I have done a lot more reading and getting my head around the issue. I don't know much about this stuff. Saw some comments made in this thread http://forum.transmissionbt.com/viewtopic.php?f=2&t=2868
I tried the advice: "A quick follow-up to this: it seems the poison peers don't support encryption ...
I have a similar issue with my D-Link G604T. Early on (a year or so ago) I got quite good transfers, i.e. 8 or more, and only every so often my modem froze and I would have to reset it. Gradually it happened more and more to a point now where it freezes my whole modem after only 10 secs ... even ...