Title:
COMMUNICATION CONTROL SYSTEM
Document Type and Number:
Japanese Patent JP2003250012
Kind Code:
A
Abstract:
To simplify a circuit configuration between a center facility and a wired terminal group (a plurality of operation terminals connected to the center facility) in a wireless system.
A DSP is mounted on a interface section with each wired terminal and the DSP controls various tone signals and MSK signals to superimpose the various tone signals and the MSK signals on a voice line. As a result, since it is not necessary to newly provide a data line in addition to the voice line, the circuit configuration can be simplified.
Inventors:
HIGANO TAKAMITSU
Application Number:
JP2002046220A
Publication Date:
September 05, 2003
Filing Date:
February 22, 2002
Export Citation:
Assignee:
HITACHI INT ELECTRIC INC
International Classes:
H04M11/00; (IPC1-7): H04M11/00