Title:
MULTIFREQUENCY SIGNAL SUPPLYING DEVICE AND METHOD THEREFOR
Document Type and Number:
Japanese Patent JPS6085657
Kind Code:
A
Abstract:
There is disclosed a multifrequency tone distribution arrangement for a communication system having a common time division multiplexed bus (A, B) in which digital samples of tone frequencies are supplied from a central signal generating circuit (100) to system port circuits (200) via selected time slots under the control of a central call processor (300). Each port circuit automatically accepts selected signals from the common bus for conferencing to produce multifrequency digit tones and service tones.
Inventors:
KURAIA ARAN BUZAADO
KENTO BUINSENTO MINA
KENTO BUINSENTO MINA
Application Number:
JP19184184A
Publication Date:
May 15, 1985
Filing Date:
September 14, 1984
Export Citation:
Assignee:
AMERICAN TELEPHONE & TELEGRAPH
International Classes:
H04L27/26; H04M1/50; H04M3/56; H04M11/00; H04M11/06; H04Q1/457; H04Q11/04; (IPC1-7): H04L27/26; H04M1/50; H04M11/06
Domestic Patent References:
| JPS56153876A | 1981-11-28 | |||
| JPS5480003A | 1979-06-26 |
Attorney, Agent or Firm:
Masao Okabe (2 outside)