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BSI PD ISO/IEC TR 11801-9909:2020

BSI PD ISO/IEC TR 11801-9909:2020

$142.49

Information technology. Generic cabling systems for customer premises – Evaluation of balanced cabling in support of 25 Gbit/s for reach greater than 30 metres

Published By Publication Date Number of Pages
BSI 2020 24
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PDF Catalog

PDF Pages PDF Title
2 undefined
4 CONTENTS
6 FOREWORD
8 INTRODUCTION
9 1 Scope
2 Normative references
3 Terms and definitions
3.1 Terms and definitions
3.2 Abbreviated terms
10 4 Extended reach channel specifications
4.1 General
4.2 Channel performance enhancement methods for increased SNR
4.2.1 General
11 4.2.2 Reduced delay and delay skew
4.2.3 Enhanced cable
4.2.4 Enhanced connector
4.3 Example channel specifications with length scaling
4.3.1 General
Tables
Table 1 – Enhancement methods for 25 Gbit/s extended reach
12 4.3.2 Return loss (RL)
4.3.3 Insertion loss (IL)
Table 2 – Formulae for return loss specifications for example 50 m channel
Table 3 – Formulae for insertion loss specifications for example 50 m channel
13 4.3.4 Near-end crosstalk loss (NEXT)
4.3.5 Attenuation to crosstalk loss ratio near-end (ACR-N)
Table 4 – Formulae for pair-to-pair NEXT specifications for example 50 m channel
Table 5 – Formula for PS NEXT specifications for example 50 m channel
14 4.3.6 Attenuation to crosstalk ratio far-end (ACR-F)
4.3.7 Alien (exogenous) crosstalk
Table 6 – Formulae for ACR-F specifications for example 50 m channel
Table 7 – Formulae for PS ACR-F specifications for example 50 m channel
15 4.3.8 DC loop resistance
4.3.9 Propagation delay
4.3.10 Delay skew
Table 8 – Formulae for PS ANEXT specifications for example 50 m channel
Table 9 – Formulae for PS AACR-F specifications for example 50 m channel
Table 10 – Formulae for propagation delay specifications for a 50 m channel
Table 11 – Delay skew specifications for a 50 m channel
16 4.3.11 Unbalance attenuation near end (TCL) and far end (ELTCTL), and coupling attenuation
Table 12 – TCL for example 50 m channel
Table 13 – ELTCTL for example 50 m channel
Table 14 – Coupling attenuation for example 50 m channel for E1 and E2
17 Annex A (informative)Reduced delay and delay skew
A.1 Reduced delay relation to extended reach
A.1.1 General
A.1.2 Example reduced delay evaluation
A.2 Delay relation to insertion loss (IL)
A.2.1 General
18 A.2.2 Relation of variable relative permittivity to attenuation
A.2.3 Relation of dissipation factor to attenuation:
20 Annex B (informative)Enhanced capacity
B.1 Enhanced cabling components
B.1.1 General
B.1.2 Enhanced cable
B.1.3 Enhanced connector
B.2 Channel SNR margin-to-capacity
B.2.1 General
B.2.2 Margin-to-capacity calculation and comparison
21 B.2.3 Margin-to-capacity versus frequency
Figure B.1 – Margin-to-capacity versus frequency for 25 Gbit/s rate for 50 m reach
22 B.2.4 Margin-to-capacity versus reach
Figure B.2 – Margin-to-capacity versus reach for 25 Gbit/s at 1 000 MHz frequency

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BSI PD ISO/IEC TR 11801-9909:2020
$142.49