User guide

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2-6
Hardware Description
Writer:
Chris Seiter
Project:
Hardware Description
Comments:
File Name:
1009B_2.DOC
Last Saved On:
6/26/97 2:18 PM
Back Panel
This section describes the hub’s back panel components.
Figure 2-4
. 1009B Hub Back Panel
Port Connections
BNC (10Base2) Connector
The 1009B hub has a built-in BNC transceiver for a connection using thin
coaxial cable. The BNC port can link up to 30 hubs on a thin coaxial cable
segment. The thin coaxial cable that links the BNC ports can extend up to 185
meters and have computers or other Ethernet devices attached to it. When
connecting two hubs via BNC ports, there should be at least 0.5 meters (about
two feet) of coaxial cable between the two BNC ports. If the hub is at the end of
an Ethernet cable, plug and lock the 50-ohm (Ω) terminators to the T-type
connector on the BNC port.
NOTE
: Terminate an open end of any T-type connector that is plugged into a BNC
port with a 50-ohm (
Ω
) terminator. In particular, when a hub using the BNC port
connection is at the end of an Ethernet segment, terminate the open end of the
T-type connector with a 50-ohm (
Ω
) terminator. Also, if the BNC port is not used,
plug a T-type connector to it and terminate both ends with a 50-ohm (
Ω
)
terminator.
RJ-45 Ports
The hub has eight RJ-45 MDI-X station ports. Using straight-through twisted-
pair cable, connect your workstation (via the network interface card’s port) to
any available station port.