Applied Voice & Speech Technologies, Inc. (AVST) is a privately held software company headquartered in Orange County, California. It specializes in developing business communications solutions focusing on medium to large enterprise, government, higher education, healthcare, and hospitality markets.The company is known for its primary product, a speech-enabled unified communications platform, called CX-E (formerly CallXpress). CX-E applications include call processing, voicemail, unified messaging, personal assistant, mobile client, automated attendant, uniform call distribution (UCD), fax, speech, notification and other business process capabilities. AVST is one of the few switch independent developers of unified messaging/unified communications solutions.