359 lines
6.6 KiB
HTML
359 lines
6.6 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>General Information and Hardware Requirements</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
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TITLE="Linux ACP Modem (Mwave) mini-HOWTO"
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HREF="index.html"><LINK
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TITLE="Linux ACP Modem (Mwave) mini-HOWTO"
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HREF="index.html"><LINK
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REL="NEXT"
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TITLE="Compilation, Installation, and Startup"
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HREF="startup.html"></HEAD
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>Linux ACP Modem (Mwave) mini-HOWTO</TH
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>Prev</A
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><DIV
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CLASS="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="GENERALINFO">1. General Information and Hardware Requirements</H1
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="INTRODUCTION">1.1. Introduction</H2
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><P
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>The ACP Modem for Linux is a software based modem.
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Support software for the ACP modem is composed of a
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loadable kernel module and a user level application. Together
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these components support direct connection to public
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switched telephone networks (PSTNs) and support selected
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countries world wide. Refer to <A
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HREF="cntrylist.html"
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>Section 6</A
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> of this document
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for the supported country list.</P
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><P
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>The modem also supports the standard communications port
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interface (ttySx) and is compatible with the Hayes AT Command
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Set.</P
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><P
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>ACP Modem software is continually under development. If you
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encounter bugs or usability issues, please contact us and
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we'll work to correct them. </P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="CREDITS">1.2. Credits</H2
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><P
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>This Linux ACP Modem driver was ported from the Windows NT™
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version of the driver available from IBM. Many thanks to
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Keith Frechette, Charles Ball, and Frank Novak for their
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technical and support efforts in making this project
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possible.</P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="LATESTVERSION">1.3. Where Can I Get the Latest Version of this Driver?</H2
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><P
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>The latest version of this driver is available from <A
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HREF="http://www.ibm.com/linux/ltc/"
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TARGET="_top"
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>http://www.ibm.com/linux/ltc/</A
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></P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="OTHERRESOURCES">1.4. Are There Any Other Resources?</H2
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><P
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>Thomas Hood's <A
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HREF="http://panopticon.csustan.edu/thood/tp600lnx.htm"
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TARGET="_top"
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>Debian GNU/Linux on IBM ThinkPad 600 and 600x</A
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>
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page contains lots of useful information.</P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="COPYRIGHT">1.5. Copyright Notice and Disclaimer</H2
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><P
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>Copyright (c) 2002 IBM Corporation</P
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><P
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>This document may be reproduced or distributed in any form
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without prior permission. Modified versions of this document
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may be freely distributed, provided that they are clearly
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identified as such, and this copyright is included intact.</P
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><P
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>This document is provided "AS IS", with no express or implied
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warranties. Use the information in this document at your own
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risk.</P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="SUPPORTEDSYSTEMS">1.6. Which Systems are Supported</H2
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><P
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>This version of the ACP Modem driver supports the IBM
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Thinkpad™ 600E, 600, and 770 that include on-board ACP modem hardware.</P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="MODEMFEATURES">1.7. Features of the Modem</H2
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><P
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>The ACP Modem provides the following features:</P
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><P
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></P
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><UL
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><LI
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><P
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>Standard asynchronous COM port interface (NS16550A UART
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compatible) operation</P
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></LI
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><LI
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><P
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>Bell-103/212A, CCITT-V.21/V.22,V.22bis protocols with data
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from 300 to 2400 bps</P
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></LI
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><LI
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><P
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>CCITT-V.32 protocols with data rates of 4800, 9600 uncoded,
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and 9600 bps Trellis coded (Optional)</P
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></LI
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><LI
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><P
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>CCITT-V.32bis protocols with data rates of 4800, 9600,
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12000, and 14400 bps (optional)</P
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></LI
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><LI
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><P
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>ITU-T V.34 protocols with data rates from 2400 to 33600 bps.</P
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></LI
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><LI
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><P
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>56K capable modem</P
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></LI
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><LI
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><P
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>Hayes AT Command Set compatibility</P
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></LI
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><LI
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><P
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>DTMF and pulse dialing</P
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></LI
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><LI
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><P
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>Asynchronous error recovery protocol</P
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></LI
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><LI
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><P
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>Error correction via Microcom Network Protocol (MNP) classes
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1-4</P
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></LI
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><LI
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><P
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>Error correction via the V.42 error correction standard</P
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></LI
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><LI
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><P
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>MNP class 5 for up to 2x data compression</P
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></LI
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><LI
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><P
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>V.42bis for up to 4x data compression</P
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></LI
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><LI
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><P
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>"Adaptive Rate Negotiation" which provides for "Fallback /
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Fallforward" as line quality deteriorates or improves</P
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></LI
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></UL
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><P
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>Your modem contains 56K technology. To take advantage of this
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technology, you must first make sure that your Internet Service
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Provider (ISP) supports a 56K modem protocol. Significantly
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higher modem connection speeds, up to 56kbps, require all-digital
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transmission connections from your ISP to the line card in the
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central office from which your phone line is connected. The
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actual connection rate may be limited by the quality of your
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telephone lines. Telephone line quality may vary from location to location.
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Current regulations limit maximum trasfer rates to 53K. While
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your modem contains 56K technology, typical maximum connection
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rates in the receive direction may be significantly less than
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56K. Currently, 56K capability is for the receive direction
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only. The transmit direction uses V.34 technology.
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</P
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></DIV
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