Correction...
According to the vendor's tech folks, the overnight problem was
ultimately that...
* they assumed, or were told, that, if they were lending or
selling a hugh number of cards, nothing would be on the system
besides their (new, up-to-date) cards. Consequently, the beacons
were configured to talk 11Mb, no matter what.
* The 1 and 2 Mb cards don't do too well when spoken to at 11Mb.
* Once they realized the problem and reconfigured the beacons to
negotiate speed with the cards, Lucent cards at firmware version
4.52 (or maybe 4.x) and forward, and cards compatible with them,
started working.
There are obviously several lessons here which are left as an
exercise.
john