Thanks for your reply, Bigpaws.
I moved the device to another port and see that I made a couple of mistakes - couldn't read my own writing!
Buss 001 Device 005: ID 0ace:1215 XyDAS 2D1211B 802.11g
ifcofig shows only wlan0 (other than lo and ethernet
iwconfig essid qwest5177
Unknown command qwest5177
lwconfig no change