Circuit arrangement and process for producing conference connect

Details Circuit arrangement and process for producing conference connect Circuit arrangement and process for producing conference connect

1978-06-05

1980-02-26

Tupper, Robert S.

179 15AT, H04M 356

Patent

active

041907442

ABSTRACT:
In producing conference connections between, in each case, three conference parties in a PCM time multiplex switching system, sum code words formed of PCM words supplied by the respective remaining conference parties, possibly after conversion thereof into linear code representations and reconversion into non-linear code representations subsequent to summation, are fed to the conference parties. For each conference party a coordinated memory cell, which is selectively triggered not only during writing but also during reading is engaged in two equal-sized halves of an information memory. The PCM words delivered by the conference parties are written into the engaged memory cell of the first half of the information memory during the time position in which they occur and the PCM word located in the cell is, in the process, not only fed to an adder as a first input magnitude, but also read into the relevant engaged memory cell of the second half of the information memory. The PCM word located in the second half of the memory is, in the process, read and fed to the adder as a second input magnitude and the sum code word (A+B, B+C, A+C) supplied by the adder is fed to that conference party whose PCM word has been entered into the engaged memory cell of the first half of the information memory.

REFERENCES:
patent: 3551600 (1970-12-01), Berch
patent: 3984643 (1976-10-01), Inrig et al.

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