Call processing system with an operator assistance in a telephon

Details Call processing system with an operator assistance in a telephon Call processing system with an operator assistance in a telephon

1979-08-28

1982-01-05

Brown, Thomas W.

Multiplex communications

Wide area network

Packet switching

370 62, H04J 314, H04M 320

Patent

active

043095720

ABSTRACT:
In a telephone switching system having a main-speech-path switch, connected to a plurality of subscribers and a plurality of board trunks, the connection in the main-speech-path switch is controlled as follows. In the first mode, the connection between a calling channel and one of the board trunks and the connection between a called channel and the board trunk are established through the main-path-switch, so as to selectively enable speech between an operator connected to said board trunk and one of a calling subscriber and a called subscriber. In the second mode, the connections between the calling channel and the called channel is directly established in the main-speech-path switch, while simultaneously connecting the two channels to the board trunk through the main-speech-path switch, so as to enable to monitor the speech between the calling subscriber and the called subscriber by the telephone operator. In the third mode, the main-speech-path switch effects only the connection between the calling channel and the called channel, while clearing the connection between said two channels and said board trunk. Thus, the main-speech-path switch is free from the board trunk except for the monitoring and the initial connection operation, and can increase the exchange capability.

REFERENCES:
patent: 3171896 (1965-03-01), Bartlett et al.
patent: 3293369 (1966-12-01), Schroeder
patent: 3976841 (1976-08-01), Picandet
patent: 3978290 (1976-08-01), Sarma
"New Switching Concept for Multilocation Customers", Carlson et al., Bell Laboratories Record, vol. 49, No. 8, Sep. 1971, pp. 231-237.
"SP-1 TOPS: Electronic Switching Improves Operator Services", Bierman, Telesis, vol. 3, No. 5, Feb. 1974, pp. 143-150.
"The GTD-120 Centralized Attendant Service Digital PABX", Garay, GTE,Automatic Electric Journal, Jan., 1978, pp. 2-10.
"KDX-O International Telephone Switching System", Nakagome et al., International Switching Symposium, Boston, Jun. 1972, pp. 1-25.
"The XE-1 Stored Program Controlled International Telephone Switching System", Ikeda et al., International Switching Symp., Kyoto, Japan, Oct. 1976, pp. 211-3-1 thru 211-3-8.

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