Describes the HDLC unbalanced classes of procedures, the HDLC balanced class of procedures, and the HDLC connectionless classes of procedures for synchronous or start/stop data transmission. The procedures use the HDLC frame structure defined in ISO/IEC 3309 and the HDLC elements of procedures described in ISO/IEC 4335.

General information

  • Status :  Withdrawn
    Publication date : 1993-12
  • Edition : 3
    Number of pages : 22
  • :
    ISO/IEC JTC 1/SC 6
    Telecommunications and information exchange between systems
  • 35.100.20
    Data link layer

Got a question?

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)

Keep up to date with ISO

Sign up to our newsletter for the latest news, views and product information.