Category 5e copper twisted pair (Cat5e) / BS EN 50173 Class D
Throughout this document we have referred to Cat5e and Cat6 cabling because these are the more recognised terms. The equivalent British Standards are BS EN 50173 Class D and Class E respectively.
Pros: Less expensive than Cat6. Can cope with a 1Gbps data rate. Able to carry Power over Ethernet with no complications. Compatible with 802.3ab.
Cons: Maximum 100m run of cable without a repeater (maximum of two repeaters).
Category 6 copper twisted pair (Cat6) / BS EN 50173 Class E
Pros: It can handle higher frequencies than Cat5e and has superior transmission qualities but, in practice, will not support any Ethernet standard or data rate not supported by Cat5e.
Cons: More expensive than Cat5e. Maximum 90m run of cable plus 10m for patch cords. Because of thickness of cable, there are limits to how tightly it can be routed in bends that might cause routing issues.
The network shall be cabled with fibre optic cable or Cat5e or Cat6 copper cabling.
Installed cable shall have the ability to support data rates of up to 1Gbps.
Where fibre is used for longer spans, over 550 m, it should be single-mode.
Where single mode fibre is used it should be OS1, 8.3/125 micron fibre.
Where multimode fibre is used it should be OM3, 50/125 micron fibre.
Cat3 shall be replaced with Cat5e or Cat6, and fibre optic cable where required.
Cat5 should be replaced with Cat5e or Cat6, and fibre optic cable where required.