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DI-206 ISDN Remote Router
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another 10Mbps Ethernet or dual-speed hub using a straight-through cable, or an end
node using a cross-wired cable.
Please refer to the following chart when deciding on the type of cable necessary for a
given connection:
DEVICE PORT
USED
DEVICE BEING
CONNECTED
PORT
TYPE
CABLE TO USE
Hub or
Normal Crossover (X)
Normal
Switch
Uplink Straight-Through (||)
Router Server (or PC) Straight-Through (||)
Hub or
Normal Straight-Through (||)
Uplink
Switch
Uplink Crossover (X)
Server (or PC) Crossover (X)
The figure below shows how to make an Ethernet connection between the router and
a network end node.
Important Notes on Ethernet Connections
Observe the following rules when connecting devices with twisted-pair Ethernet
cables:
•
For both end-node and uplink connections, use only EIA Category 3 or higher-
grade twisted-pair data cables with RJ-45 plugs. In almost all cases, only
standard straight-through cables are needed.
•
Make sure no cable is more than 100 meters (328 feet) long.
•
When uplinking two hubs together with a straight-through cable, use an
uplink-type jack at one end, and an end-node-type jack at the other.
•
If uplinking more than two hubs together, observe the 5-4-3 rule: no signal, in
order to go from one end node to another, must ever pass through more than
five twisted-pair cables, four repeaters (that is, hubs), and three uplink cables.