What kind of cable is this?

[Jonathan Nichols <jnichols () pbp net>]

http://homepage.mac.com/smurphy/PhotoAlbum28.html

Guy I know in Canada came across a 7200 foot spool of what appears to be 
single-strand fibreoptic cable.

He's trying to find out its properties, UV rating, etc. Any information 
available would be great.

I Googled for the part numbers (so did he) and came up empty. Siecor 
appears to be "Corning Cable Systems" now and their website was 
unhelpful, to say the least.

If anyone has any information or knows much about this stuff, could you 
drop me a note offlist?

Thanks!

-Jonathan