FIELD: duplication of call of remote subscriber system having active processor and standby processor. SUBSTANCE: process involves check of formation of call from subscriber under normal condition of redundancy of active and standby processors, transmission of subscriber's number and number of voice channel if call is formed to organize conversation to standby processor, keeping of subscriber's number and number of voice channel in working region and connection of port corresponding to subscriber's number and number voice channel with temporary switch of standby processor if call is not formed, check of completion of call and if call is completed, transmission of subscriber's number and number of voice channel for condition of ring-off of call to standby processor and disconnection of temporary switch from port corresponding to number of voice channel and subscriber's number for condition of call. EFFECT: stabilization of commutation system thanks to duplication of calls of remote subscribers. 5 dwg
