1. A monitor system for monitoring the voice of subscribers accommodated by remote local equipment connected to a time division switch in a telephone network, wherein the voice monitoring system for remote subscribers comprising: first connection means for providing monitoring paths in the concentrator in the remote local equipment and connecting speech paths for subscribers set in speech mode to said monitoring paths; supervision means for supervising the call statuses of subscribers accommodated by the remote local equipment connected to the time division switch in the telephone network; voice monitoring telephone connected to one circuit of a trunk for three party speech handled by the time division switch in the telephone network; and second connection means for connecting the monitoring paths provided in the remote local equipment to the remaining two circuits of said trunk for three party speech, according to the call statuses of said subscribers.