Edge-Core ECS3510-28F, Руководство по установке, Страница: 47 / 72

C
HAPTER
4
| Making Network Connections
Connectivity Rules
– 47 –
4.
As a connection is made, check the Link LED on the switch corresponding to
the port to be sure that the connection is valid.
The 100BASE-FX fiber optic ports operate at 100 Mbps, full duplex. You can run
each single-mode fiber link up to a maximum of 15 kilometers from the central
office. However, note that power budget constraints must also be considered
when calculating the maximum cable length for each specific connection.
The SFP fiber optic ports operate at 1 Gbps, full duplex, with auto-negotiation of
flow control. The maximum length for fiber optic cable operating at Gigabit
speed will depend on the fiber type as listed under
"1000 Mbps Gigabit Ethernet
Collision Domain" on page 47 .
C
ONNECTIVITY
R
ULES
When adding hubs (repeaters) to your network, please follow the connectivity
rules listed in the manuals for these products. However, note that because
switches break up the path for connected devices into separate collision
domains, you should not include the switch or connected cabling in your
calculations for cascade length involving other devices.
1000BASE-T C
ABLE
R
EQUIREMENTS
All Category 5 UTP cables that are used for 100BASE-TX connections should also
work for 1000BASE-T, providing that all four wire pairs are connected. However,
it is recommended that for all critical connections, or any new cable installations,
Category 5e (enhanced Category 5) or Category 6 cable should be used. The
Category 5e and 6 specifications include test parameters that are only
recommendations for Category 5. Therefore, the first step in preparing existing
Category 5 cabling for running 1000BASE-T is a simple test of the cable
installation to be sure that it complies with the IEEE 802.3-2005 standards.
1000 M
BPS
G
IGABIT
E
THERNET
C
OLLISION
D
OMAIN
Table 5: Maximum 1000BASE-T Gigabit Ethernet Cable Length
Cable Type Maximum Cable Length Connector
Category 5, 5e, or 6 100-ohm UTP or STP 100 m (328 ft) RJ-45