Title:
DIGITAL TRANSMISSION SYSTEM
Document Type and Number:
Japanese Patent JP3263188
Kind Code:
B2
Abstract:
PURPOSE: To multiconnect plural digital telephone sets to one digital extension circuit of a telephone exchange without using a multiplexer.
CONSTITUTION: In the constitution where plural digital telephone sets 2A and 2B are directly multiconnected to a digital line 4 presented from a telephone exchange 1, digital telephone sets 2A and 2B simultaneously send burst signals including respective speech data based on the timing dependent upon the burst signal received from the telephone exchange 1, and burst signal from the digital telephone set 2A and that from the digital telephone set 2B are subjected to waveform synthesis on the digital line 4 to generate one burst signal, and speech data of digital telephone sets 2A and 2B are transmitted to the telephone exchange 1 by one burst signal.
Inventors:
Tatsuhiko Ando
Yuji Kobayashi
Masumi Kumakura
Yuji Kobayashi
Masumi Kumakura
Application Number:
JP15794493A
Publication Date:
March 04, 2002
Filing Date:
June 03, 1993
Export Citation:
Assignee:
Hitachi Telecom Technology Co., Ltd.
International Classes:
H04M3/00; H04Q3/58; H04Q5/00; H04Q11/04; H04L25/49; (IPC1-7): H04M3/00; H04L25/49; H04Q3/58
Domestic Patent References:
| JP4229733A | ||||
| JP6232832A | ||||
| JP6261437A |