Symmetricom's CsIII™ is a lightweight, compact, economical cesium frequency standard. The technology developed for the CsIII is an evolutionary step forward in the quest for higher stability, lower phase noise and longer life. An ever-increasing base of demanding users in communications, timing, synchronization and other applications take advantage of this performance.Packaged in a 2U, 19" rack mounted chassis; the CsIII weighs less than 30 lbs. Standard features include 5 and 10Mhz sine wave outputs, a 1 PPS output and an RS-232 interface used to monitor and control the unit. Optional T1/E1 telecom outputs and a portability kit are also available. The portability kit replaces the rack mounting brackets with a movable handle and hard shell carrying case making it ideal as a remote calibration standard.