March 2004
Intermediate to advanced
696 pages
16h 32m
English
Content preview from Cisco Frame Relay Solutions GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 12. X.25 over Frame Relay: Using the Annex G Feature
X.25 is a legacy WAN communication protocol established by the International Telecommunication Union-Telecommunication Standardization Sector (ITU-T) in the 1970s. Similar to Frame Relay, X.25 is designed to interconnect user devices and network devices across geographically dispersed areas. X.25 is designed to operate effectively over any transmission medium regardless of the quality of the line. The X.25 protocol has a built-in error recovery mechanism, which allows it to work over poor-quality transmission media.
This chapter discusses the functionalities of Annex G, a feature that allows X.25 protocol to be transported over a Frame Relay network. The Cisco IOS software supports the ...
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