User Manual

Version 3.03 SPEEDLAN 9000 Series Installation and Operation User Guide
5-10 Using the Configurator to Set Up Special Parameters for CPE Routers
rate will drop to 5.5 Mb/s and another attempt will be made. If after the third retry, the
transmission is still not successful, the signaling rate will drop to 2 Mb/s for the fourth
and fifth retry, and then to 1 Mb/s for the sixth and seventh retry (if needed).
The recipient sends acknowledgements at the same signaling rate at which it receives
frames. When a frame is successfully transmitted (acknowledgement received in the
case of unicast), the transmitter immediately proceeds to the next frame. The last
signaling rate used to transmit (other than acknowledgements) becomes the current
rate. After ten consecutive unicast frames, the current rate returns to the highest rate
selected, if it is not already at that signaling rate. Note that the receiver's signaling rate
is not affected (other than returning the acknowledgement at a possibly different rate).
Each transmitter's fallback schedule is independent of the signaling rate used by other
transmitters.
Max Throughput (Regulating Bandwidth)
Max Throughput is useful to ISPs that want to regulate the maximum bandwidth
provided to each customer. The following page appears when the Max Throughput
button is clicked:
Figure 5-6: Max Throughput page