sentences:  Any originating call that was to terminate on the same machine would pass through the entire originating section, then a trunk would be selected to the terminating section, where the last 4 or 5 digits of the telephone number were used to determine the location of the called line.Unlike the earlier panel system where calls originated and terminated on separate frames, the No.1 Crossbar placed all subscriber lines on one of several line link frames, which were used for origination and termination.