GarrettCom 14E User Manual
Page 40
Magnum14E Media Converters Installation and User Guide (10/02)
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3.4.3
Segment Distances, Half-duplex mode
Fast Ethernet shared bandwidth devices operate with multiple nodes in a traffic
domain. When a node attempts to send a packet, it may hit another packet passing by, i.e., a
collision may occur. This is normal and does not cause a problem because the Ethernet
protocol provides for this situation and requires that the sender wait and try again. When
installing the Magnum 14E in a half-duplex segment, it is important to consider the collision
domain of the segment, including the 14E itself, repeaters and hubs present, and the lengths of
both of the attached media types.
3.4.4
Collision Domain (PDV Calculations)
A collision domain is defined in the IEEE 802.3u standard as a cluster of network
devices that, regardless of topology, must be less than 512 BT (Bit Times) of signal delay