Microsoft KB Archive/139636

= X400: Abbreviations for CCITT Recommendation X.224 =

Article ID: 139636

Article Last Modified on 10/30/2006

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APPLIES TO


 * Microsoft Mail Gateway to X.400 3.0
 * Microsoft Mail Gateway to X.400 3.2

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This article was previously published under Q139636



SUMMARY
This article lists some of the acronyms that are seen when you view the X400MMDD.LOG file, where mmdd represents the month (mm) and the day (dd) the log was written when debug (-LD) was enabled.



Data Units
  TPDU           Transport Protocol Data Unit TSDU          Transport Service Data Unit NSDU          Network Service Data Unit

Types of Transport Protocol Data Unit
  CR TPDU        Connection Request TPDU CC TPDU       Connection Confirm TPDU DR TPDU       Disconnect Request TPDU DC TPDU       Disconnect Confirm TPDU DT TPDU       Data TPDU ED TPDU       Expedited Data TPDU AK TPDU       Data Acknowledge TPDU EA TPDU       Expedited Acknowledge TPDU RJ TPDU       Reject TPDU ER TPDU       Error TPDU

TPDU fields
  LI             Length Indicator (field) CDT           Credit (field) TSAP-ID       Transport Service Access Point Identifier (field) DST-REF       Destination Reference (field) SRC-REF       Source Reference (field) EOT           End of TSDU mark TPDU-NR       DT TPDU number (field) ED-TPDU-NR    ED TPDU number (field) YR-TU-NR      Sequence number response (field) YR-EDTU-NR    ED TPDU number response (field)

Time and associated variables
  T1             Local retransmission time N             The maximum number of retransmission's   L              Time bound on reference and sequence numbers I             Inactivity time W             Window time TTR           Time to try reassignment/resynchronization TWR           Time to wait for reassignment/resynchronization TS1           Supervisory timer 1 TS2           Supervisory timer 2 MLR           NSDU lifetime local-to-remote MRL           NSDU lifetime remote-to-local ELR           Expected maximum transit delay local-to-remote ERL           Expected maximum transit delay remote-to-local R             Persistence time AL            Local acknowledge time AR            Remote acknowledge time

Miscellaneous
  TS-user        Transport Service user TSAP          Transport Service Access Point NS-provider   Network Service Provider NSAP          Network Service Access Point QOS           Quality of service The information above was extracted from The International Telegraph and Telephone Consultative Committee (CCITT), Recommendation X.224, Section 4, page 43. Please refer to Recommendation X.224 for a more in-depth definition and description.

For additional information on the X400MMDD.LOG, please see the following article in the Microsoft Knowledge Base:

86988 X400: How MTAs Initiate and Communicate

Additional query words: 3.00 3.20

Keywords: KB139636

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