Methods and systems are disclosed for eliminating a phase transient of a controlled frequency oscillator caused by replacing a first reference signal by a second reference signal when the first reference signal becomes corrupted or otherwise unavailable, and for running a controlled frequency oscillator...http://www.google.es/patents/US6259328?utm_source=gb-gplus-sharePatente US6259328 - Method and system for managing reference signals for network clock synchronization
Method and system for managing reference signals for network clock ...
