H - Electricity – 03 – K
Patent
H - Electricity
03
K
363/15, 344/25
H03K 11/00 (2006.01) H04J 3/02 (2006.01) H04J 3/20 (2006.01) H04Q 11/04 (2006.01)
Patent
CA 1041682
ABSTRACT OF THE DISCLOSURE: The present invention relates to a system for coupling a PAM time division system to a PCM time division system. The system comprises a speech signal processing circuit including a plurality of parallely connected sections, each of these sections having one end connected to a channel of the PCM sys- tem and another end to a main speech line of the PAM system. Each section comprises a plurality of switching and storing means for directionally transferring speech information between the PAM and PCM systems. Computing means, having at least two cyclic memories provided with a plurality of stages, control and select one speech section, one cyclic memory storing the address of a calling subscriber. The computing means energize switches corresponding to the selection of that one speech section. And, a timing circuit sequentially actuates the switching means and thereby transfers information from one storing means to another, whereby the speech information are bidirectionally exchanged between the PAM and PCM systems.
213414
Camiciottoli Roberto
Valbonesi Giuseppe
Na
Societa' Italiana Telecomunicazioni Siemens S.p.a.
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