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CCNP Practical Studies: Troubleshooting by Donna L. Harrington

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A Brief History of Frame Relay

Originally Frame Relay was conceived to run over ISDN. The initial proposals went to the Consultative Committee on International Telephone and Telegraph (CCITT) in 1984. As mentioned in the initial chapters, CCITT is now known as ITU-T, for international standards, whereas American National Standards Institute (ANSI) is still known for American standards.

Standards

ITU-T approved what is known as Recommendation I.122, the framework for additional packet mode bearer services back in 1988. This was part of a series of ISDN specifications where Link Access Protocol D Channel (LAPD) carried the signaling information on the D channel. I.122 outlined how LAPD might be used in other applications besides ISDN. ANSI rapidly ...

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