摘要 |
PURPOSE:To enable the folding of the station itself, by providing a buffer and an address generator at the transmission and reception sides, and supplying the signal corresponding to the address to a time division echo suppressing functional block. CONSTITUTION:The transmission and reception signals corresponding to the same addresses are fed to a time division echo block functional block 105 from buffer circuits 103, 104 of transmission and reception sides at the same time zone from address generators 106, 107, to constitute N sets of time division multiplex echo suppressor. By connecting terminals 5 and 6 and changing the address at transmission side when the folding at the station itself is made, tentative operation can be made as an echo suppressor. |