| 摘要 |
PURPOSE:To prevent impairing of communication with other terminal equipment by connection of a testing function to a terminal equipment to be tested and to a normal terminal equipment for testing by connecting the terminal equipment to be tested and two terminal equipments of normal terminal equipment to a testing device provided on the exchange side by a switching device, and setting only two terminal equipments to testing mode. CONSTITUTION:A terminal equipment (TE) 1-1 inputs to a terminal testing device (TSTE) 6 informing of starting of test of a terminal equipment (TE) 1-0. A signal sent to the terminal equipment (TE) 1-0 is added as input information. The terminal testing device (TSTE) 6 sends out a signal to the terminal equipment (TE) 1-0 by following up a command from the terminal equipment (TE) 1-1. The terminal equipment (TE) 1-0 operates by following up the signal from the exchange side, and sends out a reply signal to the exchange side. The exchange side receives the signal from the terminal equipment (TE) 1-0 in the terminal testing device (TSTE) 6, and sends out the signal from the terminal equipment (TE) 1-0 to the terminal equipment (TE) 1-1. The terminal equipment (TE) 1-1 compares the signal sent out previously with a signal sent back based on the sent signal, and checks the normality of the terminal equipment (TE) 1-0. |
