As I understand it:

Graybar is a national Distributor and one of the largest.
Siecor is probably the largest manufacturer of fiber in the market.

Anixter is the largest Siecor Distributor.

Siecor approached Graybar and told them that if they would carry only Siecor Fiber Optic Cable that they would offer them the same pricing that they offer Anixter.

I know that many other Distributors are very excited at the opportunity to pick up much of Graybars business.

This is just what I've heard.............