1、 2500 Wilson BoulevardSuite 300Arlington, VA 22201-3834USA+1.703.907.7700FAX +1.703.907.7727The Telecommunications Industry Association represents the communications sector ofJuly 14, 2004 SUBJECT: Standards Proposal No. 3-4133-RV2, proposed revision of TIA/EIA-604-10-A “FOCIS-10 - Fiber Optic Conne
2、ctor Intermateability Standard, Type LC“ (if approved, to be published as TIA-604-10-B) BACKGROUND: The attached material was prepared by TIA FO-4.3 Subcommittee on Fiber Optic Interconnecting Devices, and was approved by the chair of the formulating group. SP-3-4133-RV2 is herewith submitted to TIA
3、 membership and others as a step toward standardization NOTE: Please use the following format for comments: Company Name - Comment No. Type of Comment - Technical or Editorial Reference - Page No., Clause No., Line Suggested Change - Change From:. To:. Add:, Delete: Rationale for Technical Change CO
4、MMENT PERIOD EXPIRES: AUGUST 30, 2004 Prior to this date, comments may be submitted for consideration as noted on page two of this form. Following the expiration of the comment period, and consideration by the relevant committee, this Proposal will be submitted to the TIA Technical Standards Subcomm
5、ittee (TSSC) for final approval as to acceptance or rejection of this Standards Proposal. T# 8048B U I L D I N G G L O B A L C O M M U N I C A T I O N S Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted witho
6、ut license from IHS-,-,-PLEASE FILL OUT AND SIGN THIS FORM AND RETURN IT WITH ANY COMMENTS TO: TIA Standards Secretariat Telecommunications Industry Assoc. 2500 Wilson Blvd., Suite 300 Arlington, VA 22201-3834 (FAX: 703/907-7727) SUBJECT: Standards Proposal No. 3-4133-RV2, proposed revision of TIA/E
7、IA-604-10-A “FOCIS-10 - Fiber Optic Connector Intermateability Standard, Type LC“ (if approved, to be published as TIA-604-10-B) COMMENT PERIOD EXPIRES: AUGUST 30, 2004 USER PRODUCER USER/PRODUCER GENERAL INTEREST Please circle one only to indicate the most accurate description of the relevance of t
8、his Standards Proposal to your company. This information is required by ANSI to process your comments. DATE:_ NAME:_ Please Print TEL:_ NAME:_ Signature E-MAIL_ COMPANY:_ _ ADDRESS:_ _-page 2-Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo rep
9、roduction or networking permitted without license from IHS-,-,-NOTICE This document is a TIA Engineering Standards Proposal, rather than an interim or final Standard. It is published for purposes of comment and is subject to further review and modification by the TIA Technical Standards Subcommittee
10、 (TSSC), which may accept or reject the Standards Proposal. Accordingly, readers of this Standards Proposal are cautioned against relying on information contained therein prior to the adoption of a final standard. TIA disclaims any liability or responsibility for the consequences of such reliance. P
11、ublished by TELECOMMUNICATIONS INDUSTRY ASSOCIATION 2004 2500 Wilson Boulevard Arlington, VA 22201 All rights reserved Printed in U.S.A. PRICE: $65.00Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without
12、license from IHS-,-,-Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA/EIA-604-10A i FOCIS 10A FIBER OPTIC CONNECTOR INTERMATEABILITY STANDARD TYPE LC CONTENTS 1 INTRODUCTION
13、1 2 ADAPTER STANDARD 3 3 PLUG STANDARD 5 4 APLICATION 8 5 POLARIZATION MAINTENANCE 8Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA/EIA-604-10A ii BLANK PAGECopyright Teleco
14、mmunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA/EIA-604-10A 1 FOCIS 10A FIBER OPTIC CONNECTOR INTERMATEABILITY STANDARD 1 Introduction 1.1 Scope FOCIS 10A presents the intermateability stan
15、dard for simplex and duplex connectors with the commercial designation LC, and is issued as an addendum to TIA/EIA 604, Fiber Optic Connector Intermateability Standards. The provisions of TIA/EIA 604 apply to this document. 1.2 Objective Intermateability standards define the minimum physical attribu
16、tes of mating connector components. Fully dimensioned components are not within the scope or intent of FOCIS 10A. The requirements in FOCIS 10A have been selected with the objective of ensuring that any combination of plugs and adapters conforming to the requirements of FOCIS 10A will mechanically i
17、ntermate, and that intermated connector assemblies will meet a common level of performance. The common level of performance of an intermated connector assembly is the least demanding set of performance requirements in the separate performance specifications of each of the products in the assembly; s
18、ee TIA/EIA 604. 1.3 Limitations Realization of the objectives for FOCIS 10A may be limited by the following considerations: 1.3.1 Configuration Options There are configuration options for both plugs and adapters in FOCIS 10A that impose limitations on the combinations of plugs and adapters that shou
19、ld be selected in a connector assembly. For plugs to be inserted in the adapter, the key option, k, for both plugs must be compatible with the keying option of the adapter Both plugs should have the same ferrule diameter option, t. An assembly with different diameter options may have a higher loss t
20、han anticipated. Both plugs should have the same angle of contact option, a. An increase in loss may be expected if the plugs with different options are mated, and the polish on the ferrule may be damaged. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot fo
21、r ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA/EIA-604-10A 2 1.3.2 Common performance The following considerations limit the application of common performance: The location of the optical cores, figure 3.2.3a, and the apex offsets, clause 3.2.5, are defined, without
22、 tolerances, by their true positions. To achieve common performance, the distributions of the actual positions of these features should be centered on their respective true positions. Tuning of the connector plugs may improve performance when plugs are mated with plugs that have been similarly tuned
23、. Tuning, however, offsets the cores relative to the center of the ferrule and common performance can not be expected between tuned plugs and untuned plugs. Tuned plugs are assembled so the offset of the fiber falls in a preferred location with respect to the key; see clause 3.2.8. As an alternative
24、 to tuning for fiber offset, plugs could be tuned for apex offset. This standard does not control the intrinsic loss that may occur between fibers in a connector assembly. Intrinsic loss between fibers must be added to the basic connector loss. 1.3.3 Resolution Cases of combinations of plugs and ada
25、pters where mechanical intermateability or the common level of performance is not achieved should be resolved through the cooperation of the user and the connector and adapter manufacturer(s). 1.4 Drawing practices To be in compliance with ANSI and ISO Engineering Practices, the following shall appl
26、y: 1. Where the tolerance of form is not specified, the limits of the dimensions for a feature control the form as well as the size. The combined effects of size and form variations may not exceed the envelope of perfect form at the maximum material condition (MMC). 2. Where interrelated features of
27、 size (features shown with a common axis or center plane) have no geometric tolerance of location or runout specified, the limits of the dimensions for a feature control the location tolerance as well as the size. When interrelated features are at the MMC, they shall be perfectly located relative to
28、 each other as indicated by the drawing. 3. Where perpendicular features (features shown at right angles) have no geometric tolerance of orientation or runout specified, the limits of the dimensions for a feature control the orientation tolerance as well as the size. When perpendicular features are
29、at the MMC, they shall be perfectly oriented to each other as indicated by the drawing. 4. As the size of a feature departs from the MMC, variations in form, location and orientation are permissible. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for Resa
30、leNo reproduction or networking permitted without license from IHS-,-,-TIA/EIA-604-10A 3 2 Adapter Standard 2.1 Adapter designation The designation for FOCIS 10A adapter is FOCIS 10A-A-n-k-m where A designates an adapter n is the number of fibers k defines the keying configuration m defines the moun
31、ting configuration 2.2 Adapter requirements FOCIS 10A adapters shall meet the requirements of this section. 2.2.1 Adapter interface dimensions The dimensional requirements for FOCIS 10A adapters are defined as follows: n = 1 Figure 2.2.1a, Simplex adapter interface and Figure 2.2.1b Simplex junior a
32、dapter interface n = 2 Figure 2.2.1c, Duplex adapter interface 2.2.2 Adapter sleeves The adapter sleeve is a split (resilient), and the sleeve may be either fixed or floating within the adapter. The minimum inside diameter of the sleeve is specified by the force required to remove a gage pin from a
33、sleeve. The force required to remove a gage pin from the sleeve in FOCIS 10A adapter shall be 1.0 N to 2.5 N. The procedures of FOTP 158 shall be used to measure the withdrawal force. The pin gauge shall be as defined in Figure 2.2.2 The maximum inside diameter of a sleeve is in effect limited by th
34、e common level of performance that the adapter is to achieve. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA/EIA-604-10A 4 2.2.3 Adapter keying options Keying refers to dif
35、ferences in the interface between FOCIS 10A plugs and adapters that affect the ability of plugs and adapters to be connected or that alter the performance of the resulting connector assembly. The keying interfaces have been defined: k = 1 Figure 2.2.1a, Senior Adapter Half k = 2. Figure 2.2.1b. Juni
36、or Adapter Half Adapters can be made with either, k = 1 and k = 1 adapter halves or k = 1 and k = 2. adapter halves. Adapters with k = 1 and k = 2 is mounted so the k = 2 half is mounted behind the panel protected from mechanical elements. Adapter with k = 2 / k = 2 option is not recognized as FOCIS
37、 10A compliant. 2.2.4 Adapter mounting options The adapter mounting options are defined in Table 2. Table 2 - Adapter options Adapter Mounting Option Type of mounting m = 0 Unspecified mounting m = 1 Simplex Snap-in Flange Mounting m = 2 Duplex Snap-in Flange Mounting m = 3 Duplex Snap-in Flange Mou
38、nting compatible with FOCIS 3A m = 3 m = 4 Duplex Snap-in Flange Mounting compatible with FOCIS 3A m = 1 and m = 2 Adapters whose mounting features are not defined are identified with the option m = 0. The dimensions of the surfaces of the adapter that interface with the mounting panel are defined b
39、y the cutouts in the panel on which the adapter is mounted. FOCIS 10A adapters for m = 1, m = 2, m = 3, and m = 4 shall be capable of being mounted on panels with the dimensions in Figure 2.2.4. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo
40、reproduction or networking permitted without license from IHS-,-,-TIA/EIA-604-10A 5 3 Plug standard 3.1 Plug designation The complete designation for FOCIS 10A connector plug is: FOCIS 10A P-d-n-k-t-a where P designates a plug d defines the plug design n is the number of fibers k defines the keying
41、arrangement t defines the ferrule diameter a is the angle of contact 3.2 Plug requirements FOCIS 10A plugs shall meet the requirements of this section. 3.2.1 Plug interface option There are two plug interface option for FOCIS 10A plugs. The requirement for each of these interface options are: d = 1
42、The elements of the plug that control the interface with the adapter, for plugs offered under this option, must meet the dimensional requirements of figure 3.2.3a Simplex plug interface (d=1). d = 2 The elements of the plug that control the interface with the adapter, for plugs offered under this op
43、tion, must meet the dimensional requirements of figure 3.2.3b, Duplex plug interface (d=2). 3.2.2 Ferrule diameter option Ferrule diameters for FOCIS 10A plugs are specified in Table 3. Table 3 - Ferrule diameter t Minimum (mm) Maximum (mm) Fiber 1 1.2483 1.2495 Singlemode 2 1.2485 1.2495 Singlemode
44、 3 1.2467 1.2495 Multimode The ferrule tolerance t = 1 and t = 2 is typically applied to plugs with singlemode fiber. The ferrule tolerance t = 3 is typically applied to plugs with multimode fiber. 3.2.3 Number of fibers option Copyright Telecommunications Industry Association Provided by IHS under
45、license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA/EIA-604-10A 6 Plugs with option n = 1 Figure 3.2.3a designates a simplex fiber plug. Plugs with option n = 2 Figure 3.2.3b designates a duplex fiber plug. 3.2.4 Plug keying option Plugs with option
46、 k = 1, designates a floating fiber plug with a spring. Plugs with option k = 2, designates a fixed fiber plug without a spring. Plugs with option k =1 can be mated in adapters with either k = 1 or the k = 2 option. Plugs with option k = 2 can only be mated in adapter option k =2. The dimensional re
47、quirements for these options are defined in 3.2.3a and 3.2.3b. 3.2.5 Angle of contact option Contact angle is the angle that the plane of contact makes to a plane perpendicular to the axis of the ferrule. The plane of contact is defined as plane A-A in Figure 3.2.5 a = 0, designates an angle of 0 a
48、= 8, designates an angle of 8 Requirements: For a = 0, and a = 8: The True Position for the apex is at the center of the ferrule as projected on the plane of contact in Figure 3.2.5 ( = 0) See Clause 1.3.2. For a = 8: The orientation between the key and the plane of contact to be shown in Figure 3.2.5. 3.2.6 Ferrule extension and contact force The tr
