What is the Maximum Link Distance for 1000Base-T?

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Article ID: 4875 

Standards
802.3ab
1000Base-T 

Related to
Ethernet
Gigabit
10/100/1000 

Goals
Maximum link distance for 1000Base-T 

Symptoms
No link
Gigabit link cannot be established 

Solution
The maximum link distance for a full duplex 1000Base-T Gigabit Ethernet link utilizing four pairs of Category 5 UTP cabling is 100 meters. 

This distance is stated in the 802.3ab Ratification press release

Unless all four pairs are utilized for 10/100/1000 port attachment, the peer ports may or may not be able to attain link; and if they attain link, they will likely not be able to reliably pass traffic. This is true of both straight-through and crossover pinouts, at any line speed. 

See also: 4593.
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Posted 5 years ago

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