Stored program controlled electronic exchange - has computer and common signal controller with MODEM for each data link

The electronic exchange is for a common channel signalling system through separate data links. The control facility of the electronic exchange is shared by a common signal controller and a stored program type computer. The controller processes signals in the data links relating mainly to the transmission of signals such as serial-parallel conversion error control etc., while the computer processes signals relating to the copy of the transmitted signals. A common clock generator is provided for all data links for driving a number of MODEM's in the common signal controller and sending a signal in each data link in the same phase. A pair of common signal controllers may be provided on a dual mode operation basis.