Specifications

10BASE2 Ethernet Network Design
7-8 Ethernet Network Design
10BASE2 Ethernet Network Design
Single Segment 10BASE2 Ethernet Network
10BASE2 is the IEEE specification for Ethernet running on RG58 A/U
coaxial cable. 10BASE2 coaxial cable is more flexible and less expensive
than 10BASE5 coaxial cable while still maintaining the required 50 ohm
nominal impedance. The maximum length of a 10BASE2 cable segment is
185 m. The reduced distance is due to the higher loss characteristics of the
RG58 A/U compared with 10BASE5 coaxial cable. Only 30 taps are
allowed on a 10BASE2 segment and the cable is connected using BNC
connectors and terminated using 50 ohm BNC terminators.
Tapping into a 10BASE2 cable is accomplished by cutting the cable and
attaching a BNC T-connector (see Figure 7-8). One end of the T-connector
is either attached to the network interface card in the workstation or to a
wall plate and the other two ends are attached to the coaxial cable
backbone. An AUI cable is used to go from the wall plate to the device or
workstation. The minimum spacing between T-connectors or splices is
0.5 m.
Figure 7-8. Typical BNC T-Connector
The characteristics and test requirements of 10BASE2 cables are
presented in the
Cabletron Cabling Guide .
NOTE
BNC T-Connector
1913-25