . . . . . . . . . . . . . . . . . . . ON if modem receives a valid data signal (carrier) from a remote modem, indicating that data transmission is possible. Always ON if CD override is ON (&C0). Received Data. . . . . . . . . . . . . . . . . . . . Flashes when modem sends result codes or passes received data bits from remote. [. . . ] La compagnie de télécommunications peut demander à l'utilisateur de débrancher un appareil à la suite de réparations ou de modifications effectuées par l'utilisateur, ou à cause de mauvais fonctionnement. Pour sa propre protection, l'utilisateur doit s'assurer que tous les fils de mise à la terre de la source d'énergie électrique, des lignes téléphoniques et des canalisations d'eau métalliques, s'il y en a, sont raccordés ensemble. Cette précaution est particulièrement importante dans les régions rurales. AVERTISSEMENT: L'utilisateur ne doit pas tenter de faire ces raccordements lui-même; il doit avoir recours aux services d'un électricien. [. . . ]