A UPS system for communications systems. The UPS system comprises an input stage that generates primary and standby AC power signals. The primary and standby AC power signals are passed through an isolation transformer and through an output rectifier to obtain an output DC power signal. A plurality of...http://www.google.com.au/patents/US6288916?utm_source=gb-gplus-sharePatent US6288916 - Multiple output uninterruptible alternating current power supplies for communications system
