Fibre Channel cable

Copies of this document may be purchased from: dpANS NCITS.xxx-200xGlobal Engineering, 15 Inverness Way East, NCITS/Project 1235D/Rev 7.2Englewood, CO 80112-5704Phone: (800) 854-7179 or (303) 792-2181 Fax: (303) 792-2192

FIBRE CHANNEL

PHYSICAL INTERFACES(FC-PI)REV 7.2

working draft proposedAmerican National Standard

for Information Systems

April 9, 2000

Secretariat:Information Technology Industry Council

ABSTRACT: This standard describes the enhancement to the ANSI X3.230, Fibre Channel Physical andSignalling Interface (FC-PH) and to the ANSI X3.297, Fibre Channel Physical and Signalling Interface - 2(FC-PH-2) and is an addendum to both these documents.

NOTE:This is a draft proposed American National Standard of Accredited Standards Committee NCITS. As such, this is not a completed standard. The T11 Technical Committee may modify this document as a result of comments received during public review and its approval as a standard.

POINTS OF CONTACT:

Kumar Malavali (T11 Chairman)Brocade Communications

San Jose, CA 951??(408) Fax: (408) E-Mail:

I. Dal Allan(Fibre Channel Working Group Chairman)ENDL14426 Black Walnut CourtSaratoga, CA 95070(408) 867-6630 Fax: (408) 867-2115E-Mail: [email protected]

Edward L. Grivna (T11 Vice Chairman)Cypress Semiconductor2401 East 86th StreetBloomington, MN 55425(612) 851-5046 Fax: (612) 851-5087E-Mail: [email protected]

Schelto Van Doorn (Editor)Infineon Technologies Corporation1730 North First Street MS 22303San Jose, CA 95112(408) 501-5665 Fax: (408) 501-5670E-Mail: [email protected]

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ANSI dpANS NCITS.xxx-200x

American National Standardfor Information Technology

Fibre Channel Physical Interfaces(FC-PI)

Secretariat

Information Technology Industry Council

Approved , 200

American National Standards Institute, Inc.

Abstract

This standard describes the enhancement to the ANSI X3.230, Fibre Channel Physical and Signalling In-terface (FC-PH) and to the ANSI X3.297, Fibre Channel Physical and Signalling Interface - 2 (FC-PH-2)and is an addendum to both these documents.

iii

Approval of an American National Standard requires verification by ANSI that therequirements for due process, consensus, and other criteria for approval havebeen met by the standards developer.

Consensus is established when, in the judgement of the ANSI Board of StandardsReview, substantial agreement has been reached by directly and materiallyaffected interests. Substantial agreement means much more than a simplemajority, but not necessarily unanimity. Consensus requires that all views andobjections be considered, and that a concerted effort be made towards theirresolution.

The use of American National Standards is completely voluntary; their existencedoes not in any respect preclude anyone, whether he has approved the standardsor not, from manufacturing, marketing, purchasing, or using products, processes,or procedures not conforming to the standards.

The American National Standards Institute does not develop standards and will inno circumstances give interpretation on any American National Standard.Moreover, no person shall have the right or authority to issue an interpretation ofan American National Standard in the name of the American National StandardsInstitute. Requests for interpretations should be addressed to the secretariat orsponsor whose name appears on the title page of this standard.

CAUTION NOTICE: This American National Standard may be revised orwithdrawn at any time. The procedures of the American National StandardsInstitute require that action be taken periodically to reaffirm, revise, or withdraw thisstandard. Purchasers of American National Standards may receive currentinformation on all standards by calling or writing the American National StandardsInstitute.

American National Standard

Published by

American National Standards Institute11 W. 42nd Street, New York, New York 10036

Copyright 200x by American National Standards InstituteAll rights reserved

No part of this publication may be reproduced in anyform, in an electronic retrieval system or otherwise,without prior written permission of the publisher.

Printed in the United States of America

INSERT CODE HERE

XX-00-199x Physical Interface 7.2 April 9, 2000

Table of Contents5

1 Scope - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 15

2 References - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 152.1 Normative references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.1.1 Approved references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152.2 Informative references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172.3 References under development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3 Definitions and conventions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 193.1 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193.2 Editorial conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.2.1 Abbreviations, acronyms, and symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243.2.2 Data rate abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243.2.3 Synonyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243.2.4 Acronyms and other abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.3 Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4 Structure and Concepts - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 274.1 FC-0 general description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284.2 FC-0 interface overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304.3 Data flow stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

5 FC-PI functional characteristics - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 325.1 General characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325.2 FC-PI States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5.2.1 Transmitter FC-PI (FC-0) States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335.2.2 Receiver States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

5.3 Response to input data phase jumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345.4 Limitations on invalid code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345.5 Receiver initialization time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345.6 Loss of signal (Rx_LOS) function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345.7 FC-PI nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355.8 Interoperability points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 365.9 FC-PI technology options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

6 Optical interface specification - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 456.1 SM data links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

6.1.1 SM optical output interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 456.1.2 SM optical input interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 486.1.3 SM jitter budget . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 486.1.4 SM tradeoffs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

6.2 MM data links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 526.2.1 MM short wavelength (SW) data links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 526.2.2 MM optical input interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 526.2.3 MM jitter budget . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

7 Optical interface receptacle specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 577.1 SC optical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

7.1.1 Performance requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 577.1.2 SC optical plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 577.1.3 SC Duplex optical receptacle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58


7.2 SG optical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5866

7.2.1 SG optical receptacle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 587.2.2 SG optical connector plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

7.3 LC optical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 617.3.1 LC optical receptacle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 617.3.2 LC optical plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

7.4 MT-RJ optical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 647.4.1 MT-RJ optical receptacle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 647.4.2 MT-RJ optical connector plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 657.4.3 Alignment pin/alignment structure diameter option . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

8 Optical fiber cable plant specification - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 678.1 SM cable plant specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

8.1.1 SM optical fiber type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 678.1.2 SM cable plant loss budget . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 678.1.3 SM optical return loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

8.2 MM cable plant specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 678.2.1 MM optical fiber types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 688.2.2 MM modal bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 688.2.3 MM cable plant loss budget . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 688.2.4 MM optical return loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 688.2.5 MM chromatic dispersion parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

8.3 Connectors and splices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

9 Electrical cable interface specification - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 719.1 Transmitted signal characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 729.2 Received signal characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 749.3 Jitter characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 759.4 Eye masks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

9.4.1 Transmitted eye mask at T, T and T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 779.4.2 Received eye mask at R, R and R. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 789.4.3 Jitter tolerance masks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

9.5 Impedance specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 809.6 Electrical TxRx connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 819.7 Compliance points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 819.8 Driver characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 839.9 Receiver characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 839.10 Example TxRx connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

10 Electrical cable plant and connector specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - 8510.1 Shielding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8510.2 Cable interoperability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8510.3 Unbalanced cable connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

10.3.1 Inter-enclosure connectors for unbalanced cable . . . . . . . . . . . . . . . . . . . . . . . . . . . 8510.3.2 Intra-enclosure connectors for unbalanced cable . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

10.4 Balanced cable connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8710.4.1 Inter-enclosure connectors for balanced cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8710.4.2 Intra-enclosure connectors for balanced cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8910.4.3 Non-device inter-enclosure connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Annex A (informative)Test Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

A.1 Transmit interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93A.1.1 Optical spectrum measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

A.1.2 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

A.1.3 Jitter measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

A.2 Receive interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94A.3 Poormans curve fit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94A.4 Relative intensity noise (RIN) (OMA) measuring procedure . . . . . . . . . . . . . . . . . . . . . . . 95

A.4.1 Test objective . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95A.4.2 General test description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96A.4.3 Component descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96A.4.4 Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

A.5 Optical modulation amplitude (OMA) test procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98A.6 Optical receiver stress test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99A.7 Measurement of the receiver electrical upper cutoff frequencies . . . . . . . . . . . . . . . . . . . 101

Annex B Electrical interface example (informative) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

B.1 Communications levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104B.1.1 PECL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104B.1.2 SSTL_2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

B.2 Serial interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105B.2.1 Transmit serial interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105B.2.2 Receiver serial interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106B.2.3 Receiver retimed clock and data serial interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

B.3 Parallel interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106B.3.1 Voltage levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106B.3.2 Bus data rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106B.3.3 Transmit parallel interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106B.3.4 Receive parallel interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

B.4 REFCLK[0:1] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109B.5 Support functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

B.5.1 Acquisition of receiver bit synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109B.5.2 Receive byte alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110B.5.3 Loopback function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Annex C (informative)Optical cable plant usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Annex D (informative)Optical Receptacle Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

D.1 Combined Connector Mechanical-Optical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 113D.2 Receptacle axial pull test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114D.3 Receptacle insertion/withdrawal force test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114D.4 Receptacle optical repeatability test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114D.5 Receptacle optical cross plug repeatability test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114D.6 Plug axial pull test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114D.7 Plug insertion/withdrawal force test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114D.8 Plug off axis pull test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114D.9 Cable/ plug pull strength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Annex E (normative)Tx-Off and Rx-Loss of Signal detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

E.1 Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117E.2 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117E.3 Functional and Timing Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

E.3.1 Tx_Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118


E.3.2 Rx_LOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11888

E.4 Optical Tx_Off and Rx_LOS Signal Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119E.5 Electrical Tx_Off Signal Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119E.6 Electrical Rx_LOS Signal Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119E.7 Methods of Measurement for Electrical Rx_LOS Thresholds

(informative) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Annex F (informative)SG optical connector requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

F.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122F.1.1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122F.1.2 Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123F.1.3 Product Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125F.1.4 TIA 604 (FOCIS) Connector Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127F.1.5 Optical Fiber Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128F.1.6 Fiber Optic Communications Cable Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . 128F.1.7 Supplementary information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

F.2 Outline drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132F.3 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

F.3.1 Dimensional requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132F.3.2 Performance requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

F.4 Measurement and performance requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134F.4.1 Visual and mechanical inspection: FOTP 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134F.4.2 Attenuation: FOTP 34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134F.4.3 Return loss: FOTP 107 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134F.4.4 Low temperature: FOTP 188 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134F.4.5 Temperature life: FOTP 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134F.4.6 Humidity: FOTP 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135F.4.7 Strength of coupling mechanism: FOTP 185 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135F.4.8 Durability: FOTP 21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135F.4.9 Impact: FOTP 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135F.4.10 Flex: FOTP 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136F.4.11 Twist: FOTP 36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136F.4.12 Cable retention: FOTP 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Annex J (informative)LC optical connector requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

J.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139J.1.1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139J.1.2 Related documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140J.1.3 Product Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142J.1.4 TIA 604 (FOCIS) Connector Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144J.1.5 Optical Fiber Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145J.1.6 Fiber Optic Communications Cable Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . 145J.1.7 Supplementary information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

J.2 OUTLINE DRAWINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148J.3 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

J.3.1 Dimensional Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148J.3.2 Performance Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

J.4 Measurement and performance requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149J.4.1 Visual and Mechanical Inspection: FOTP 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149J.4.2 Attenuation: FOTP 34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149J.4.3 Return Loss: FOTP 107 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150J.4.4 Low Temperature: FOTP 188 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150


J.4.5 Temperature Life: FOTP 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1509

J.4.6 Humidity: FOTP 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150J.4.7 Strength of Coupling Mechanism: FOTP 185 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151J.4.8 Durability: FOTP 21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151J.4.9 Impact: FOTP 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151J.4.10 Flex: FOTP 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151J.4.11 Twist: FOTP 36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152J.4.12 Cable Retention: FOTP 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

Annex K (informative)MT-RJ Optical Connector Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

K.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155K.1.1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155K.1.2 Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156K.1.3 Product Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158K.1.4 TIA 604 (FOCIS) Connector Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160K.1.5 TIA 604-12 (FOCIS-12) Adapter Designation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161K.1.6 Optical Fiber Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161K.1.7 Fiber Optic Communications Cable Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . 162K.1.8 SUPPLEMENTARY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

K.2 OUTLINE DRAWINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165K.3 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

K.3.1 Dimensional Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166K.3.2 Performance Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

K.4 Measurement and performance requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167K.4.1 Visual and mechanical inspection: FOTP 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167K.4.2 Attenuation: FOTP 34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167K.4.3 Return Loss: FOTP 107 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167K.4.4 Low Temperature: FOTP 188 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167K.4.5 Temperature Life: FOTP 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167K.4.6 Humidity: FOTP 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168K.4.7 Strength of Coupling Mechanism: FOTP 185 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168K.4.8 Durability: FOTP 21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168K.4.9 Impact: FOTP 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168K.4.10 Flex: FOTP 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169K.4.11 Twist: FOTP 36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169K.4.12 Cable Retention: FOTP 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169


List of figures11

Figure 1. Fibre channel structure - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 27Figure 2. Node functional configuration - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 28Figure 3. FC-0 Link - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 29Figure 4. Fabric - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 29Figure 5. FC-0 Path - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 29Figure 6. Fibre channel building wiring - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 30Figure 7. Data flow stages - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 31Figure 8. FC variant nomenclature - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 35Figure 9. Example of physical location of reference and interoperability points - - - - - - - - - 36Figure 10. Use of Internal Connector and Retimer - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 37Figure 11. Media interchange component TX interoperability point examples - - - - - - - - - - 38Figure 12. Media interchange component RX interoperability point examples - - - - - - - - - - 39Figure 13. Hub interoperability point example - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 40Figure 14. Examples of interoperability points - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 41Figure 15. Overview of the signal specification architecture - - - - - - - - - - - - - - - - - - - - - - 42Figure 16. Transmitter eye diagram mask - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 45Figure 17. Sinusoidal jitter mask - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 49Figure 18. 1.06GBd SM 10km link - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 50Figure 19. 2.12GBd SM 10km link - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 51Figure 20. 4.25GBd SM 10km link - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 51Figure 21. SC optical connector - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 57Figure 22. SG receptacle - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 59Figure 23. SG connector plug envelope dimensions - - - - - - - - - - - - - - - - - - - - - - - - - - - 60Figure 24. LC connector - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 61Figure 25. LC receptacle dimensions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 62Figure 26. LC Connector Plug Envelope Dimensions - - - - - - - - - - - - - - - - - - - - - - - - - - - 63Figure 27. MT connector and receptacle - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 64Figure 28. Active Device receptacle Interface - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 65Figure 29. MT-RJ Connector Plug Interface Dimensions - - - - - - - - - - - - - - - - - - - - - - - - 66Figure 30. Normalized (left) and absolute (right) eye diagram masks at T, T and T. - - - - 77Figure 31. Eye diagram mask at R, R and R - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 78Figure 32. Sinusoidal jitter mask - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 79Figure 33. Inter-enclosure transmitter compliance point T - - - - - - - - - - - - - - - - - - - - - - - 82Figure 34. Inter-enclosure receiver compliance point R - - - - - - - - - - - - - - - - - - - - - - - - - 82Figure 35. Intra-enclosure transmitter compliance point T - - - - - - - - - - - - - - - - - - - - - - - 82Figure 36. Intra-enclosure receiver compliance point R - - - - - - - - - - - - - - - - - - - - - - - - - 82Figure 37. Test loads - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 83Figure 38. Example xxx-SE-EL-S inter-enclosure TxRx connection with 75 unbalanced cable - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 84Figure 39. Example xxx-DF-EL-S inter-enclosure TxRx with 150 balanced cable - - - - - - 84Figure 40. Balanced cable wiring - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 87Figure 41. Style-1 balanced connector receptacle contact locations - - - - - - - - - - - - - - - - 88Figure 42. Style-2 plug and receptacle - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 88Figure 43. Style-2 balanced connector receptacle contact locations - - - - - - - - - - - - - - - - 89Figure 44. Intra-enclosure integral FC device connector - - - - - - - - - - - - - - - - - - - - - - - - 90Figure 45. Contact numbering for integral FC device connector - - - - - - - - - - - - - - - - - - - 91Figure A.1. Eye diagram - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 95Figure A.2. RIN (OMA) test setup - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 96Figure A.3. Optical modulation amplitude test equipment configuration - - - - - - - - - - - - - - 98Figure A.4. Optical modulation amplitude waveform measurement - - - - - - - - - - - - - - - - - 99Figure A.5. Required characteristics of the conformance test signal at gR - - - - - - - - - - - 100


Figure A.6. Apparatus for generating stressed receive conformance test signal at gR - - - - 10112

Figure A.7. Test setup for receiver bandwidth measurement - - - - - - - - - - - - - - - - - - - - - 101Figure B.1. Fibre channel electrical interface example block diagram - - - - - - - - - - - - - - - 104Figure B.2. PECL communication levels - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 105Figure B.3. SSTL_2 compatible communication levels - - - - - - - - - - - - - - - - - - - - - - - - - - 105Figure B.4. Retimed interface signal timing - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 106Figure B.5. Transmit parallel interface timings: 106,25 MBd - - - - - - - - - - - - - - - - - - - - - - 107Figure B.6. Transmit parallel interface timings: 212,5 MBd - - - - - - - - - - - - - - - - - - - - - - - 107Figure B.7. Receive parallel interface timings: 106,25 MBd - - - - - - - - - - - - - - - - - - - - - - 108Figure H.1. Assembled connector set. type SG connector - - - - - - - - - - - - - - - - - - - - - - - 121Figure H.2. FOCIS 7 kit arrangement - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 132Figure H.3. FOCIS 7 pach cord arrangements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 132Figure H.4. Assembled connector set, type LC connector - - - - - - - - - - - - - - - - - - - - - - - 138Figure H.5. FOCIS 10 Kit Arrangements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 148Figure H.6. FOCIS 10 Duplex Adapter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 148Figure H.7. FOCIS 10 pachtch cord arrangements - - - - - - - - - - - - - - - - - - - - - - - - - - - - 148Figure K.1. Assembled Connector Set, Type MT-RJ Connector - - - - - - - - - - - - - - - - - - - 154Figure K.2. MT-RJ Plug Kit Arrangements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 165Figure K.3. Variant A MT-RJ Adapter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 165


List of Tables13

Table 1. ISO convention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24Table 2. Data rate abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24Table 3. Acronyms and other abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . .25Table 4. Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26Table 5. FC-PI technology options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42Table 6. Singlemode link classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46Table 7. Transmit pulse noise filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47Table 8. Tx Pulse Noise Filter Attenuation Tolerance . . . . . . . . . . . . . . . . . . . . . .47Table 9. SM jitter output, pk-pk, max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48Table 10. SM jitter tolerance, pk-pk, min. . . . . . . . . . . . . . . . . . . . . . . . . . . . .49Table 11. Multimode 50 mm link classes . . . . . . . . . . . . . . . . . . . . . . . . . . . .53Table 12. Multimode 62.5 mm link classes . . . . . . . . . . . . . . . . . . . . . . . . . . .54Table 13. MM jitter output, pk-pk, max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55Table 14. MM jitter tolerance, pk-pk, min. . . . . . . . . . . . . . . . . . . . . . . . . . . . .55Table 15. Dimensional table for SG receptacle . . . . . . . . . . . . . . . . . . . . . . . . .59Table 16. Dimensional table for SG plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60Table 17. Dimensions of the active device receptacle . . . . . . . . . . . . . . . . . . . . . .62Table 18. Dimensional table for LC plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63Table 19. MT-RJ active device receptacle dimensions . . . . . . . . . . . . . . . . . . . . .65Table 20. Dimensional table for MT-RJ plug . . . . . . . . . . . . . . . . . . . . . . . . . . .66Table 21. Alignment pin/alignment structure diameter options for FOCIS 12 plugs . . . . . . .66Table 22. Single-mode cable plant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67Table 23. Multimode cable plant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67Table 24. Multimode fiber types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68Table 25. Multimode bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68Table 26. General electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . .71Table 27. Transmitted signal characteristics at T, T and T . . . . . . . . . . . . . . . . . .72Table 28. Delivered signal characteristics to R, R and gR . . . . . . . . . . . . . . . . . .74Table 29. Jitter output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75Table 30. Jitter tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76Table 31. FC-PI measured impedance 1,2 . . . . . . . . . . . . . . . . . . . . . . . . . . .80Table 32. Optional inter-enclosure contact uses . . . . . . . . . . . . . . . . . . . . . . . . .87Table A.1. Filter 3 dB point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97Table D.1. Multimode cable link power budget . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111Table D.2. Alternate (lower bandwidth) multimode cable link power budget . . . . . . . . . . . . 111Table D.3. Alternate (higher bandwidth) multimode cable link power budget . . . . . . . . . . . . 112Table E.1. Plug/Receptacle Mechanical-Optical Requirements . . . . . . . . . . . . . . . . . . . . . 113Table E.2. Connector test tolerances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113Table G.1. Tx-Off timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118Table G.2. Rx-LOS timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118Table G.3. Optical Rx_LOS Detection Thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119Table G.4. Electrical Rx_LOS Detection Thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119Table H.1. Variant position #1 indicates Component Arrangement: . . . . . . . . . . . . . . . . . . 125Table H.2. Variant position #2 indicates Component Configuration: . . . . . . . . . . . . . . . . . . 125Table H.3. Variant position #3 indicates the Optical Fiber Type . . . . . . . . . . . . . . . . . . . . . 126Table H.4. Variant position #4 indicates the fiber Coating / Buffer Sizes . . . . . . . . . . . . . . . 126Table H.5. Variant position #5 indicates the number of cabled fibers . . . . . . . . . . . . . . . . . 126Table H.6. Variant position #6 indicates the Cable Designation . . . . . . . . . . . . . . . . . . . . . 126Table H.7. Variant position #7 indicates the Cable Length . . . . . . . . . . . . . . . . . . . . . . . . . 126Table H.8. Optical Fiber Transmission Performance Requirements . . . . . . . . . . . . . . . . . . 129Table H.9. Variant identification numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131


Table I.1. Variant position #1 indicates Component Arrangement . . . . . . . . . . . . . . . . . . . . 14214

Table I.2. Variant position #2 indicates Component Configuration . . . . . . . . . . . . . . . . . . . 143Table I.3. Variant position #3 indicates the Optical Fiber Type . . . . . . . . . . . . . . . . . . . . . . 143Table I.4. Variant position #4 indicates the fiber Coating / Buffer Sizes . . . . . . . . . . . . . . . . 143Table I.5. Variant position #5 indicates the number of cabled fibers . . . . . . . . . . . . . . . . . . 143Table I.6. Variant position #6 indicates the Cable Designation . . . . . . . . . . . . . . . . . . . . . . 144Table I.7. Variant position #7 indicates the Cable Length . . . . . . . . . . . . . . . . . . . . . . . . . . 144Table I.8. Optical Fiber Transmission Performance Requirements . . . . . . . . . . . . . . . . . . . 146Table I.9. Variant identification numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147Table K.1. Variant position #1 indicates Component Arrangement . . . . . . . . . . . . . . . . . . . 158Table K.2. Variant position #2 indicates Component Configuration . . . . . . . . . . . . . . . . . . . 159Table K.3. Variant position #3 indicates the Optical Fiber Type . . . . . . . . . . . . . . . . . . . . . 159Table K.4. Variant position #4 indicates the fiber Coating / Buffer Sizes . . . . . . . . . . . . . . . 159Table K.5. Variant position #5 indicates the number of cabled fibers . . . . . . . . . . . . . . . . . . 159Table K.6. Variant position #6 indicates the Cable Designation . . . . . . . . . . . . . . . . . . . . . 160Table K.7. Variant position #7 indicates the Cable Length . . . . . . . . . . . . . . . . . . . . . . . . . 160Table K.8. Optical Fiber Transmission Performance Requirements . . . . . . . . . . . . . . . . . . 162Table K.9. Variant identification numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

draft proposed NCITS StandardXX-00-199xdraft proposed NCITS Standardfor Information Technology

Fibre Channel Physical Interface (FC-PI)

1 ScopeThis International Standard describes the physical interface of high performance serial links forsupport of the Upper Level Protocols (ULPs) associated with HIPPI, IPI, SCSI, IP and others.

This Standard incorporates features from the standards described in clause 2. Where needed,changes are or have been proposed to the appropriate ANSI NCITS technical committees to ensurethis document remains a strict ANSI standard.

2 ReferencesThe following standards contain provisions which, through reference in this text, constitute provisionsof this International Standard. At the time of publication, the editions indicated were valid. Allstandards are subject to revision, and parties to agreements based on this International Standard areencouraged to investigate the possibility of applying the most recent editions of the following list ofstandards. Members of IEC and ISO maintain registers of currently valid International Standards.

Copies of the following documents can be obtained from ANSI: Approved ANSI standards, approvedand draft international and regional standards (ISO, IEC, CEN/CENELEC, ITUT), and approvedforeign standards (including BSI, JIS, and DIN). For further information, contact ANSI CustomerService Department at 212-642-4900 (phone), 212-302-1286 (fax) or via the World Wide Web athttp://www.ansi.org.

2.1 Normative references

2.1.1 Approved references

[1] IEC 169-8 - R.F. Coaxial Connectors with Inner Diameter of Outer Conductor 6.5 mm (0.256 in) with Bayonet Lock (Type BNC)

[2] IEC 169-17 - R.F. Coaxial Connectors with Inner Diameter of Outer Conductor 6.5 mm (0.256in) with Threaded Lock (Type TNC)

[3] IEC-169-15 - R.F. Coaxial Connectors (SMA)****

[4] IEC 61754-4 ???????????????????

[5] IEC 61754-4-5 ??????????????//

[6] IEC 807-3 - DB9****

[7] ANSI/TIA/EIA-604: Fiber Optic Connector Intermateability Standards (FOCIS), Nov. 1993

[8] FOCIS7 (ANSI/TIA/EIA-604-7): - Fiber Optic Connector Intermateability Standard Type SG,1999.15


[9] ANSI/TIA/EIA-604-10: FOCIS 10, Fiber Optic Connector Intermateability Standard Type LC,16

1999.

[10] ANSI/TIA/EIA 604-12: FOCIS 12, Fiber Optic Connector Intermateability Standard Type MT-RJ, (Currently pending public review in the development process by TIA FO-6.3 as SP 4172).

[11] FOTP-6 (EIA/TIA-455-6B) - Cable Retention Test Procedure for Fiber Optic CableInterconnecting (March 1992)

[12] FOTP-29 (EIA/TIA-455-29A) - Refractive Index Profile, Transverse Interference Method: 1stEd. Aug. 1981, 2nd Ed. Oct. 1989. (Measures core diameter, numerical aperture, and refractiveindex profile of multimode fiber) Reaffirmed 02/08/1999 until 02/2004

[13] FOTP-30 (EIA/TIA-455-30B) - Frequency Domain Measurement of Multimode Optical FiberInformation Transmission Capacity: 1st Ed. Sept. 1982, 2nd Ed. Aug. 1988, 3rd Ed. Oct. 1991

[14] FOTP-34 (EIA/TIA-455-34A) - Interconnection Device Insertion Loss Test, November 1995

[15] FOTP-44 (EIA/TIA-455-44B) - Refractive Index Profile, Refracted Ray Method: 1st Ed. Jan.1984, 2nd Ed. Oct. 1989, 3rd Ed. Sept. 1992. (Measures core diameter, numerical aperture,and refractive index profile of multimode fiber)

[16] FOTP-47 (EIA/TIA-455-47B) - Output Farfield Radiation Pattern Measurement: 1st Ed. Sept.1983, 2nd Ed. May 1989, 3rd Ed. Aug. 1992 (Measures numerical aperture of multimode fiber)

[17] FOTP-48 (EIA/TIA-455-48B) - Diameter Measurement of Optical Fibers Using Laser-BasedMeasurement Instruments: 1st Ed. Dec. 1983, 2nd Ed. Oct. 1987, 3rd Ed. Dec. 1990

[18] FOTP-51 (EIA/TIA-455-51A) - Pulse Distortion Measurement of Multimode Glass Optical fiberInformation Transmission Capacity: 1st Ed. Sept. 1983, 2nd Ed. May 1991

[19] FOTP-54 (EIA/TIA-455-54B) - Mode Scrambler Requirements for Overfilled LaunchingConditions to Multimode Fibers: 1st Ed. Sept. 1982, 2nd Ed. Nov. 1990, 3rd Ed. Aug. 1998

[20] FOTP-58 (EIA/TIA-455-58A) - FOTP-58 Core Diameter Measurement of Graded-Index OpticalFibers, Nov. 1990

[21] FOTP-107 (EIA/TIA-107A) - Return Loss for Fiber Optic Components: 1st Ed. Feb. 1989, 2ndEd. Mar. 1999

[22] FOTP-127 (EIA/TIA-455-127) - Spectral Characteristics of Multimode Laser DiodesPerformance, Nov. 1991

[23] FOTP-168 (EIA/TIA-455-168A) - Chromatic Dispersion Measurement of Multimode Graded-Index and Single-Mode Optical Fibers by Spectral Group Delay Measurement in the TimeDomain: 1st Ed. July 1987, 2nd Ed. March 1992

[24] FOTP-171 (EIA-455-171) - Attenuation by Substitution Measurement- For Short LengthMultimode and Single-Mode Fiber Cable Assemblies, July 1987

[25] FOTP-176 (EIA/TIA- 455-176) - Measurement Method for Optical Fiber Geometry byAutomated Grey-Scale Analysis. 1st Ed. June 1993, Reaffirmed 02/08/1999 until 02/2004

[26] FOTP-177 (EIA/TIA-455-177A) - Numerical Aperture Measurement of Graded-Index OpticalFibers: 1st Ed. Nov. 1989, 2nd Ed. Aug. 1992 ("Umbrella" document, indicating factors requiredby FOTP-29, FOTP-44, and FOTP-47 to map to each other)

[27] FOTP-187 (EIA/TIA-455-187) - Engagement and Separation Force Measurement of Fiber OpticConnector Sets, June 1991, Reaffirmed 02/03/1999 until 02/2004

[28] EIA-403-A - Precision Coaxial Connectors for CATV Applications (75 Ohms)

[29] EIA/TIA-492AAAA-A - Detail Specification for 62.5 m Core Diameter/125 m CladdingDiameter Class 1a Multimode, Graded Index Optical Waveguide Fibers, Jan. 1998


[30] EIA/TIA-492AAAB - Detailed Specification for 50 m Core Diameter/125 m Cladding17

Diameter Class 1a Multimode, Graded Index Optical Waveguide Fibers, Nov. 1998

[31] EIA/TIA-492CAAA - Detail Specification for Class IVa Dispersion-Unshifted Single-ModeOptical Waveguide Fibers Used in Communications Systems, May 1998

[32] OFSTP-2 (EIA/TIA-526-2) - Effective Transmitter Output Power Coupled into Single-ModeFiber Optic Cable, Oct. 1989

[33] OFSTP-3 (EIA/TIA-526-3) - Fiber Optic Terminal Equipment Receiver Sensitivity and MaximumReceiver Input, Oct. 1989

[34] OFSTP-4 (EIA/TIA-526-4A) - Optical Eye Pattern Measurement Procedure, Nov. 1997

[35] OFSTP-7 (EIA/TIA-526-7) - Optical Power Loss Measurement of Installed Single-Mode FiberCable Plant, Aug. 1998

[36] OFSTP-11 (EIA/TIA-526-11) - Measurement of Single-Reflection Power Penalty for Fiber OpticTerminal Equipment, Dec. 1991, Reaffirmed 11/09/1998 to 11/2003

[37] OFSTP-14 (EIA/TIA-526-14A) - Optical Power Loss Measurement of Installed Multimode FiberCable Plant, Nov. 1990

[38] EIA/TIA 568A - Commercial Building Telecommunications Wiring Standard, Oct. 1995

[39] Food and Drug Administration (FDA) / Department of Health and Human Services (DHHS)Regulations 21 CFR Chapter I, Subchapter J, Part 1040.10, Performance standards for light-emitting products

[40] ANSI Z136.2-1988, Standard for the safe use of optical fiber communication systems utilizinglaser diode and LED sources

[41] IEC 60825-1, Radiation safety of laser products - Equipment classification, requirements anduser's guide, 1sr Ed. Nov. 1993, Amended Sep. 1997

[42]NCITS MJS technical report

2.2 Informative references

[43] Gigabit Ethernet Networking, Macmillen Technical Publication, ISBN 1-7870-062-0 Chapter9, the gigabit ethernet optical link model

2.3 References under development

At the time of publication, the following referenced standards were still under development. Forinformation on the current status of the documents, or regarding availability, contact the relevantstandards body or other organization as indicated.

[44] FC-FS *****

[45] EIA-700-A0AF [SP-3652] Inetgral FC Device Connector

[46] SFF-8451 Specification for SCA-2 Unshielded Connections

[47] SFF-8045 40-pin SCA-2 Connector with Parallel Selection

[48] SFF-8480 Specification for HSSDB9

[49] IEC 61076-3-103 Detailed specification for rectangular connectors with non-removable ribbon-cable contacts on 1.25mm pitch, single row, used with high-speed serial data connector(HSSDC)

[50] SFF-8420 Style-2 Copper Connector


NOTE For more information on the current status of SFF documents, contact the SFF committee at 408-18

867-6630 (phone), or 408-867-2115 (fax). To obtain copies of these documents, contact the SFF committeeat14426 Black Walnut Court, Saratoga, CA 95070 at 408-867-6630 (phone) or from FaxAccess at 408-741-1600.


3 Definitions and conventions19

For the purposes of this International Standard, the following definitions, conventions, abbreviations,acronyms, and symbols apply.

3.1 Definitions3.1.1 T, R: Reference points used for establishing signal budgets at the chip pins of the

transmitter and receiver in an FC device or retiming element.

3.1.2 T, R: Interoperability points used for establishing signal budget at the internal connector nearest the alpha point unless the point also satisfies the definition for delta or gamma in which case it must be either a delta or a gamma point

3.1.3 T, R: Interoperability points used for establishing signal budget at the internal connector of a removable PMD element.

3.1.4 T, R: Interoperability points used for establishing signal budgets at the external enclosure connector.

3.1.5 attenuation: The transmission medium power or amplitude loss expressed in units of dB.

3.1.6 average power: The optical power measured using an average-reading power meter when transmitting valid 8B/10B transmission characters.

3.1.7 bandwidth: In FC-PI context, the corner frequency of a low-pass transmission characteristic, such as that of an optical receiver. The modal bandwidth of an optical fiber medium is expressed in units of MHz-km.

3.1.8 baud: A unit of signaling speed, expressed as the maximum number of times per second the signal can change the state of the signal on the transmission line or other medium. (Units of baud are sec-1) Note: With the Fibre Channel transmission scheme, a signal event represents a single transmission bit. [(Adapted from IEEE Std. 610.7-1995 [A16].12)].

3.1.9 bit error rate (BER): The probability of a transmitted bit being erroneously received in a communication system. BER is the number of bits output from a receiver that differ from the transmitted bits, divided by the number of transmitted bits.

3.1.10 bit synchronization: The condition in which a receiver is delivering retimed serial data at the required BER.

3.1.11 BNC: Acronym for a Bayonet-Neil-Councilman coaxial cable connector. Specifications for BNC style connectors are defined in EIA/TIA 403-A and MIL-C-39012.

3.1.12 Byte: An eight-bit entity with its least significant bit denoted as bit 0 and most significant bit as bit 7. The most significant bit is shown on the left side in FC-PH, unless specifically indicated otherwise.

3.1.13 cable plant: All passive communications elements (e.g., optical fiber, twisted pair, coaxial cable, connectors, splices, etc.) between a transmitter and a receiver.

3.1.14 center wavelength (laser): The value of the central wavelength of the operating, modulated laser. This is the wavelength (see FOTP-127) where the effective optical power resides.

3.1.15 character: Any Transmission Character associated by FC-FS transmission code with a FC-FS data byte or special code. Transmission characters are generated and interpreted only by FC-FS.

3.1.16 coaxial cable: An unbalanced electrical transmission medium consisting of concentric conductors separated by a dielectric material with the spacings and material arranged to give a specified electrical impedance.


3.1.17 compliance point: Compliance points are defined as those interoperability points at which 20

the interoperability specifications are met. They may include beta, gamma, and delta points for transmitters and receivers.

3.1.18 dispersion: A term used to denote pulse broadening and distortion. The two general categories of dispersion are modal dispersion, due to the difference in the propagation velocity of the propagation modes in a multimode fiber, and chromatic dispersion, due to the difference in propagation of the various spectral components of the optical source. Similar effects exist in electrical media when the velocity of propagation (VP) of the spectral components of a non-sinusoidal signal are not constant over frequency.

3.1.19 duty cycle distortion (DCD): Difference in the mean pulse width of a 1 pulse compared to the mean pulse width of a 0 pulse in a clock-like (repeating 0,1,0,1,...) bit sequence. DCD is part of the DJ distribution and is measured at the ideal receiver threshold point.

3.1.20 electrical fall time: The time interval for the falling edge of an electrical pulse to transit between specified percentages of the signal amplitude. In the context of FC-PI, the measurement points are the 80% and 20% voltage levels.

3.1.21 electrical rise time: The time interval for the rising edge of an electrical pulse to transit between specified percentages of the signal amplitude. In the context of FC-PI, the measurement points are the 20% and 80% voltage levels.

3.1.22 Enclosure: The outermost electrically conducting boundary (that acts as an EMI barrier) containing one or more FC devices.

3.1.23 External connector: A connector, whose purpose is to carry the FC signals into and out of an Enclosure, that exits the Enclosure with only minor compromise to the shield effectiveness of the Enclosure.

3.1.24 eye opening (horizontal): The time interval across the eye, measured at the average voltage or optical power level, which contains all but 10-12 of the population at the same level.

3.1.25 FC device: An entity that supports the FC protocol functions through one or more of the connectors defined in this document.

3.1.26 FC device connector: A connector defined in this document which carries the FC serial data signals into and out of the FC device.

3.1.27 fiber: A general term used to cover all transmission media specified in FC-PI (see clauses 3 and 5).

3.1.28 fiber optic cable: A jacketed optical fiber or fibers.

3.1.29 Fiber Optic Test Procedure (FOTP): Standards developed and published by the Electronic Industries Association (EIA) under the EIA-RS-455 series of standards.

3.1.30 interface connector: An optical or electrical connector which connects the media to the Fibre Channel transmitter or receiver. The connector set consists of a receptacle and a plug.

3.1.31 Internal connector: A connector, whose purpose is to carry the FC signals within an enclosure (may be shielded or unshielded).

3.1.32 Internal FC Device: An FC device whose FC device connector is contained within an enclosure.

3.1.33 Interoperability point: T, R, T, R T, R3.1.34 intersymbol interference: The effect on a sequence of symbols in which the symbols are

distorted by transmission through a limited bandwidth medium to the extent that adjacent symbols begin to interfere with each other.


3.1.35 jitter: The deviation from the ideal timing of an event. Jitter is composed of both 21

deterministic and Gaussian (random) content. Low frequency deviations are tracked by the clock recovery circuit, and do not directly affect the timing allocations within a bit cell. Jitter that is not tracked by the clock recovery circuit directly affects the timing allocations in a bit cell. For FC-PI the lower cutoff frequency of the clock recovery circuit is the bit rate divided by 2500. Jitter is measured at the differential zero crossing for balanced electrical signals, the average voltage level for unbalanced electrical signals, and the nominal receiver threshold power level for optical systems.

3.1.36 jitter, data dependent: The jitter which is added when the transmission pattern is changed from a clock like to a non-clock like pattern. Includes ISI.

3.1.37 jitter, deterministic (DJ): Jitter with non-Gaussian probability density function. Deterministic jitter is always bounded in amplitude and has specific causes. Four kinds of deterministic jitter are identified: duty cycle distortion, data dependent, sinusoidal, and uncorrelated (to the data) bounded. DJ is characterized by its bounded, peak-to-peak value.

3.1.38 jitter, random (RJ): Jitter that is characterized by a Gaussian distribution. Random jitter is defined to be the peak-to-peak value for a BER of 10-12, taken to be 14 times the standard deviation of the Gaussian distribution.

3.1.39 laser chirp: A phenomenon in lasers where the wavelength of the emitted light changes during modulation.

3.1.40 level: 1. A document artifice, e.g. FC-0, used to group related architectural functions. No specific correspondence is intended between levels and actual implementations. 2. In FC-PI context, a specific value of voltage (e.g., voltage level).

3.1.41 limiting amplifier: An active circuit with amplitude gain that keeps the output levels within specified levels, but does not reduce jitter.

3.1.42 link: 1. Two unidirectional fibers transmitting in opposite directions and their associated transmitters and receivers. 2. A synonym for TxRx Connection.

3.1.43 mandatory: A function which is required to be supported by a compliant implementation of FC-PI.

3.1.44 mode partition noise (MPN): Noise in a laser based optical communication system caused by the changing distribution of laser energy partitioning itself among the laser modes (or lines) on successive pulses in the data stream. The effect is a different center wavelength for the successive pulses resulting in arrival time jitter attributable to chromatic dispersion in the fiber.

3.1.45 Node: A collection of one or more N_Ports controlled by a level above FC-FS.

3.1.46 numerical aperture: The sine of the radiation or acceptance half angle of an optical fiber, multiplied by the refractive index of the material in contact with the exit or entrance face. See FOTP-177.

3.1.47 Open Fiber Control (OFC): A safety interlock system used in some early Fibre Channel variants to control the optical power level on an open optical fiber cable. OFC is not used in any physical variant specified by FC-PI.

3.1.48 optical fall time: The time interval required for the falling edge of an optical pulse to transit between specified percentages of the signal amplitude. For lasers the transitions are measured between the 80% and 20% points.

3.1.49 optical fiber: Any filament or fiber, made of dielectric material, that guides light.


3.1.50 optical fiber system test practice (OFSTP): Standards developed and published by the 22

Electronic Industries Association (EIA) under the EIA/TIA-526 series of standards.

3.1.51 optical modulation amplitude: The absolute difference between the optical power of a logic one level and the optical power of a logic zero level.

3.1.52 optical receiver overload: The condition of exceeding the maximum acceptable value of the received average optical power at point gamma R of figure 12 on page 39 to achieve a BER < 10-12.

3.1.53 optical receiver sensitivity: The minimum acceptable value of average received signal at point gamma R of figure 12 on page 39 to achieve a BER < 10-12. It takes into account power penalties caused by use of a transmitter with a worst-case output. In the case of an optical path it does not include power penalties associated with dispersion, jitter, effects related to the modal structure of the source or reflections from the optical path. These effects are specified separately in the allocation of maximum optical path penalty and receiver stress-test as discribed in figure A.6 on page 99.

3.1.54 optical path penalty: A link penalty to account for those effects other than attenuation.

3.1.55 optical reference plane: The plane that defines the optical boundary between the plug and the receptacle.

3.1.56 optical rise time: The time interval required for the rising edge of an optical pulse to transit between specified percentages of the signal amplitude. For lasers the transitions are measured between the 20% and 80% points.

3.1.57 optical return loss (ORL): See return loss.

3.1.58 optical stressed receiver sensitivity: !!!! need text !!!!

3.1.59 optional: Characteristics that are not required by FC-PI. However, if any optional characteristic is implemented, it shall be implemented as defined in FC-PI.

3.1.60 plug: The cable half of the interface connector which terminates an optical or electrical signal transmission cable.

3.1.61 Port: A generic reference to an N_Port or F_Port.

3.1.62 receiver: In FC-PI context, an electronic circuit (Rx) that converts a signal from the media (optical or electrical) to an electrical retimed or non-retimed) serial logic signal.

3.1.63 receptacle: The fixed or stationary half of the interface connector which is part of the transmitter or receiver.

3.1.64 reclocker: A type of repeater specifically designed to modify data edge timing such that the data edges have a defined timing relation with respect to a bit clock recovered from the (FC) data at its input.

3.1.65 Reference points: T, R3.1.66 reflections: Power returned to point gamma T of figure 6 on page 30 by discontinuities in

the physical link.

3.1.67 repeater: An active circuit designed to modify the (FC) signals that pass through it by changing any or all of the following parameters of that signal: amplitude, slew rate, and edge to edge timing. Repeaters have jitter transfer characteristics. Types of repeaters include retimers, reclockers and amplifiers.

3.1.68 retimer: A type of repeater specifically designed to modify data edge timing such that the data edges have a defined timing relation with respect to a bit clock derived from a timing reference other than the (FC) data at its input. A retimer shall be capable of inserting and


removing words from the (FC) data passing through it. In the context of jitter methodology, a 23

retimer resets the accumulation of jitter such that the output of a retimer has the jitter budget of alpha T.

3.1.69 return loss: The ratio (expressed in dB) of incident power to reflected power, when a component or assembly is introduced into a link or system. May refer to optical power or to electrical power in a specified frequency range.

3.1.70 RIN12(OMA): Relative Intensity Noise. Laser noise in dB/Hz with 12 dB optical return loss, with respect to the optical modulation amplitude.

3.1.71 run length: Number of consecutive identical bits in the transmitted signal e.g., the pattern 0011111010 has a run length of five (5).

3.1.72 running disparity: A binary parameter indicating the cumulative Disparity (positive or negative) of all previously issued Transmission Characters.

3.1.73 Special Character: Any Transmission Character considered valid by the Transmission Code but not equated to a Valid Data Byte. Special Characters are provided by the Transmission Code for use in denoting special functions.

3.1.74 spectral width (RMS): The weighted root mean square width of the optical spectrum. See FOTP-127.

3.1.75 synchronization: Receiver identification of a Transmission-Word boundary.

3.1.76 TNC: Acronym for a Threaded-Neil-Councilman coaxial cable connector. Specifications for TNC style connectors are defined in MIL-C-39012 and MIL-C-23329.

3.1.77 transceiver: A transmitter and receiver combined in one package

3.1.78 Transmission Character: Any encoded character (valid or invalid) transmitted across a physical interface specified by FC-PI. Valid Transmission Characters are specified by the Transmission Code and include Data and Special Characters.

3.1.79 Transmission Code: A means of Encoding data to enhance its Transmission Characteristics. The Transmission Code specified by FC-FS is byte-oriented, with (1) Valid Data Bytes and (2) Special Codes encoded into 10-bit Transmission Characters.

3.1.80 transmitter: In FC-PI context, an Electronic