Specifications

Propagation Delay Example
8-6 Propagation Delay
To calculate the One Way propagation delay time, add the values in the
shaded bottom right hand corner of Table 8-2 and Table 8-3 together.
Equipment Delay: 10.58 µs
Cable Delay
12.87 µs
Total One Way Delay 23.45 µs
As with designing anything, it is not advisable to design to the limits of
the specification. As an electronic device ages, its internal propagation
delay may change. Also, as devices such as repeaters and transceivers are
changed due to upgrades or changing from one vendor to another, the
propagation delay times may change as well. By using the worst case
values for the delay times you should have a comfortable amount of
design buffer built into your network.