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Here comes some information for everybody interested in
ISO HDLC (the base standard of LAP-B, LAP-M, LAP-D, PPP, ...).
HDLC is a OSI data link layer standard for synchronous and
asynchronous (= start/stop) transmission.
The following list of standards has been copied from
Computer Communication Review, Jan 1991.

ISO DIS 3309          HDLC - Frame Structure
  ISO 3309/Add.1      Addendum 1: Start/Stop Transmission
  ISO 3309/DAM2       Amendment 2: Extended Transparency Options
                                   for Start/Stop Transmission
  ISO 3309/PDAM3      Amendment 3: Seven-bit Transparency Option
                                   for Start/Stop Transmission

ISO DIS 4335          HDLC - Consolidation of Elements of Procedures
  ISO 4335/Add.1      Addendum 1: (no title; contains UI and SREJ
                                  extensions)
  ISO 4335/Add.2      Addendum 2: Enhancement of the XID Function
                                  Utility
  ISO 4335/Add.3      Addendum 3: Start/Stop Transmission
  ISO 4335/DAM4       Amendment 4: Multi-Selective Reject Option

ISO DIS 7809          HDLC - Consolidation of Classes of Procedures
  ISO 7809/Add.1      Addendum 1: (no title; contains UI extensions)
  ISO 7809/Add.2      Addendum 2: Description of Optional Functions
  ISO 7809/Add.3      Addendum 3: Start/Stop Transmission
  ISO 7809/DAM5       Amendment 5: Connectionless Class of Procedures
  ISO 7809/DAM6       Amendment 6: Extended Transparency options
                                   for Start/Stop Transmission
  ISO 7809/DAM7       Amendment 7: Multi-Selective Reject Option
  ISO 7809/DAM9       Amendment 9: Seven-bit Transparency Options
                                   for Start/Stop Transmission

ISO 8885              HDLC - General Purpose XID Frame Information
                      Field Content and Format
  ISO 8885/Add.1      Addendum 1: Additional Operational Parameters
                                  for the Parameter Negotiation Data
                                  Link Layer Subfield and Definition
                                  of a Multilink Parameter Negogiation
                                  Data Link Layer Subfield
  ISO 8885/Add.2      Addendum 2: Start/Stop transmission
  ISO 8885/DAM3       Amendment 3: Definition of a Private Parameter
                                   Negotiation Data Link Layer Subfield
  ISO 8885/DAM4       Amendment 4: Extended Transparency Options
                                   for Start/Stop Transmission
  ISO 8885/DAM5       Amendment 5: Multi-Selective Reject Option
  ISO 8885/PDAM6      Amendment 6: Seven-bit Transparency Option for
                                   Start/Stop Transmission
  ISO 8885/PDAM7      Amendment 7: Frame Check Sequence Negotiation
                                   Using the Parameter Negotiation
                                   Subfield

ISO TR 10171          List of Standard Data Link Layer Protocols
                      that Utilise High-Level Data Link Control (HDLC)
                      Classes of Procedures
  ISO 10171/PDAM1     Ammendment 1: Registration of XID Format
                                    Identifiers and Private Parameter
                                    Set Identifiers
 

--
Markus Kuhn, Computer Science student
University of Erlangen, Germany