Synchronized protection switching arrangement

摘要: A multichannel data link switching control arrangement for synchronizing the substitution of one channel another without causing insertion or deletion bits from transmitted over communication path that is coupled to channels. The monitors relative timing between on a be replaced and replacement channel. Precisely controlled delay circuitry delays other until signals two channels are within ± quarter bit each other, at which time effected. includes pair switch units may selectively couple either active an output link. Each unit contains input multiplexer switch, operations by monitoring apparatus unit. outputs signal combining splitting phase compared with being through controllable dual configuration serves respect as both applied respective streams synchronized. At time, effect simultaneous switches in unit, whereby action remains channel, except no further incrementing carried out.