SP-3-4426-AD10-B
To be published as ANSI/TIA/EIA-568-B.2-10

1
NOTICE OF DISCLAIMER AND LIMITATION OF LIABILITY 2

3

4
The document to which this Notice is affixed (the “Document”) has been prepared by one or more
5
Engineering Committees or Formulating Groups of the Telecommunications Industry Association
6
(“TIA”). TIA is not the author of the Document contents, but publishes and claims copyright to the
7
Document pursuant to licenses and permission granted by the authors of the contents.
8
TIA Engineering Committees and Formulating Groups are expected to conduct their affairs in
9
accordance with the TIA Engineering Manual (“Manual”), the current and predecessor versions of
10
which are available at TIA’s
11
function is to administer the process, but not the content, of document preparation in accordance
12
with the Manual and, when appropriate, the policies and procedures of the American National
13
Standards Institute (“ANSI”). TIA does not evaluate, test, verify or investigate the information,
14
accuracy, soundness, or credibility of the contents of the Document. In publishing the Document,
15

reasonable or non-discriminatory. TIA does not warrant or represent that procedures or practices
31
suggested or provided in the Manual have been complied with as respects the Document or its
32
contents.
33
TIA does not enforce or monitor compliance with the contents of the Document. TIA does not
34
certify, inspect, test or otherwise investigate products, designs or services or any claims of
35
compliance with the contents of the Document.
36
ALL WARRANTIES, EXPRESS OR IMPLIED, ARE DISCLAIMED, INCLUDING WITHOUT 37
LIMITATION, ANY AND ALL WARRANTIES CONCERNING THE ACCURACY OF THE 38
CONTENTS, ITS FITNESS OR APPROPRIATENESS FOR A PARTICULAR PURPOSE OR 39
USE, ITS MERCHANTABILITY AND ITS NON-INFRINGEMENT OF ANY THIRD PARTY’S 40
INTELLECTUAL PROPERTY RIGHTS. TIA EXPRESSLY DISCLAIMS ANY AND ALL 41
RESPONSIBILITIES FOR THE ACCURACY OF THE CONTENTS AND MAKES NO 42
REPRESENTATIONS OR WARRANTIES REGARDING THE CONTENT’S COMPLIANCE WITH 43
ANY APPLICABLE STATUTE, RULE OR REGULATION, OR THE SAFETY OR HEALTH 44
EFFECTS OF THE CONTENTS OR ANY PRODUCT OR SERVICE REFERRED TO IN THE 45
DOCUMENT OR PRODUCED OR RENDERED TO COMPLY WITH THE CONTENTS. 46
47
SP-3-4426-AD10-B
To be published as ANSI/TIA/EIA-568-B.2-10
TIA SHALL NOT BE LIABLE FOR ANY AND ALL DAMAGES, DIRECT OR INDIRECT, ARISING FROM 1
OR RELATING TO ANY USE OF THE CONTENTS CONTAINED HEREIN, INCLUDING WITHOUT 2
LIMITATION ANY AND ALL INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES 3
(INCLUDING DAMAGES FOR LOSS OF BUSINESS, LOSS OF PROFITS, LITIGATION, OR THE LIKE), 4
WHETHER BASED UPON BREACH OF CONTRACT, BREACH OF WARRANTY, TORT (INCLUDING 5

8
3

NORMATIVE REFERENCES .................................................................................................2

9
4

DEFINITIONS, ACRONYMS & ABBREVIATIONS .................................................................2

10
4.1

Definitions ......................................................................................................................... 2

11
4.2

Acronyms and abbreviations............................................................................................. 3

12
5

TEST CONFIGURATIONS......................................................................................................4

13
6

CABLING AND COMPONENTS .............................................................................................5


20
7.1.2

Connecting hardware insertion loss .......................................................................... 7

21
7.1.3

Cabling insertion loss................................................................................................. 8

22
7.1.3.1

Channel insertion loss ........................................................................................ 8

23
7.1.3.2

Permanent link insertion loss ............................................................................. 9

24
7.2

NEXT loss and PSNEXT loss ......................................................................................... 10

25
7.2.1

NEXT loss ................................................................................................................ 10


32
7.2.2.1

Cable PSNEXT loss ......................................................................................... 16

33
7.2.2.2

Channel PSNEXT loss ..................................................................................... 17

34
7.2.2.3

Permanent link PSNEXT loss........................................................................... 18

35
7.3

ELFEXT, FEXT loss, and PSELFEXT ............................................................................ 19

36
7.3.1

ELFEXT ................................................................................................................... 19

37
7.3.1.1

Cable ELFEXT.................................................................................................. 19


44
7.3.3.2

Channel PSELFEXT......................................................................................... 24

45
7.3.3.3

Permanent link PSELFEXT .............................................................................. 25

46
7.4

Return loss ...................................................................................................................... 26

47
7.4.1

Horizontal cable return loss ..................................................................................... 26

48
7.4.2

Cord cable return loss.............................................................................................. 27

49
04/06/06 SP-3-4426-AD10-B, draft 4.0 (to be published as ANSI/TIA/EIA-568-B.2-10)
ii
7.4.3


Cable propagation delay.......................................................................................... 32

7
7.5.2

Cabling propagation delay ....................................................................................... 33

8
7.5.3

Cable propagation delay skew ................................................................................ 33

9
7.5.4

Cabling propagation delay skew.............................................................................. 33

10
7.6

Balance ........................................................................................................................... 33

11
7.6.1

Transverse conversion loss (TCL)........................................................................... 33

12
7.6.1.1


Channel ELTCTL.............................................................................................. 39

19
7.7

DC resistance unbalance (TBD) ..................................................................................... 39

20
7.7.1

Cable DC resistance unbalance .............................................................................. 39

21
7.7.2

Connecting hardware DC resistance unbalance ..................................................... 39

22
7.7.3

Channel DC resistance unbalance .......................................................................... 39

23
7.8

ANEXT loss and PSANEXT loss .................................................................................... 40

24
7.8.1


AFEXT loss, AELFEXT, and PSAACRF ....................................................................... 45

31
7.10.1

Cable PSAACRF...................................................................................................... 46

32
7.10.2

Connecting hardware PSAFEXT loss...................................................................... 47

33
7.10.3

Channel PSAACRF ................................................................................................. 48

34
7.10.4

Permanent link PSAACRF....................................................................................... 49

35
7.11

Average AELFEXT and PSAACRF............................................................................... 50

36
7.11.1



Procedure........................................................................................................................ 53

44
B.4

Results ............................................................................................................................ 53

45
Annex C Connecting hardware ANEXT loss and AFEXT loss reference test procedure 46
(normative)....................................................................................................................................54

47
C.1

Purpose........................................................................................................................... 54

48
SP-3-4426-AD10-B, draft 4.0 (to be published as ANSI/TIA/EIA-568-B.2-10) 04/06/06

iii
C.2

Measurement outline ...................................................................................................... 54

1
C.3

Network analyzer and test fixture settings ...................................................................... 54


D.2

Termination of pairs ........................................................................................................ 58

10
D.3

Channel construction ...................................................................................................... 58

11
D.4

Determining number of disturbing components .............................................................. 59

12
D.5

Channel ANEXT loss and AFEXT loss measurements and computations .................... 60

13
Annex E Field measurement method for alien crosstalk (normative) ..........................................61

14
E.1

General ........................................................................................................................... 61

15
E.2


Applying the correction for the measurement floor (optional).................................. 63

22
E.6

Power sum alien crosstalk test strategy ......................................................................... 64

23
E.6.1

General guidelines for power sum alien crosstalk testing ....................................... 64

24
Annex F Modular plug cord test procedure (normative)...............................................................65

25
F.1

General ........................................................................................................................... 65

26
F.2

Network analyzer test configuration................................................................................ 65

27
F.3

Augmented category 6 modular plug cord test procedure.............................................. 66



Test setup and apparatus ............................................................................................... 68

35
G.2.1

Test balun characteristics ........................................................................................ 68

36
G.2.2

Impedance matching terminations........................................................................... 68

37
G.2.2.1

Test fixture common mode impedance match ................................................. 68

38
G.2.2.2

Balun terminations............................................................................................ 68

39
G.2.2.3

Resistor terminations........................................................................................ 68

40
G.2.2.4

4
G.3.4

Procedure for terminating a test plug to direct measurement test head ................. 70

5
G.3.5

Augmented category 6 modular test plug NEXT loss requirements ....................... 71

6
G.3.6

Augmented category 6 NEXT loss measurement reproducibility between labs ..... 73

7
G.4

Augmented category 6 test plug FEXT loss ................................................................... 74

8
G.4.1

Augmented category 6 FEXT loss measurement reproducibility between labs...... 74

9
G.5

Test plug return loss testing............................................................................................ 75



Additional components for connection to a network analyzer ........................................ 77

17
H.3

Test fixture calibration procedure.................................................................................... 77

18
H.3.1

Open short and load calibration............................................................................... 77

19
H.3.2

Through calibration .................................................................................................. 78

20
H.4

Test lead return loss measurement using pyramid impedance management fixture..... 78

21
H.5

Direct measurement fixture detailed construction .......................................................... 79

22
H.6


29
I.2

Measurement performance requirements....................................................................... 84

30
I.3

Optional comparison method using the full frequency responses.................................. 86

31
Annex J Augmented category 6 ScTP related specifications (normative) ...................................88

32
J.1

General ........................................................................................................................... 88

33
J.2

Insertion loss ................................................................................................................... 88

34
J.2.1

Cable insertion loss ................................................................................................. 88

35

Figure A.1 - Measurement configurations for test balun qualification ........................................... 52

4
Figure B.1 - 6-around-1 cable test configuration........................................................................... 53

5
Figure C.1 - Connecting hardware ANEXT loss measurement setup .......................................... 55

6
Figure D.1 - Example of a “6-around-1” cable arrangement in a channel .................................... 59

7
Figure D.2 - Connector arrangement from an 8-port panel, in which 5 of the connectors are 8
significant disturbers............................................................................................................... 59

9
Figure F.1 - Network analyzer configuration ................................................................................. 65

10
Figure G.1 - Test plug/direct measurement fixture with impedance controlled test fixture ........... 70

11
Figure H.1 - Test head assembly THI3KIT with baluns attached.................................................. 76

12
Figure H.2 - Test head assembly showing foil tape applied to baluns and shielding (optional) 13
between baluns ...................................................................................................................... 77

14
Figure H.3 - Load calibration adapter arrangement ...................................................................... 77

Table 1 - Matrix of backward compatible mated component performance ..................................... 1

27
Table 2 - Augmented category 6 cable insertion loss ..................................................................... 6

28
Table 3 – Augmented category 6 connecting hardware insertion loss ........................................... 7

29
Table 4 – Augmented category 6 channel insertion loss ................................................................ 8

30
Table 5 – Augmented category 6 permanent link insertion loss ..................................................... 9

31
Table 6 - Augmented category 6 cable NEXT loss ....................................................................... 10

32
Table 7 – Augmented category 6 connecting hardware NEXT loss ............................................. 11

33
Table 8 – Augmented category 6 connecting hardware NEXT loss ............................................. 11

34
Table 9 - Example augmented category 6 work area, equipment, and patch cord NEXT loss limits35
................................................................................................................................................ 13

36
Table 10 – Augmented category 6 channel NEXT loss ................................................................ 14


47
Table 21 – Augmented category 6 permanent link ELFEXT......................................................... 21

48
Table 22 – Augmented category 6 connecting hardware FEXT loss............................................ 22

49
Table 23 - Augmented category 6 cable PSELFEXT.................................................................... 23

50
Table 24 – Augmented category 6 channel PSELFEXT ............................................................... 24

51
Table 25 – Augmented category 6 permanent link PSELFEXT.................................................... 25

52
Table 26 - Augmented category 6 horizontal cable return loss..................................................... 26

53
Table 27 - Augmented category 6 horizontal cable return loss..................................................... 26

54
04/06/06 SP-3-4426-AD10-B, draft 4.0 (to be published as ANSI/TIA/EIA-568-B.2-10)
vi
Table 28 - Augmented category 6 cord cable return loss ............................................................. 27

1
Table 29 - Augmented category 6 cord cable return loss ............................................................. 27

2

Table 40 – Augmented category 6 channel TCL........................................................................... 36

13
Table 41 – Augmented category 6 channel TCL........................................................................... 36

14
Table 42 – Augmented category 6 cable ELTCTL ........................................................................ 37

15
Table 43 – Augmented category 6 connecting hardware TCTL ................................................... 38

16
Table 44 – Augmented category 6 channel ELTCTL .................................................................... 39

17
Table 45 – Augmented category 6 cable PSANEXT loss ............................................................. 40

18
Table 46 – Augmented category 6 connecting hardware PSANEXT loss .................................... 41

19
Table 47 – Augmented category 6 channel PSANEXT loss ......................................................... 42

20
Table 48 – Augmented category 6 channel PSANEXT loss ......................................................... 42

21
Table 49 – Augmented category 6 permanent link PSANEXT loss .............................................. 43

22

Table G.1 – Augmented category 6 connecting hardware NEXT loss for high and low plugs 45-3633
................................................................................................................................................ 70

34
Table G.2 – Augmented category 6 direct measurement test plug NEXT loss limits ................... 71

35
Table G.3 – Augmented category 6 direct measurement test plug NEXT loss range ................. 72

36
Table G.4 – Augmented category 6 FEXT loss ranges for category 6 NEXT loss test plugs....... 73

37
Table G.5 – Test plug NEXT loss measurement reproducibility between laboratories ................ 73

38
Table G.6 – Augmented category 6 test plug FEXT loss ranges.................................................. 74

39
Table G.7 – Test plug FEXT loss measurement reproducibility between laboratories ................. 74

40
Table H.1 - Direct measurement fixture residual NEXT loss and return loss ............................... 80

41
Table I.1 – Level IIIe field tester accuracy performance ............................................................... 84

42
Table I.2 - Explanation of notes in table I.1 ...................................................................................85


support 10GBASE-T. The project was assigned to TR-42.7 under Engineering Committee TR-42. 16
The TR-42.7 Sub-Committee cooperated with several groups related to this activity. 17
18
TIA standards documents are developed within the Technical Committees of the TIA and the 19
standards coordinating committees of the TIA standards board. Members of the committees 20
serve voluntarily and without commission. The companies that they represent are not 21
necessarily members of the TIA. The standards developed within the TIA represent a consensus 22
of the broad expertise on the subject. This expertise comes from within the TIA as well as those 23
outside of the TIA that have an expressed interest. The viewpoint expressed at the time that this 24
standard was approved was from the contributors’ experience and the state of the art at that time. 25
Users are encouraged to verify that they have the latest revision of the standard. 26
27
This standard has been prepared by the TR-42.7 Subcommittee and approved by the 28
Engineering Committee TR-42. 29
30
There are 10 annexes in this Standard. Annexes A, B, C, D, E, F, G, H, I, and J, are normative 31
and considered a mandatory part of this Standard. Annex K is informative and not considered a 32
part of this Standard. 33
34
SP-3-4426-AD10-B, draft 4.0 (to be published as TIA/EIA-568-B.2-10) 04/06/06

1
1 INTRODUCTION 1
This Standard specifies requirements and recommendations for 100 Ω 4-pair augmented 2
category 6 cabling, cables, cords, and connecting hardware to support the operation of high-speed 3
applications, such as IEEE 802.3 10GBASE-T, over up to100 meters of structured balanced 4
twisted-pair copper cabling.

In addition, augmented category 6 cabling, cables, cords, and 5
connecting hardware shall meet or exceed all the requirements of ANSI/TIA/EIA-568-B.1, 6


Augmented
Category 6
Category 3 Category 5 Category 5e Category 6 Augmented
Category 6
1) Category 3 plug performance requirements are assumed to be less restrictive than
category 5e.
23
Testing according to the procedures of this standard is intended to ensure backward compatibility 24
with category 6. 25
2 PURPOSE AND SCOPE 26
To develop cabling and component specifications and test procedures to support the operation of 27
high-speed applications, such as IEEE 802.3an 10GBASE-T, over up to100 meters of structured 28
balanced twisted-pair copper cabling. This Standard specifies requirements and recommendations 29
for 100 Ω 4-pair augmented category 6 cabling, cables, cords, and connecting hardware up to 30
500 MHz. This Standard includes extending the frequency range and adding requirements 31
(i.e. alien crosstalk) to those specified in ANSI/TIA/EIA-568-B.2 and its addenda. This cabling shall 32
be known as augmented category 6. Augmented category 6 may be abbreviated as category 6A. 33
34
Modular Plug &
Cord Performance
04/06/06 SP-3-4426-AD10-B, draft 4.0 (to be published asTIA/EIA-568-B.2-10)
2
3 NORMATIVE REFERENCES 1
The following standards contain requirements that, through reference in this text, constitute 2
provisions of this Standard. At the time of publication, the editions indicated were valid. All 3
standards are subject to revision; parties to agreements based on this Standard are encouraged to 4
investigate the possibility of applying the most recent editions of the standards indicated. ANSI and 5
TIA maintain registers of currently valid national standards published by them. 6
ANSI/ICEA S-80-576, Communications Wire and Cable for Wiring Premises, 1994 7

ratio, far end (PSACR-F) respectively. 38
alien crosstalk: Signal coupling from disturbing pairs into a disturbed pair of a neighboring channel 39
or part thereof. 40
alien far-end crosstalk loss: Signal coupling from near-end disturbing channel pairs into a 41
disturbed pair of a neighboring channel or part thereof, measured at the far-end. 42
alien near-end crosstalk loss: Signal coupling from near-end disturbing channel pairs into a 43
disturbed pair of a neighboring channel or part thereof, measured at the near-end. 44
average ANEXT loss: The average signal coupling from near-end disturbing channel pairs into a 45
disturbed pair of a neighboring channel or part thereof, measured at the near-end. 46
SP-3-4426-AD10-B, draft 4.0 (to be published as TIA/EIA-568-B.2-10) 04/06/06

3
average PSANEXT loss: The calculated average of the individual PSANEXT loss values for all 1
four pairs in the disturbed channel 2
cord cable: cable used to construct patch, work area, and equipment cords. 3
power sum attenuation to alien crosstalk ratio far-end: A computation of signal coupling from 4
multiple pairs of disturbing channels, to a disturbed pair in another channel, measured at the far-5
end, and relative to the received signal level in the disturbed pair at the far-end. 6
power sum alien far-end crosstalk loss: A computation of signal coupling from multiple near-end 7
disturbing channel pairs into a disturbed pair of a neighboring channel or part thereof, measured at 8
the far-end. 9
power sum alien near-end crosstalk loss: A computation of signal coupling from multiple near-10
end disturbing channel pairs into a disturbed pair of a neighboring channel or part thereof, 11
measured at the near-end. 12
power sum far-end crosstalk loss: A computation of the unwanted signal coupling from multiple 13
transmitters at the near-end into a pair measured at the far-end. 14
4.2 Acronyms and abbreviations 15
AELFEXT Alien equal level far-end crosstalk 16
AFEXT Alien far-end crosstalk 17
ANEXT Alien near-end crosstalk 18

22
23
24
25
26
27
28
Figure 1 - Supplemental schematic representation of a channel test configuration 29
30
Legend

Cables and cords Connecting hardware
Work area cord ..................................A Telecommunications outlet/
Optional consolidation point cabling..B connector ....................................WA
Horizontal cabling ............................. C Optional consolidation
Patch cord or jumper cable .............. D point connector ............................CP
Telecommunications room Horizontal cross-connect or
equipment cord ...........................E interconnect .......................... C1, C2

Maximum length
B + C.....................................90 m (295 ft)
A + D + E .............................10 m (32.8 ft)

Test
equipment
A B C
D
E

Test

Figure 2 - Supplemental schematic representation of a permanent link test configuration 24
6 CABLING AND COMPONENTS 25
The following category of twisted-pair cabling and components is recognized in addition to those 26
identified in ANSI/TIA/EIA-568-B.2 and its addenda: 27
28
Augmented category 6: This designation applies to 100 Ω cabling and components whose 29
transmission characteristics are specified up to 500 MHz. 30
6.1 Recognized cable 31
Augmented category 6 cable, of all types including horizontal, cord, backbone, and bundled and 32
hybrid cables, shall conform to the respective cable types’ requirements given in clause 4 of 33
ANSI/TIA/EIA-568-B.2 and its addenda and clause 7 of this Standard. 34
35
Additional requirements for 100 Ω augmented category 6 ScTP cables are located in annex K of 36
ANSI/TIA/EIA-568-B.2 and annex J of this Standard.

37
38
Bundling lower category cables with augmented category 6 cables may adversely affect alien 39
crosstalk performance.

40
6.2 Recognized connecting hardware 41
Augmented category 6 connecting hardware shall conform to the respective connecting hardware 42
requirements given in clause 5 of ANSI/TIA/EIA-568-B.2 and its addenda and clause 7 of this 43
Standard. 44
6.3 Cords 45
Augmented category 6 cords shall conform to the respective cord requirements given in clause 6 of 46
ANSI/TIA-568-B.2 and its addenda and clause 7 of this Standard. 47
48
Legend

20 °C using the correction factors specified in this clause. The values in table 2 are provided for 7
information only. 8

9
f
ffossInsertionL
mcable
2.0
01.08.1
100,
++≤
dB (1) 10
Augmented category 6 horizontal cable insertion loss shall also be verified at a temperature of 11
40 ± 3 °C and 60 ± 3 °C and shall meet the requirements of equation (1) after adjusting for 12
temperature. The maximum insertion loss for horizontal UTP cables shall be adjusted at elevated 13
temperatures using a factor of 0.4 % increase per °C from 20 °C to 40 °C and 0.6% increase per °C 14
for temperatures from 40 °C to 60 °C. The maximum insertion loss for horizontal ScTP cables shall 15
be adjusted at elevated temperatures using a factor of 0.2% increase per °C from 20 °C to 60 °C. 16
17
Table 2 - Augmented category 6 cable insertion loss 18
19
Frequency
(MHz)
Insertion loss
(dB)
1.00 2.0
4.00 3.7
8.00 5.2
10.00 5.9
16.00 7.4

7
7.1.2 Connecting hardware insertion loss 1
For all frequencies from 1 MHz to 500 MHz, augmented category 6 connecting hardware insertion 2
loss shall meet the values determined using equation (3). The values in table 3 are provided for 3
information only. Calculations that result in insertion loss values less than 0.1 dB shall revert to a 4
requirement of 0.1 dB maximum. 5
6
fossInsertionL
conn
02.0≤
dB (3) 7
8
Table 3 – Augmented category 6 connecting hardware insertion loss 9
10
Frequency
(MHz)
Insertion loss
(dB)
1.00 0.02
4.00 0.04
8.00 0.06
10.00 0.06
16.00 0.08
20.00 0.09
25.00 0.10
31.25 0.11
62.50 0.11
100.00 0.16
200.00 0.20
250.00 0.28

01.08.1(03.0
100,
f
ffILD
mchannel
++≤
(5) 15
Table 4 – Augmented category 6 channel insertion loss 16
17
Frequency
(MHz)
Insertion loss
(dB)
1.00 2.2
4.00 4.1
8.00 5.7
10.00 6.4
16.00 8.1
20.00 9.1
25.00 10.2
31.25 11.4
62.50 16.3
100.00 20.8
200.00 30.0
250.00 33.8
300.00 37.3
400.00 43.6
500.00 49.3
18
19

where: 10

11
mcablecable
ossInsertionLossInsertionL
100,
9.0 ⋅=
dB, and (7) 12

13
5.1
_
00015.0 fILD
linkperm
=
dB (TBD – Editor: See TBD in equation (9) also) (8) 14
15
16
17
)(00015.0
18.0
009.068.1
5.1
_
TBDf
f
ffossInsertionL
linkperm
+++≤
dB (9) 18

29
30
04/06/06 SP-3-4426-AD10-B, draft 4.0 (to be published asTIA/EIA-568-B.2-10)
10
7.2 NEXT loss and PSNEXT loss 1
NEXT loss is a measure of the unwanted signal coupling from a transmitter at the near-end into 2
neighboring pairs measured at the near-end. NEXT loss is expressed in dB relative to the transmit 3
signal level. NEXT loss shall be measured for all pair combinations of cables and cabling in 4
accordance with annex C of ANSI/TIA/EIA-568-B.2 and the ASTM D 4566 NEXT loss 5
measurement procedure. In addition, the test fixture shall provide for consistent common and 6
differential mode impedance matching for the unjacketed twisted-pairs between the cable jacket 7
and the balun terminations. Connecting hardware NEXT loss shall be measured for all pair 8
combinations in accordance with annex G. Modular plug cord NEXT loss shall be measured for all 9
pair combinations in accordance with annex . In addition, since each duplex channel can be 10
disturbed by more than one duplex channel, power sum near-end crosstalk (PSNEXT) loss is also 11
specified for cabling and cables. 12
7.2.1 NEXT loss 13
7.2.1.1 Cable NEXT loss

14
For all frequencies from 0.772 MHz to 500 MHz, augmented category 6 cable NEXT loss, for a 15
length of 100 m (328 ft) or longer, shall meet the values determined using equation (10). The 16
values in table 6 are provided for information only. 17
18
)100/log(153.44
fNEXT
cable
−≥
dB (10) 19
20

For all frequencies from 1 MHz to 500 MHz, augmented category 6 connecting hardware NEXT 2
loss shall meet the values determined using the equations specified in table 7 when mated to the 3
range of test plugs specified in clause G.3. Calculations that result in NEXT loss values greater 4
than 75 dB shall revert to a requirement of 75 dB minimum. The values in table 8 are provided for 5
information only. 6
7
Table 7 – Augmented category 6 connecting hardware NEXT loss 8
9
Frequency
(MHz)
NEXT loss
(dB)
1 ≤ f ≤250
250 < f ≤ 500
54-20log(
f/
100)
46.04-40log(
f/
250)
10
Table 8 – Augmented category 6 connecting hardware NEXT loss 11
12
Frequency
(MHz)
NEXT loss
(dB)
1.00 75.0
4.00 75.0
8.00 75.0

NEXT −












⋅+−
+
−
−=
10
2
10
10
10log10
_
(11) 6
where: 7
( )( )





100,
hCableLengt
mcable
IL
IL
DeRating
cable
IL ⋅⋅=
(13) 10








⋅−
−−=
cable
IL
e
mcable
NEXT
cable
NEXT
46.0
1log10
100,
(14) 11

NEXT
is the cable NEXT loss computed from the NEXT loss requirements for 100 m cable, 1
the insertion loss requirements for 100 m patch cable, the length correction formula in ASTM D 2
4566, and 3

4
mcable
NEXT
100,
is the NEXT loss test limit for 100 m cable as specified in equation (10). 5

6
RFEXT
is the allowance for reflected FEXT loss as described in equation (15). 7
8
RFEXT
= 0.5 dB (15) 9

10
11
The low frequency measurement plateau for connector insertion loss and connector NEXT loss do 12
not apply to the calculation of cord limits. Calculations that result in NEXT loss greater than 65 dB 13
shall revert to a limit of 65 dB. The values in table 9 are provided for information only. 14
Table 9 - Example augmented category 6 work area, equipment, and patch cord NEXT loss 15
limits 16
Frequency
(MHz)
1 m cord limit
(dB)
2 m cord limit

provided for information only. 5
6
Table 10 – Augmented category 6 channel NEXT loss
7
Frequency
(MHz)
NEXT loss
(dB) 1 ≤
f
< 330 330 ≤
f
≤ 500
)
20
))100/log(2054(
102
20
))100/log(153.44(
10log(20
ff
channel
NEXT
−−
⋅+

33.1
31.7
400.00 28.7
500.00 26.1
12
13
SP-3-4426-AD10-B, draft 4.0 (to be published as TIA/EIA-568-B.2-10) 04/06/06

15
7.2.1.5 Permanent link NEXT loss 1
For all frequencies from 1 MHz to 500 MHz, augmented category 6 permanent link NEXT loss shall 2
meet the values determined using the equations in table 12. Calculations that result in NEXT loss 3
values greater than 65 dB shall revert to a requirement of 65 dB minimum. The values in table 13 4
are provided for information only. 5
Table 12 – Augmented category 6 permanent link NEXT loss
6
Frequency
(MHz)
NEXT loss
(dB) 1 ≤
f
< 300 300 ≤
f
≤ 500

NEXT loss
(dB)
1.00 65.0
4.00 64.1
8.00 59.4
10.00 57.8
16.00 54.6
20.00 53.1
25.00 51.5
31.25 50.0
62.50 45.1
100.00 41.8
200.00 36.9
250.00 35.3
300.00 34.0
400.00 29.9
500.00 26.7
11
12
04/06/06 SP-3-4426-AD10-B, draft 4.0 (to be published asTIA/EIA-568-B.2-10)
16
7.2.2 PSNEXT loss 1
Power sum near-end crosstalk loss takes into account the combined crosstalk (statistical) on a 2
receive pair from all near-end disturbers operating simultaneously. The power sum near-end 3
crosstalk (PSNEXT) loss is calculated in accordance with ASTM D 4566 as a power sum on a 4
selected pair from all other pairs as shown in equation (16) for the case of 4-pair cable. 5
6
)101010log(10
10
3

23
)100/log(153.42 fPSNEXT
cable
−≥
dB (17) 24
Table 14 - Augmented category 6 cable PSNEXT loss 25
26
Frequency
(MHz)
PSNEXT loss
(dB)
0.150 84.7
0.772 74.0
1.00 72.3
4.00 63.3
8.00 58.8
10.00 57.3
16.00 54.2
20.00 52.8
25.00 51.3
31.25 49.9
62.50 45.4
100.00 42.3
200.00 37.8
250.00 36.3
300.00 35.1
400.00 33.3
500.00 31.8
27
NOTE – The augmented category 6 cable PSNEXT loss value at 0.150 MHz is for 28