Communication device capable of controlling transmission paramet

Details Communication device capable of controlling transmission paramet Communication device capable of controlling transmission paramet

1997-04-28

1998-07-14

Zele, Krista

Telephonic communications

Supervisory or control line signaling

Substation originated

379 93, 379418, H04M 150

Patent

active

057816263

ABSTRACT:
A communication device, such as a telephone or a facsimile device, includes an input device for inputting code information for a call to be transmitted through a communication network, a transmitting device for transmitting dual-tone multiple frequency (DTMF) signals to the communication network according to the code information, and a transmission control device for controlling transmission parameters of a DTMF signal. At least one of a plurality of parameters, including signal transmission time, signal pause time, and signal transmission level, is made different by the transmission control device for a DTMF signal transmitted during the call by the transmitting device after the execution of a dialing input from the communication device to the communication network.

REFERENCES:
patent: 5010569 (1991-04-01), Katagawa
patent: 5020099 (1991-05-01), Katagawa
patent: 5327492 (1994-07-01), Parola
patent: 5369697 (1994-11-01), Murray et al.
patent: 5416835 (1995-05-01), Lee
patent: 5422945 (1995-06-01), Wyatt
patent: 5530743 (1996-06-01), Sakurai
"Technical Reference Material For Utilizing Telephone Network", Third Edition, The Telecommunications Association, p. 12, 1992.
"Technical Requirements for Terminal Equipment to be Linked to Analog Connection Points" (Parts 1 and 2), Federal Ministry of Posts and Telecommunications, FTZ 1TR2 vol. 1, p. 23, 1990.
"Technical Requirements for Connection of Single Line Equipment to the Hong Kong Public Switched Telephone Network (PSTN)" Customer Technical Guide No. 20, Issue 1, Hong Kong Telephone Company Limited, pp. 26-27, 1990.

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