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Appendix B: EIA/TIA TSB-40A
The Category 5 Primary and Secondary Surge Protectors have been designed to conform to
stringent EIA/TIA TSB-40A standards as required for all Category 5 connecting hardware.
These standards specify capacitance and near-end crosstalk (NEXT) limits to help ensure
proper operation of
the following pages.
Table B-1. Results of TSB-40A Compliance Testing, Part 1:
NEXT Measurements for the Primary Surge Protector (SP250A)
Freq.
1-2/3-6
(MHz)
(dB)
1
>80
4
78
8
75
10
70
16
66
20
65
25
64
31.25
62
62.5
54
100
48
NEXT Measurements for the Secondary Surge Protector (SP251A)
Freq.
1-2/3-6
(MHz)
(dB)
1
>80
4
77
8
73
10
67
16
65
20
64
25
62
31.25
59
62.5
53
100
64
APPENDIX B: EIA/TIA TSB-40A Compliance
Compliance
connected equipment. Specific test results are shown in the tables on
all
Typical Near-End Crosstalk Measurements
SOURCE/VICTIM PAIRS
1-2/4-5
1-2/7-8
(dB)
>80
71.0
66.0
63.0
59.3
57.6
56.0
54.0
48.6
52.0
SOURCE/VICTIM PAIRS
1-2/4-5
1-2/7-8
(dB)
>80
74.0
63.0
67.3
69.0
63.0
61.0
61.0
59.3
52.0
3-6/4-5
(dB)
(dB)
>80
>80
>80
75.0
>80
70.0
>80
68.0
>80
64.0
>80
62.0
>80
60.0
>80
58.0
80.0
51.0
59.0
45.0
3-6/4-5
(dB)
(dB)
>80
>80
>80
73.0
>80
68.0
>80
62.0
>80
58.0
>80
57.0
75.0
56.5
77.0
54.0
77.0
49.0
69.0
45.4
3-6/7-8
4-5/7-8
(dB)
(dB)
>80
>80
73.0
77.0
77.0
66.0
74.0
69.0
80.0
72.0
>80
66.0
71.0
63.0
66.0
61.0
60.0
58.0
56.0
43.0
3-6/7-8
4-5/7-8
(dB)
(dB)
>80
>80
>80
74.0
75
69.0
68.9
66.0
68
62.0
72
61.0
64
62.4
62
57.0
54.7
50.0
51
46.0
SPEC
(dB)
>65
>65
62
60
56
54
52
50
44
40
SPEC
(dB)
>65
>65
62
60
56
54
52
50
44
40
15
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