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Preferred Support builds on the remote services in Essential Support to deliver even greater value. Preferred Support includes proactive monitoring and system alarm resolution with the Avaya-patented EXPERT Systems SM, which can reduce major outage risk by as much as 74 percent and, on average, has a 20% faster resolution time 1, 2. Avaya will also monitor public switch telephone network (PSTN) facilities for problems and alert your telecom team for immediate resolution, helping to save precious time and reduce risk to your communications environment.