| 摘要 |
PROBLEM TO BE SOLVED: To set use/non-use of a highway without provision of a setting switch to each highway by providing a comparator to a major highway and providing a dual port RAM to other highways. SOLUTION: When each channel is supplied from a separate section 4-1 of a highway #1 to a processing section 5, the comparator section 5 compares whether or not a content of a designated channel storing information commanding use/non-use of highways #2, #3 with a preset code and provides an output of enabling the corresponding highway #2 or #3, and when a speech signal and a control signal are received to the highway #2, the signal is written in a dual port RAM6-1 in a write timing 6a at the network side, and when an operating state command signal 5a is received, reading is started. The read signal is outputted via a separate section 4-2, the speech channel signal is outputted from a control section 7-1 and the control channel signal is outputted from a control section 7-2. |
