Hi KBV1
Have a read of this, its an old thread but nothing much has changed:
http://www.cableforum.co.uk/board/87...formation.html
It sounds like your network either has an 802.11b card (mybe built into a laptop?) or is dropping to 11mbs automatically due to other factors such as interferance from dect phones, microwaves (all work on the same public frequency) or other nearby wireless networks.They will drop even lower by the way in much the same way as a phone modem does, in order to prevent data loss.
Sparky