Installation Guide for the Model SW502 and Model SW507 Ethernet Switches
Cabling Specifications
C-3
Coaxial 50
Ω
Ω
Cable
The 50
Ω
coaxial cable, together with the BNC T-connector and the 50
Ω
terminator, allow a user to
construct a 10BASE-2 network.
Table C-2. Specifications of 10BASE2 (ThinNet) RG 58 A/U or RG 58 C/U coaxial cable
Characteristic
impedance
Attenuation
(185m cable)
Transfer
impedance
DC loop
resistance
50 +/- 2
Ω
<
8.5 db @ 10 MHz
<
6.0 db @ 5 MHz
20 m
Ω
@ 1 MHz
100 m
Ω
@ 10 MHz
500 m
Ω
@ 100 MHz
50 m
Ω
/meter
The Ethernet specifications limit segments to 30 stations and specify a minimum of 0.5 m between
any two stations. For optimal configuration control and network management, it is recommended that
segments be limited to five attached stations. Ethernet specifications limit segments to 600 ft (185 m)
in length. For optimal configuration control and network management, it is recommended that
segments be limited to 100 ft (30 m).
AUI Cable
The AUI cable connects the AUI port on the Model SW502 switch to a transceiver. The Ethernet
specifications limit the cable length to 164 ft (50 m).
