Synchronizing method in time-division multiplex transmission systems

Claim 1

A synchronism method in time-division transmission system having a transmitter storage at the transmitter exchange and a receiver storage at the receiver exchange, wherein the transmission and reception of units of information take place under the control of a timing bit provided both to the transmitter exchange and at the receiver exchange, by which bit counters provided at the sending and at the receiving exchanges can be stepped, comprising: 1. generating a timing bit in the transmission system and providing said bit to said bit counters at the transmitting and receiving exchanges, 2. generating a channel pulse upon overflow of the bit counter at the receiver exchange, 3. applying the channel pulse to a word input register whose output is connected to said receiver storage and to a channel counter coupled to said receiver storage for determining the current storage location seized in said receiver storage, 4. transferring from said transmitter exchange to said receiver exchange in free positions of said determined channel the channel number and a designator of said channel number to said word input register, 5. transferring said received channel number to a comparator circuit for comparison with the curRent channel number produced by said channel counter in response to said channel pulse to determine if synchronism is maintained, and blocking the path of said word input register to said receiver storage if synchronism is not maintained, 6. displacing said bit sequence including the received timing bit by one channel position, 7. loading the next channel number received by said word input register and identified by its accompanying designator directly into said channel counter so that the storage location determined by said channel counter coincides with the presently seized storage location.