LignUp Corporation is a leading provider of software only, SIP based Voice Applications and Infrastructure for enterprises. The LignUp applications portfolio includes SIP-PBX, SIP-Centrex, Voice Mail, Unified Messaging and Outbound Calling applications developed on the LignUp Communications Infrastructure, a software only, standards-based, web services-enabled platform. This infrastructure facilitates the cost-effective development and flexible deployment of multiple voice and voice enabled business applications. With LignUp Applications and LignUp Communications Infrastructure, systems integrators, network integrators and service providers have quickly assembled differentiated, cost competitive solutions for enterprise customers. A privately held company, LignUp is based in Mountain View, California and has offices in Salt Lake City, Shanghai and Tokyo.