XO Communications has added new enhancements to XOptions Flex, its award-winning VoIP bundle, that enable businesses with larger offices to take advantage of the cost-savings of VoIP without having to invest in new telephone equipment. The enhancements allow businesses to utilize XOptions Flex with their existing PBX equipment and support businesses with up to 160 employees at each location. XOptions Flex combines unlimited local and long distance calling, dedicated Internet access and web hosting for a flat monthly price.