Communication method and equipment for freeze-frame video phone
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 30, 1993
Issued Date -
N/A
app pub date -
Jan 16, 1992
filing date -
Sep 6, 1989
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention comprises a system bus performing control and data transmission function among modules, a system control means, connected to the system bus, performing system control and interrupt control function, a modem and DTMF signal processing means, connected to the system bus, performing modulation and demodulation in the transmission rate of 9,600 bps, 4,800 bps, and 2,400 bps, and transmission and reception of DTMF signal, a standard telephone line connection means connecting the modem and DTMF signal processing means and a telephone to a standard telephone line, a program ROM, connected to the system bus, storing a program which controls communication through the modem and DTMF signal processing means, and a RAM, connected to the system bus, retaining current data.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully