Black Box LH1500
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Media Converters Installation and User Guide (08/05)
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Collision Domain
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 (PDV or Path Delay Value) in diameter between any two nodes. Nodes in a
collision domain are connected by means of a repeater or repeaters such that no bridging
or switching devices are present between any two nodes in the cluster. A Black Box
LH1500
A
has a PDV of about eighty Bit Times (80 BT), and this value must be included
in the overall collision domain diameter PDV calculations as applicable for the
placement of the LH1500 in the topology of the collision domain.
Collision Domain Diameter
The Collision Domain Diameter is the length of the longest path between any
two devices in a single collision domain. Regardless of the actual network topology, the
