| 摘要 |
<p>PURPOSE:To avoid mis-recognition of a fault due to a fact that an opposite station is executing local loopback by driving also a remote loopback means of an opposite station simultaneously in case of driving the local loopback means of its own station. CONSTITUTION:When the 1st terminal station 11 drives a local loopback means 21, the remote loopback means 24 in the 2nd terminal station 12 being an opposite station is driven simultaneously. In this state, a display light 31 of the 1st terminal station 11 lights in red and a display light 32 of the 2nd terminal station 12 lights in yellow and the 2nd terminal station 12 observes the yellow display light 32 to recognize it that no remote loopback is available in the 1st terminal station 11. Thus, when the own station executes the remote loopback, mis-recognition of a fault due to a fact that the opposite station is executing the local loopback is prevented.</p> |
