| 摘要 |
PURPOSE:To perform loop back processing similarly when an individual subscriber line is present by informing a terminal side of a subscriber line disconnection when detecting 'loop 1A' indicating the analog loop back operation of the individual subscriber line and then informing a line side of the same state with the analog loop back operation. CONSTITUTION:When the 'loop 1A' as an analog loop back test instruction on the outgoing side of the individual subscriber line of a subscriber line terminal device 20 is actuated from the line side, the control part 13 of a remote device 10 detects the 'loop 1A', actuates a loop control part 14 to inform terminals A-N, connected to the subscriber line, of the subscriber line disconnection, and informs the subscriber terminal station device 20 of the same state with the analog loop back operation. Consequently, the loop back processing at the time of a subscriber line loop back test is performed similarly to that when the individual subscriber line is present. |
