RS-232 Interface Definition

DocumentID: 655806
Revision Date: 29-Feb-96 8:29:38 PM

The information in this document applies to:
WordPerfect® 5.1 for DOS

Problem

Solutions: RS-232 Interface: Introduced in August of 1969 by the Electronic Industries Assoc., the RS-232 interface standard provides an electrical description for connecting peripheral devices to computers. Although the standard specifies a 25-pin connector, not all RS-232 devices use them. For example, the IBM PC/AT uses a 9-pin connector. The RS-232 standard defines two types of interfaces: data terminal equipment (DTE) and data communication equipment (DCE). Personal computers are almost always configured as DTE devices, while a device like a modem or mouse is typically configured as a DCE device. When connecting two like devices, DTE to DTE or DCE to DCE, you must use a null modem cable or modem-eliminator adapter.

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