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BSI PD ISO/IEC TR 11801-9905:2018

BSI PD ISO/IEC TR 11801-9905:2018

$167.15

Information technology. Generic cabling systems for customer premises – Guidelines for the use of installed cabling to support 25GBASE-T application

Published By Publication Date Number of Pages
BSI 2018 42
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This part of ISO/IEC 11801, which is a Technical Report,

  1. provides guidance on how to select and assess installed channels which conform to ISO/IEC 11801‑1, and clarify if they also support ISO/IEC/IEEE 8802‑3:2017/AMD3 for 25GBASE-T;

  2. specifies the methods to assess whether installed channels constructed with Category 7A, 7, or 6A components meet the 25GBASE-T requirements;

  3. provides guidance to identify which channels are likely to meet the 25GBASE-T requirements to avoid unnecessary testing;

  4. provides mitigation techniques to improve the performance of installed channels to meet the 25GBASE-T requirements;

  5. provides cabling recommendations for new installations.

NOTE 1 The channel transmission performance specified in this document is derived from the 25GBASE-T requirements in ISO/IEC/IEEE 8802‑3:2017/AMD3.

NOTE 2 This document does not re-specify component or channel definitions of ISO/IEC 11801‑1.

PDF Catalog

PDF Pages PDF Title
2 undefined
4 CONTENTS
7 FOREWORD
9 INTRODUCTION
10 1 Scope
2 Normative references
3 Terms, definitions and abbreviations
11 4 Cabling channel specifications for 25 GBASE-T
4.1 General
4.2 25GBASE-T application specifications
4.2.1 Return loss
Tables
Table 1 – Return loss for a channel
12 4.2.2 Insertion loss/attenuation
Table 2 –Return loss values for a channel at key frequencies
Table 3 – Insertion loss for a channel
13 4.2.3 NEXT
Table 4 – Insertion loss values for a channel at key frequencies
Table 5 – NEXT for a channel
14 Table 6 – NEXT values for a channel at key frequencies
Table 7 – PS NEXT for a channel
15 4.2.4 Attenuation to crosstalk ratio at the near-end (ACR-N)
4.2.5 Attenuation to crosstalk ratio at the far-end (ACR-F).
Table 8 – PS NEXT values for a channel at key frequencies
Table 9 – ACR-F for a channel
16 Table 10 – ACR-F values for a channel at key frequencies
Table 11 – PS ACR -F for a channel
Table 12 – PS ACR-F values for a channel at key frequencies
17 4.2.6 Propagation delay
4.2.7 Delay skew
4.2.8 Unbalance attenuation and coupling attenuation
Table 13 – Propagation delay for a channel
Table 14 – Propagation delay values for a channel at key frequencies
Table 15 – Delay skew for a channel
18 4.2.9 Alien crosstalk
Table 16 – PS ANEXT for a channel
Table 17 – PS ANEXT values for a channel at key frequencies
19 4.3 Associated risk of 25GBASE-T operation over installed cabling
4.4 Characterization of balanced channels using Category 7A components
4.4.1 General
Table 18 – PS AACR-F for a channel
Table 19 – PS AACR-F values for a channel at key frequencies
Table 20 – Risk of 25GBASE-T operation over installed cabling channels
20 4.4.2 Selection of channels for qualification
4.4.3 Return loss
Table 21 – Formulae for return loss limits for a channel
Table 22 – Return loss limits for a channel at key frequencies
21 4.4.4 Insertion loss
4.4.5 Near-end crosstalk loss (NEXT)
Table 23 – Formula for insertion loss limits for a channel
Table 24 – Insertion loss limits for a channel at key frequencies
Table 25 – Formulae for pair-to-pair NEXT limits for a channel
22 Table 26 – Pair-to-pair NEXT limits for a channel at key frequencies
Table 27 – Formulae for PS NEXT limits for a channel
Table 28 –PS NEXT limits for a channel at key frequencies
23 4.4.6 Attenuation to crosstalk loss ratio near-end (ACR-N)
Table 29 – ACR-N limits for a channel at key frequencies
24 4.4.7 Attenuation to crosstalk ratio far-end (ACR-F)
Table 30 – PS ACR-N limits for a channelat key frequencies
Table 31 – Formulae for ACR-F limits for a channel
25 Table 32 – ACR-F limits for a channelat key frequencies
Table 33 – Formulae for PS ACR-F limits for a channel
Table 34 – PS ACR-F limits for a channel at key frequencies
26 4.4.8 Alien (exogenous) crosstalk
Table 35 – Formulae for PS ANEXT limits for a channel
Table 36 – PS ANEXT limits for a channel at key frequencies
Table 37 – Formula for PS AACR-F limits for a channel
27 4.4.9 Propagation delay
4.4.10 Delay skew
4.4.11 Coupling attenuation
Table 38 – PS AACR-F limits for a channel at key frequencies
Table 39 – Formula for propagation delay limits for a channel
Table 40 – Propagation delay limits for a channel at key frequencies
28 4.4.12 Alien crosstalk and coupling attenuation
4.5 Characterization of balanced channels using Category 7 components
4.5.1 General
Table 41 – Formula for coupling attenuation limits for a channel
Table 42 – Coupling attenuation limits for a channel at key frequencies
Table 43 – Alien crosstalk and coupling attenuation
29 4.5.2 Selection of channels for qualification
4.5.3 Return loss
Table 44 – Formulae for return loss limits for a channel
Table 45 – Return loss limits for a channel at key frequencies
30 4.5.4 Insertion loss
4.5.5 Near-end crosstalk loss (NEXT)
Table 46 – Formula for insertion loss limits for a channel
Table 47 – Insertion loss limits for a channel at key frequencies
Table 48 – Formulae for pair-to-pair NEXT limits for a channel
31 Table 49 – Pair-to-pair NEXT limits for a channel at key frequencies
Table 50 – Formulae for PS NEXT limits for a channel
Table 51 – PS NEXT limits for a channel at key frequencies
32 4.5.6 Attenuation to crosstalk loss ratio near-end (ACR-N)
Table 52 – ACR-N limits for a channel at key frequencies
33 4.5.7 Attenuation to crosstalk ratio far-end (ACR-F)
Table 53- PS ACR-N limits for a channel atkey frequencies
Table 54 – Formulae for ACR-F limits for a channel
34 Table 55 – ACR-F limits for a channel at key frequencies
Table 56 – Formulae for PS ACR-F limits for a channel
Table 57 – PS ACR-F limits for a channel at key frequencies
35 4.5.8 Alien (exogenous) crosstalk
Table 58 – Formulae for PS ANEXT limits for a channel
Table 59 – PS ANEXT limits for a channel at key frequencies
Table 60 – Formula for PS AACR-F limits for a channel
36 4.5.9 Propagation delay
4.5.10 Delay skew
4.5.11 Coupling attenuation
Table 61 – PS AACR-F limits for a channel at key frequencies
Table 62 – Formula for propagation delay limits for a channel
Table 63 – Propagation delay limits for a channel at key frequencies
37 4.5.12 Alien crosstalk and coupling attenuation
4.6 Characterization of balanced channels using Category 6A components
4.6.1 General
Table 64 – Formula for coupling attenuation limits for a channel
Table 65 – Coupling attenuation limits for a channel at key frequencies
Table 66 – Alien crosstalk and coupling attenuation for shielded channels
38 4.6.2 Selection of channels for qualification
4.6.3 Test specifications for channels made out of Category 6A components
5 Guidance for mitigation procedures to improve the cabling of existing installations
5.1 General
5.2 Mitigation procedures related to internal noise
5.3 Mitigation procedures related to exogenous noise (alien crosstalk)
39 6 Guidance for cabling for new installations
40 Bibliography

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BSI PD ISO/IEC TR 11801-9905:2018
$167.15