backbone providers in the U.S. With the nation’s largest, fully-lit, next-generation fiber-optic broadband network, WilTel delivers voice, data, video and IP services for some of the world’s largest telecommunications carriers, Internet service providers, global media and entertainment companies. Their MPLS-enabled IP packet over SONET (PoS) backbone offers superior redundancy, lower costs and unsurpassed IP reliability. The WilTel OC-48 PoS backbone has nearly 300 interconnection points nationwide.