This is a cesium-beam primary standard oscillator/clock with long-term stability better than 7x10^-13 (about 60 ns per day). It produces various outputs which can be used by the UTC to provide a precise frequency and time reference when used in conjunction with a timecode receiver. Used to stabilize frequency with the NTP local-clock algorithms, a time server will ensure accuracy to a millisecond even after all contact with a reference source has been lost well over the expected life of the beam tube, which is about ten years.