Communication device capable of controlling transmission parameters of outputted DTMF signals
US5781626A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 28, 1997 |
| Grant date | Jul 14, 1998 |
| Priority date | — |
| Expiry date | Apr 28, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q1/453
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.