i
Foreword.................................................................................................iii
1 Scope ..............................................................................................1
2 Normative references .......................................................................2
3 Definitions........................................................................................3
4 Conventions and abbreviations.........................................................5
4.1 Conventions............................................................................5
4.2 Abbreviations..........................................................................6
5 General description ..........................................................................7
5.1 Ring overview .........................................................................7
5.2 Environment ...........................................................................9
6 Services .........................................................................................11
6.1 TP-PMD-to-PHY services......................................................11
6.2 TP-PMD-to-SMT services......................................................14
7 Media independent operations ........................................................16
7.1 Transmit function ..................................................................17
7.2 Receive function ...................................................................20
8 Media interface connector specifications.........................................23
8.1 Media interface connectors ...................................................24
8.2 Testing recommendations .....................................................27
8.3 Station labeling .....................................................................27
8.4 Isolation requirements...........................................................27
9 Media signal interface.....................................................................28
9.1 Active Output Interface..........................................................28
9.2 Active Input Interface specifications ......................................31
10 Interface signals .............................................................................33
10.1 Receiver ...............................................................................33
10.2 Transmitter ...........................................................................36
11 Cable plant interface specification ..................................................36
11.1 Cable plant specification .......................................................36
11.2 Crossover function ................................................................38
11.3 Connectors, cords, and cross-connect equipment.................38
Tables
1 UTP-MIC contact assignments........................................................24
2 STP-MIC contact assignments ........................................................26
3 Twisted Pair Active Output Interface characteristics ........................31
4 Signal_Detect summary .................................................................35
Figures
1 FDDI links and connections ..............................................................7
Contents
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