62 lines
4.0 KiB
HTML
62 lines
4.0 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Switched-56" />
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<meta name="abstract" content="When you do not need a full-time connection, you can save money by using switched digital service, which is generally called Switch-56 (SW56)." />
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<meta name="description" content="When you do not need a full-time connection, you can save money by using switched digital service, which is generally called Switch-56 (SW56)." />
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<meta name="DC.Relation" scheme="URI" content="rzaiyconnalts.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzaiydigital.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzaiyisdn4.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rzaiysw56" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Switched-56</title>
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</head>
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<body id="rzaiysw56"><a name="rzaiysw56"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Switched-56</h1>
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<div><p>When you do not need a full-time connection, you can save money
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by using switched digital service, which is generally called <dfn class="term">Switch-56
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(SW56)</dfn>.</p>
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<div class="section"><p>An SW56 link is similar to Digital Data Services (DDS) setup in
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that the data terminal equipment (DTE) connects to the digital service by
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way of CSU/DSU. An SW56 CSU/DSU, however, includes a dialing pad from which
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you enter the telephone number of the remote host. SW56 lets you make dial-up
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digital connections to any other SW56 subscriber anywhere in the country or
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across international borders. An SW56 call is carried over the long distance
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digital network just like a digitized voice call. SW56 uses the same telephone
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numbers as the local telephone system, and usage charges are
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the same as those for business voice calls. SW56 is only in North American
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networks, and it is limited to single channels that can only carry data. SW56
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is an alternative for locations where ISDN is unavailable. Typically, you
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can connect to a SW56 CSU/DSU over V.35 or RS 449 serial interface with synchronous
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protocol at rates up to 56Kbps. With a V.25bis call/answer unit, data and
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call control flow over a single serial interface.</p>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaiyconnalts.htm" title="PPP can transmit datagrams over serial point-to-point links.">Connection alternatives</a></div>
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</div>
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<div class="relref"><strong>Related reference</strong><br />
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<div><a href="rzaiydigital.htm" title="You can use digital service and Digital Data Services (DDS) with PPP.">Digital services and DDS</a></div>
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<div><a href="rzaiyisdn4.htm" title="Integrated Services Digital Network (ISDN) provides switched end-to-end digital connectivity. Unlike other services, however, ISDN can carry both voice and data over the same connection.">Integrated Services Digital Network</a></div>
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</div>
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</div>
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</body>
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</html>
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