Circuit arrangement for telephone exchange systems, especially s

Details Circuit arrangement for telephone exchange systems, especially s Circuit arrangement for telephone exchange systems, especially s

1979-08-20

1981-09-08

Popek, Joseph A.

179 2DP, H04M 1106

Patent

active

042886627

ABSTRACT:
For extension of data traffic within a telephone exchange system to separate data exchange systems, special connecting sets, which are provided for data traffic within the telephone system, are fixedly connected via special facilities with subscriber exchange lines of the separate data exchange system. The special facility thereby takes over the function of the conversion from line and data signals from one system into the other and vice versa. For securing of telephone subscriber selection criteria in the case of arriving traffic from the data exchange system, arriving connection requests are only acknowledged if the selection digits which are necessary for the build-up of the telephone connection which conducts them further have arrived in the special facility. Besides this, the telephone ring signal for the desired telephone station is suppressed. The exemplary disclosre is particularly suited for the coupling of a telephone system with a separate telegraphy exchange system, whereby the selection possibilities of both systems can be used for telegraphy traffic.

REFERENCES:
patent: 4009342 (1977-02-01), Fahrenschon et al.

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