| 摘要 |
PURPOSE:To improve greatly the degree of freedom of the new construction and extension of a circuit by allowing a detection and indication control part which detects and indicates the on-off state of the electric level signal of a device to serve as both a network controller and a modem, and making data transmission and reception control parts correspond to detection and indication control parts in one-to-one relation. CONSTITUTION:The circuit control circuit consists of plural equipment terminals 1a, 1b-1n each including a network controller or modem, detection and indication control parts 2a, 2b-2n which are connected to said terminals 1a, 1b-1n and detect and indicate the on-off state of the electric level signal of said network controller or modem, and data transmission control parts 3a, 3b-3n which are connected to said detection and detection control parts 2a, 2b-2n, one to one. Therefore, the detection and indication control parts 2a and 2b when detecting the on-off state of the electric level signal of the corresponding network controlle or modem sends it to the data transmission and reception control parts 3a and 3b, which perform data transmission and reception control over the network controllers or modems respectively. |
