网络线测试标准

1.02 * att ca + 4 * att co 1.02 * att ca + 4 * att co
100 MHz 250 MHz Insertion loss
24.0 dB Basic link 94 m
0.948 * att ca + 2 * att co
24.0 dB ห้องสมุดไป่ตู้asic link 94 m
Cat 5 (568A)
100 MHz 100 m
1.967 f + 0.023 f + 0.05 f
Cat 5e (568A)
100 MHz 100 m
1.967 f + 0.023 f + 0.05 f
Cat 5e (568B)
100 MHz 100 m
1.967 f + 0.023 f + 0.05 f
Overview Proposed Performance Specifications for Category 5, Enhanced Category 5 and Category 6 Cabling Per TIA/EIA-568A and draft TIA/EIA-568B NEXT loss, Attenuation, ELFEXT, Return Loss Propagation Delay, Delay Skew, LCL and LCTL
Overview Requirement Specifications
1 tialims.doc 05/22/00 12:36 PM
Notes: 1. The requirements for “traditional” category 5 of TIA/EIA-568A are as represented in TSB-95. 2. The requirements for enhanced category 5 of TIA/EIA-568A are represented in Addendum #5 to TIA/EIA-568A. 3. The new TIA/EIA-568B standard is to replace the TIA/EIA-568 standard, plus all the addenda (up to 5), TSB-67, TSB-72 and TSB-75 and TSB-95. It will include the requirements up to category 5e cabling, but not category 6. 4. Category 6 cabling requirements will be defined in Addendum #1 to TIA/EIA-568B. A substantial amount of development is needed to finalize requirements. One should expect changes from the current draft. Note that the category 6 permanent link requirements do not yet match those for ISO/IEC 11801-2000+ Class E permanent link. This will be discussed further in the TIA TR42 committee. 5. Starting with the TIA/EIA-568B standard, the permanent link will replace the basic link as a test configuration. This overview contains for category 5e and 6 the requirements for the permanent link instead of the basic link. 6. DC resistance requirements are being added in category 6. 7. LCL and LCTL requirements for cat 6 are to be determined (per draft 6). 8. The insertion loss requirements for category 6 now include an allowance for insertion loss deviation (ILD).
Comments:
This document reflects the outcome of the May 2000, TIA TR42 interim meeting in Tyson’s Corner, VA, which addressed requirements for category 6 cabling and current ballots of TIA/EIA568B.1 and TIA/EIA-568B.2. The minor change is that the floor for the return loss of category 5e and cat 6 connecting hardware has a measurement floor of 30 dB, rather than 35 dB. Other requirements were not changed. To be best of the author’s ability, this document matches the contents of the reference documents. However, no guarantee is made that the contents of this document accurately reflect the reference documents. Comments on this document and possible corrections are highly appreciated: e-mail: koeman@tc.fluke.com. Values in square brackets are reflect no formal verification requirements. However, assumptions as stated are made to compute channel, basic link and permanent link pass/fail limits. Sources of information: 1. 2. 3. 4. 5. 6. ANSI/TIA/EIA-568-A-1995 Commercial Building Telecommunications Standard. Approved: October 6, 1995. ANSI/TIA/EIA TSB-95: Additional Transmission Performance Guidelines for 100 Ω 4-Pair Category 5 Cabling. ANSI/TIA/EIA-568-A-5: Additional Transmission Performance Specifications for 100 Ω 4Pair Enhanced Category 5 Cabling. Draft 8.0 of ANSI/TIA/EIA-568-B.1, March 25, 2000. SP-4425-B Commercial Building Telecommunications Cabling Standard. Part 1: General Requirements. Draft 6.0 of ANSI/TIA/EIA-568-B.2, April 14, 2000. SP-4426-C Commercial Building Telecommunications Cabling Standard. Part 2: Balanced Twisted-pair Cabling. Transmission Performance Specification for 4-Pair 100 Ω Category 6 Cabling. Draft 6, May 1, 2000. Fluke Corporation
+ 0.0007 * f
3
100 MHz 250 MHz
0.04 * f
22.0 dB
0.04 * f
19.8 dB 32.8 dB 0.02 * f
0.1 dB min
0.1 dB min
0.1 dB min
0.1 dB min
0.4 dB 100 m
0.4 dB 100 m
0.4 dB 100 m
0.20 dB 0.32 dB 100 m
1.02 * att ca + 4 * att co 1.02 * att ca + 4 * att co
Cat 6 (568B)
250 MHz 100 m
1..808 f + 0.017 f + 0.2 f
100 MHz 250 MHz Connector Insertion loss 100 MHz 250 MHz Channel Insertion loss
22.0 dB
0.04 * f
22.0 dB
Overview Requirement Specifications
Fluke Corporation
2 tialims.doc 05/22/00 12:36 PM
Overview Requirement Specifications Insertion loss
Parameter
Frequency Range Cable Insertion loss
Henriecus Koeman Fluke Corporation Version: May 22, 2000
Copyright notice The Fluke Corporation grants a free, irrevocable license to the TIA to incorporate text contained in this contribution and any modifications thereof in the creation of TIA standards publications; to copyright in the standards’ owner name any standards publication even though it may include portions of this contribution; and at TIA sole discretion to permit others to reproduce in whole or in part the resulting TIA standards publication. . Intellectual Property Statement The author with Fluke Corporation is not aware of patents, the use of which may be essential to a standard resulting in whole or in part from this contribution.
0.948 * att ca + 2 * att co
24.0 dB Permanent link 90 m
0.9 * attca + 3 * attco
+ 0.0003 * f 2 21.3 dB 36.0 dB Permanent link 90 m
0.9 * attca + 3 * attco