User's Guide

Appendix C. DS.11 FAQ
BreezeNET BU-DS.11/RB-DS.11 C-5 User’s Guide
The DS.11 comes with a Windows based manager utility. With this utility you can configure link
parameters and monitor signal quality and RSSI (received signal strength indication). Optimizing
antenna alignment is done using the signal quality and RSSI display. Any computer on the network
can use this utility to manage the BU-DS.11/RB-DS.11.
Is the DS.11 compatible with other DS equipment from other vendors?
Yes. However, for the outdoor bridges, interoperability can vary from vendor to vendor, and in
some cases it may not operate if the manufacturer’s implementation is not pure 802.11. The BU-
DS.11/RB-DS.11 can operate at 1 and 2Mbps with legacy 802.11 DS equipment, and at 5.5Mbps
and 11Mbps with 802.11b High Rate DS equipment.
Does the BU-DS.11/RB-DS.11 DS.11 support 802.1d spanning tree protocol?
No, the BU-DS.11/RB-DS.11 does not support spanning tree. This is because the BU-DS.11 can
also support roaming devices.
What is the normal PER (packet error rate) for the BU-DS.11/RB-DS.11?
The error rate will be about 4%-6% (transmitted fragments vs. retry count). This is typical when
operating in a non-interference environment at maximum range for bi-directional traffic loads. If
the traffic load is more uni-directional, then the PER will be less.
What is the best value for the CW win parameter on the DS.11?
Setting the CW win parameter to 31 for heavy bi-directional traffic loads will minimize the PER.
Setting the CW win to 15 will improve performance for more uni-directional traffic loads. CW win
7 should only be used for short range point-to-point links, and 63 should be used for large, long
range multi-point links.