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COMNET III

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<strong>COMNET</strong> <strong>III</strong> Reports and Statistics<br />

1.7 Aloha, CMSA, CMSA/CA, CMSA/CD and C.A.N. Link Monitors<br />

The contention channel is the primary channel for data communications on the link.<br />

Statistics for the control channel transmission delay are only gathered when the control<br />

channel has been enabled on the Link Specifics tab, and a Control Node has been specified.<br />

The control channel allows the non control nodes attached to the link to respond to control<br />

node messages along a contention free channel.<br />

Contention Channel Utilization<br />

Control Channel Utilization<br />

Measure the percent of capacity at which the contention channel of the<br />

link is utilized.<br />

Measure the percent of capacity at which the control channel of the link<br />

is utilized.<br />

Contention Channel Transmission Delay<br />

Control Channel Transmission Delay<br />

Deferral Delay<br />

Deferral Queue Size<br />

Multiple Collision Episodes<br />

Collisions Per Collided Frame<br />

Contention Channel Frame Size<br />

Control Channel Frame Size<br />

Measure the link layer frame delay of the contention channel.<br />

Measure the link layer frame delay of the control channel.<br />

Measure the delay time of a link layer frame to transmit when the frame<br />

detects that the link is busy and "defers" transmission until the link is<br />

idle. This measure only applies to the contention channel.<br />

Measure the queue size of link layer frames that have deferred<br />

transmission until a busy link becomes idle. This measure only applies<br />

to the contention channel.<br />

Measure the number of times that two or more link layer frames collided.<br />

Measure the number of link layer frames that collided per collision episode.<br />

Measure the size of the link layer frames being transmitted across the<br />

contention channel.<br />

This monitor measures the size of the link layer frames being transmitted<br />

across the control channel.<br />

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