Conferencing arrangement for use in a PCM system

Details Conferencing arrangement for use in a PCM system Conferencing arrangement for use in a PCM system

1975-09-18

1977-05-10

Stewart, David L.

179 15AT, H04M 356

Patent

active

040229912

ABSTRACT:
A conference arrangement for use in a pulse code modulated system including first and second control memories and a comparison logic circuit. Two words corresponding to two channels are read from information memory during each time slot and after proper comparison, the largest sample is transmitted to a third channel. Also included is a dial tone source for supplying dial tone to all terminations in the system by writing a time slot number assigned to the dial tone source and the respective ones of the channel memory words in the control memory associated with the channels.

REFERENCES:
patent: 3171896 (1965-03-01), Bartlett
patent: 3492435 (1970-01-01), Inose
patent: 3504123 (1970-03-01), Fischer
patent: 3508007 (1970-04-01), Goodall
patent: 3517135 (1970-06-01), Fisch
patent: 3699264 (1972-10-01), Pitroda
patent: 3748394 (1973-07-01), Thomas
patent: 3790713 (1976-08-01), Neufang
patent: 3870826 (1975-03-01), Carbrey
patent: 3883697 (1975-05-01), Brown
patent: 3940564 (1976-02-01), Orbach

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