RFC 1490 (rfc1490) - Page 2 of 35

Multiprotocol Interconnect over Frame Relay

RFC 1490             Multiprotocol over Frame Relay            July 1993


1.  Conventions and Acronyms

   The following language conventions are used in the items of
   specification in this document:

      o Must, Shall or Mandatory -- the item is an absolute
        requirement of the specification.

      o Should or Recommended -- the item should generally be
        followed for all but exceptional circumstances.

      o May or Optional -- the item is truly optional and may be
        followed or ignored according to the needs of the
        implementor.

   All drawings in this document are drawn with the left-most bit as the
   high order bit for transmission.  For example, the dawings might be
   labeled as:

              0   1   2   3   4   5   6   7 bits
              +---+---+---+---+---+---+---+

              +---------------------------+
              |    flag (7E hexadecimal)  |
              +---------------------------+
              |       Q.922 Address*      |
              +--                       --+
              |                           |
              +---------------------------+
              :                           :
              :                           :
              +---------------------------+

   Drawings that would be too large to fit onto one page if each octet
   were presented on a single line are drawn with two octets per line.
   These are also drawn with the left-most bit as the high order bit for
   transmission.  There will be a "+" to distinguish between octets as
   in the following example.













Bradley, Brown & Malis