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ITU-T X.637 (10/1996)

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Basic connection-oriented common upper layer requirements
This Recommendation provides the profiles of the common upper layer facilities necessary to support basic connection-oriented communications applications. These common elements are specified by reference to the OSI connection-mode Recommendations for the ACSE protocol, the Presentation layer protocol and the Session layer protocol.This is one of a series of Recommendations to support the minimal OSI functions in the upper layers. It is technically aligned with ISO/IEC ISP 11188-1.
Citation: https://handle.itu.int/11.1002/1000/3769
Series title: X series: Data networks, open system communications and security
  X.600-X.699: OSI networking and system aspects
  X.630-X.639: Efficiency
Approval date: 1996-10-05
Identical standard:ISO/IEC ISP11188-1:1995 (Twinned)
Provisional name:X.culr
Approval process:TAP
Status: In force
Maintenance responsibility: ITU-T Study Group 17
Further details: Patent statement(s)