NETGEAR SW502, Installation Manual

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Cabling Specifications C-1
Appendix C Cabling Specifications
This appendix provides specifications for cables used with the Model SW502 and Model 507
switches.
Cable Specifications
Category 5 twisted-pair cable must be used for 100 Mbps connections. For 10 Mbps connections,
Category 3, 4, or 5 cables can be used; however, NETGEAR highly recommends Category 5.
Category 5 cable will avoid unnecessary expenses or confusion if you upgrade to Fast Ethernet.
Table C-1. Electrical requirements of Category 3, 4, and 5 cables
Specification Category 3 Category 4 Category 5
Number of pairs Four Four Four
Impedance 100
Ω ±
15% 100
Ω ±
15% 100
Ω ±
15%
Mutual capacitance
at 1 KHz 6.6 nF
per 100 m
5.6 nF
per 100 m
5.6 nF
per 100 m
Maximum attenuation
(dB per 100 m, at 20
°
C)
at 4 MHz: 5.6
at 10 MHz: 9.8
at 16 MHz: 13.1
at 4 MHz: 4.3
at 10 MHz: 7.2
at 16 MHz: 8.9
at 16 MHz: 8.2
at 31 MHz: 11.7
at 100 MHz: 22
NEXT loss
(dB minimum) at 4 MHz: 32
at 10 MHz: 26
at 16 MHz: 23
at 4 MHz: 47
at 10 MHz: 41
at 16 MHz: 38
at 16 MHz: 44
at 31 MHz: 39
at 100 MHz: 32