3Com 5101T-FB-FC Marine Radio User Manual


 
Page 32
cables occurs in the shielding and grounding of
the individual signal and power pairs. IEEE 802.3
and Ethernet V2.0 specify a requirement for
signal isolation due to AC-coupling of the AUI
connection. The V1.0 standard does not contain
this requirement.
The three standards specify different techniques
for shielding and grounding.
EEE 802.3
All shields of the individual signal and power
pairs are connected to pin 4. The overall AUI
cable shield is connected to the AUI connector
shell to provide a cable ground. Pin 1 is not used.
Version 2.0
All shields are connected to pin 1 and the AUI
connector shell. Pin 4 is not used. Most Ethernet
cables are built this way.
Version 1.0