15-06-2012, 10:49 AM
DTMF TELEPHONE REMOTE CONTROL
dtmf.pptx (Size: 528.79 KB / Downloads: 55)
INTRODUCTION
This project describes the controlling of a system by interfacing the telephone line . Using this interface any device can be controlled using a telephone or cell phone. The system involves the use of DTMF tones commonly used in telephone networks.
ADVANTAGES
DT MF SIGNALLING WORKS ON VIRTULLY ALL RADIO SYSTEMS
OPTIONAL TELECO INTERFACE
COST EFFECTIVE
DISADVANTAGES
Late delivery of sms because of traffic
APPLICATIONS
Control the light of advertising board:
Credit card system
In remote control systems
In personal computers
Telephone answering machine
PBEX