1、 TSB-190 June 2011Guidelines on Shared Pathways and Shared Sheaths NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and
2、assisting the purchaser in selecting and obtaining with minimum delay the proper product for their particular need. The existence of such Standards and Publications shall not in any respect preclude any member or non-member of TIA from manufacturing or selling products not conforming to such Standar
3、ds and Publications. Neither shall the existence of such Standards and Publications preclude their voluntary use by Non-TIA members, either domestically or internationally. Standards and Publications are adopted by TIA in accordance with the American National Standards Institute (ANSI) patent policy
4、. By such action, TIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Standard or Publication. This Standard does not purport to address all safety problems associated with its use or all applicable regulatory requirements. It is
5、the responsibility of the user of this Standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations before its use. (From Project No. 3-0396-A-1, formulated under the cognizance of the TIA TR-42 Telecommunications Cabling Systems, TR-42.7
6、 Subcommittee on Telecommunications Copper Cabling Systems (568-B.2 (b) there is no assurance that the Document will be approved by any Committee of TIA or any other body in its present or any other form; (c) the Document may be amended, modified or changed in the standards development or any editin
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8、g patent applications are claimed and called to TIAs attention, a statement from the holder thereof is requested, all in accordance with the Manual. TIA takes no position with reference to, and disclaims any obligation to investigate or inquire into, the scope or validity of any claims of IPR. TIA w
9、ill neither be a party to discussions of any licensing terms or conditions, which are instead left to the parties involved, nor will TIA opine or judge whether proposed licensing terms or conditions are reasonable or non-discriminatory. TIA does not warrant or represent that procedures or practices
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11、esignated as a standard, specification, recommendation or otherwise), whether such reference consists of mandatory, alternate or optional elements (as defined in the TIA Engineering Manual, 4thedition) then (i) TIA disclaims any duty or obligation to search or investigate the records of any other SS
12、O for IPR or letters of assurance relating to any such Normative Reference; (ii) TIAs policy of encouragement of voluntary disclosure (see Engineering Manual Section 6.5.1) of Essential Patent(s) and published pending patent applications shall apply; and (iii) Information as to claims of IPR in the
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16、LATION, OR THE SAFETY OR HEALTH EFFECTS OF THE CONTENTS OR ANY PRODUCT OR SERVICE REFERRED TO IN THE DOCUMENT OR PRODUCED OR RENDERED TO COMPLY WITH THE CONTENTS. TIA SHALL NOT BE LIABLE FOR ANY AND ALL DAMAGES, DIRECT OR INDIRECT, ARISING FROM OR RELATING TO ANY USE OF THE CONTENTS CONTAINED HEREIN
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18、, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. THE FOREGOING NEGATION OF DAMAGES IS A FUNDAMENTAL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. TIA TSB-190 i Guidelines on Shared Pathways and Shared Sheaths TABLE OF CONTE
19、NTS 1 PURPOSE AND SCOPE 1 2 REFERENCES . 1 3 DEFINITIONS, ACRONYMS AND ABBREVIATIONS, AND UNITS OF MEASURE . 1 3.1 General 1 3.2 Definition of terms . 1 3.3 Acronyms and abbreviations . 2 3.4 Units of measure . 2 4 MULTIPLE APPLICATIONS OPERATING OVER DIFFERENT CABLING CATEGORIES AND CABLE CONSTRUCT
20、IONS . 2 5 CATEGORY 6A UTP CABLES FROM DIFFERENT MANUFACTURERS 2 6 CATEGORY 6A UTP CABLES AND OTHER CATEGORY CABLES 2 7 MULTIPLE APPLICATIONS OPERATING UNDER THE SAME CABLE SHEATH 3 7.1 General 3 7.2 Guidelines for shared sheath implementations . 3 Annex A (informative) Data supporting guidelines fo
21、r operating multiple applications over different cable categories or constructions. 4 A.1 General 4 A.2 Noise analysis . 4 A.3 Alien crosstalk margin . 5 A.3.1 Test scenarios 5 A.3.2 Effective alien crosstalk margin computation . 5 Annex B (informative) Data supporting guidelines for using category
22、6A cables from different manufacturers 6 B.1 General 6 B.2 Cables from different manufacturers . 6 B.3 Coupling into the center cable . 7 B.4 Coupling into the outer cable . 8 Annex C (informative) Data supporting guidelines for using category 6A UTP cables and category 6 UTP cables to support 10GBA
23、SE-T . 9 C.1 General 9 C.2 Data supporting guidelines 9 LIST OF FIGURES Figure A.1 Limit of power spectral density of 10GBASE-T versus 1000BASE-T signal values . 4 Figure A.2 Effective alien crosstalk margin computation for worst case category 6A channels . 5 Figure B.1 - Three bundle configuration
24、of category 6A cables . 6 Figure B.2 - Illustration of alien crosstalk coupling into the center cable in a bundle 7 Figure B.3 - Measurements of PSANEXT loss coupling into the center cable in a bundle . 7 Figure B.4 - Illustration of alien crosstalk coupling into the outer cable in a bundle 8 Figure
25、 B.5 - Measurements of PSANEXT loss coupling into the outer cable in a bundle . 8 Figure C.1 - Bundle configuration with seven category 6 cables around one category 6A cable 9 LIST OF TABLES Table C.1 Alien crosstalk margin calculation (ACMC) 9 TIA TSB-190 ii FOREWORD (This foreword is not part of t
26、he Telecommunications Systems Bulletin) This Technical Systems Bulletin was developed by TIA Subcommittee TR-42.7. Approval of this TSB This Bulletin was approved by TIA Subcommittee TR-42.7 and TIA Engineering Committee TR-42, and the American National Standards Institute (ANSI). TIA reviews Bullet
27、ins every 5 years. At that time, Bulletins are reaffirmed, withdrawn, or revised according to the submitted updates. Updates to be included in the next revision should be sent to the committee chair or to TIA. Contributing Organizations More than 30 organizations within the telecommunications indust
28、ry contributed their expertise to the development of this Bulletin (including manufacturers, consultants, end users, and other organizations). Annexes This document and all of its annexes are informative. Introduction This Technical Systems Bulletin (TSB) provides guidelines regarding the placement
29、of different category cabling in the same pathway and the operation of different applications within the same sheath. The ANSI/TIA-568-C series of Standards specify the structure and performance requirements for cabling systems that support a wide range of applications. Stewardship Telecommunication
30、s infrastructure affects raw material consumption. The infrastructure design and installation methods also influence product life and sustainability of electronic equipment life cycling. These aspects of telecommunications infrastructure impact our environment. Since building life cycles are typical
31、ly planned for decades, technological electronic equipment upgrades are necessary. The telecommunications infrastructure design and installation process magnifies the need for sustainable infrastructures with respect to building life, electronic equipment life cycling and considerations of effects o
32、n environmental waste. Telecommunications designers are encouraged to research local building practices for a sustainable environment and conservation of fossil fuels as part of the design process. Purpose This TSB provides guidance and supporting data related to multiple applications operating over
33、 different cable categories or constructions sharing the same pathways, alien crosstalk interference between category 6A UTP cables manufactured by different manufacturers, alien crosstalk interference between category 6A UTP cables and other category cables, and multiple applications running within
34、 the same sheath. Specification of criteria This TSB is informative and does not contain normative requirements. A note in the text, table, or figure is used for emphasis or offering informative suggestions, or providing additional information.TIA TSB-190 1 1 PURPOSE AND SCOPE This TSB provides guid
35、ance and supporting data related to: multiple applications operating over different cable categories or constructions sharing the same pathways, alien crosstalk interference between category 6A UTP cables manufactured by different manufacturers, alien crosstalk interference between category 6A UTP c
36、ables and other category cables, and multiple applications running within the same sheath. 2 REFERENCES The following standards contain provisions that, through reference in this TSB, constitute provisions of this TSB. At the time of publication, the edition indicated was valid. All standards are su
37、bject to revision; parties to agreements based upon this TSB are encouraged to investigate the possibility of applying the most recent edition of the Standard indicated. ANSI and TIA maintain registers of currently valid national standards published by them. ANSI/TIA-568-C.2, Balanced Twisted-Pair T
38、elecommunications Cabling and Components Standard, 2009 IEEE Std. 802.3TM, Standard for Information technology Telecommunications and information exchange between systems Local and metropolitan area networks Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and P
39、hysical Layer Specifications, 2008 TIA-232-F, Interface between Data Terminal Equipment and Data Circuit-Terminating Equipment Employing Serial Binary Data Interchange, 1997 TIA TSB-155-A, Guidelines for the Assessment and Mitigation of Installed Category 6 Cabling to Support 10GBASE-T, 2010 3 DEFIN
40、ITIONS, ACRONYMS AND ABBREVIATIONS, AND UNITS OF MEASURE 3.1 General The generic definitions in this clause have been formulated for use by the entire family of telecommunications infrastructure standards. 3.2 Definition of terms 3270: A class of terminals (known as “display devices“) normally used
41、to communicate with IBM mainframes as well as a protocol that uses terminal emulation to access some mainframe-based applications through a proprietary high-speed communications interface and coaxial cable. alien crosstalk: The unwanted signal coupling from a disturbing pair of a 4-pair channel, per
42、manent link, or component to a disturbed pair of another 4-pair channel, permanent link, or component. cable sheath: A covering over the optical fiber or conductor assembly that may include one or more metallic members, strength members, or jackets. TIA TSB-190 2 3.3 Acronyms and abbreviations ACMC
43、alien crosstalk margin computation AXT alien crosstalk ISDN integrated services digital network PSAACRF power sum attenuation to alien crosstalk ratio far-end PSANEXT power sum alien near-end crosstalk PSD power spectral density SNR signal to noise ratio TSB Telecommunications Systems Bulletin UTP u
44、nshielded twisted-pair 3.4 Units of measure dB decibel ft feet, foot m meter Mb/s megabit per second MHz megahertz 4 MULTIPLE APPLICATIONS OPERATING OVER DIFFERENT CABLING CATEGORIES AND CABLE CONSTRUCTIONS Category 5e, category 6, and category 6A cabling supporting non-10GBASE-T applications (e.g.
45、100BASE-TX and 1000BASE-T) may be placed unbundled or in adjacent bundles within the same pathway with category 6A and TIA TSB-155-A compatible category 6 cabling supporting the 10GBASE-T application without adversely affecting application performance. Category 6A cabling should be used for all new
46、installations intended to support the 10GBASE-T application. See annexes A and C for supporting data. In addition, balanced twisted-pair cabling (e.g. category 6A, category 6, and category 5e) can share the same pathways as series 6 or series 11 coaxial cabling and optical fiber cabling. 5 CATEGORY
47、6A UTP CABLES FROM DIFFERENT MANUFACTURERS Compliant category 6A UTP cables from different manufacturers may be placed bundled, unbundled, or in adjacent bundles within the same pathway. Alien crosstalk requirements will inherently be met by compliance with ANSI/TIA-568-C.2. Supporting data (see ann
48、ex B) demonstrates that adjacent compliant category 6A UTP cable bundles from different manufacturers comply with the alien crosstalk requirements specified in ANSI/TIA-568-C.2. 6 CATEGORY 6A UTP CABLES AND OTHER CATEGORY CABLES Compliant category 6A UTP cables and other category cables may be place
49、d bundled, unbundled, or in adjacent bundles within the same pathway without exceeding the alien crosstalk requirements specified in ANSI/TIA-568-C.2. Supporting data (see annex C) demonstrates that compliant category 6A UTP and category 6 cables that are in the same bundle comply with the alien crosstalk recommendations specified in TIA TSB-155-A. TIA TSB-190 3 7 MULTIPLE APPLICATIONS OPERATING UNDER THE SAME CABLE SHEATH This clause provides information and guidance related to the operation of multiple applications under the same cable sheath. 7.1 Genera
