Title :
Improved Multifrequency Receiver for 2/6 Code Communications Switching
Author :
Beeman, Robert H.
Author_Institution :
Automatic Electric Labs.,Inc.,Northlake,IL
fDate :
6/1/1970 12:00:00 AM
Abstract :
Telephone interoffice signaling is often accomplished through the use of a system in which digits and control signals are represented by two frequencies chosen from a group of six. A new receiver is described, which provides improved system performance in the presence of noise, line transients, and interfering signals. Several interesting circuit innovations are described.
Keywords :
Band pass filters; Circuit noise; Communication switching; Communication system control; Control systems; Detectors; Frequency; RLC circuits; System performance; Telephony;
Journal_Title :
Communication Technology, IEEE Transactions on
DOI :
10.1109/TCOM.1970.1090358