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Seminar - An Overview of Communications Technologies


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Module 7 - LAN, WAN, VPN, WLAN, MAN, FDDI and Optical MANS                                                      Slide 38 of 45 _________________                                                                                  __________

                                                 FDDI Standards

FDDI Standard Description
Media Access Control MAC Controls access to fiber or cable
Token handling
Frames the data, generates the CRC
Recognizes address
Physical Layer PHY Encodes and decodes
Converts serial to parallel
clock recovery
Physical Medium Dependent PMD Specifies cable and connectors
specifies transceivers and optical bypass switch
Station Management SMT Controls all layers of FDDI model
Connection management
Ring monitoring and management
Generates and responds to SMT frames

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ANSI Committee X3T9.5 has developed specifications for FDDI standards.