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S20 Support 20 Users 10 Concurrent Calls S50 Support 50 Users 25 Concurrent Calls S100 Up to 200 Users Up to 60 Concurrent S300 Up to 500 Users Up to 120 Concurrent S412 Up to 12 FXS Extensions Up to 4 CO/BRI lines Easy Configuration and Management Fast installations with advanced auto-configuration, auto-detect and plug […]