Verizon has announced four more suppliers for its fiber-to-the-premises (FTTP) build-out starting next year, but analysts say the winners should be cautious, as these contacts are not exclusive and there are no quantity guarantees

The four suppliers announced today -- Corning Cable Systems, Preformed Line Products Co, ADC Telecommunications Inc., and Tyco Electronics -- will provide fiber optic cabling and other outside plant equipment for the FTTP system.