Wireless Modem network from the late 90's. Before I retired I lived in San
Francisco a few years, these units were on light poles about one per city
block.
"Scott en Aztlán" wrote in message
news
I've seen several of these devices attached to the street light poles
in Irvine, CA. Clearly there is some kind of radio inside the box, but
what is their purpose?

http://tinypic.com/6okknl.jpg