Zhone Technologies, Inc. (Zhone) designs, develops and manufactures communications network equipment for telephone companies and cable operators worldwide. The Company’s products allow network service providers to deliver video and interactive entertainment services in addition to their existing voice and data service offerings. Its single line multi-service (SLMS) architecture provides support for voice over Internet protocol (VoIP) and IP video (IPTV). Within this SLMS architecture, Zhone products allow service providers to deliver all of these converged packet services over their existing copper lines while providing support for fiber build-out. With its products, network service providers can migrate from traditional circuit-based networks to packet-based networks and from copper-based access lines to fiber-based access lines without abandoning the investments they have made in their existing infrastructures.