DOCUMENT:Q86960 05-NOV-1999 [pcmail] TITLE :X400: X.400, X.200, and X.25 Acronyms PRODUCT :Microsoft Mail For PC Networks PROD/VER:MS-DOS:3.0 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Mail Gateway to X.400, version 3.0 ------------------------------------------------------------------------------- SUMMARY ======= Here is a list of common X.400, X.200, and X.25 acronyms: Acronym Description ------- ----------- ADMD Administrative management domain AEA Activity end acknowledge APDU Application protocol data unit AS Activity start ASCII American Standard Code for Information Interchange ASN Abstract syntax notation AU Access unit BSC Bisynchronous communications CCITT Consultative Committee for International Telephone and Telegraph CRC Cyclic redundancy check DCE Data communications equipment DL Directory listing DSA Directory system agent DTE Data terminal equipment DUA Directory user agent EIT Encoding information type HDLC High-level data link communications IA5 International Alphabet 5 IPM Interpersonal message ISO International Standards Organization MD Management domain MHS Message handling system MS Message store MTA Message transfer agent O/R Originator/recipient OSI Open Systems Interconnection OSTC Open System Testing Consortium PAD Packet assembler dissembler PDAU Physical data access unit PRMD Private management domain SPDU Session protocol data unit TPDU Transport protocol data unit UA User agent Additional query words: pcmail ====================================================================== Keywords : Technology : kbMailSearch kbMailGateSearch kbZNotKeyword3 kbMailGatex400300 Version : MS-DOS:3.0 ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 1999.