DTMF Tone Generator for Landline Call Transfer
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Solution Overview
Problem
Mobile telephone services often experience unreliable signal strength in certain geographic areas, leading to dropped calls and connectivity issues, while landline services are more reliable but less convenient for dialing due to limited programmable speed dialing options and lack of name-number association.
Innovation Solution
A system and method that enables a mobile telephone to transfer dialing intelligence to a nearby landline telephone, using a DTMF tone generator to produce audible tones representing a telephone number, allowing the landline to dial the number and establish a call, thereby leveraging the reliability of landline services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mobile telephone services are used for dialing, then convenience and mobility are improved, but signal reliability deteriorates in certain geographic areas
Solution Approach 1:
The patent introduces a landline telephone as an intermediary device to transfer dialing intelligence from the mobile telephone. The mobile phone generates DTMF tones representing the dialed number, which are then transmitted to the landline telephone that actually executes the dialing operation. This intermediary approach allows the user to benefit from mobile convenience while the landline's reliable infrastructure handles the actual call establishment.
Solution Approach 2:
The dialing process is segmented into two distinct functional parts: (1) mobile telephone generates and transmits dialing intelligence (DTMF tones), and (2) landline telephone executes the actual dialing operation. This segmentation allows each component to optimize for its specific function - mobility for the mobile phone and reliability for the landline.
2Reliability
If landline telephone services are used for dialing, then signal reliability is improved, but ease of operation deteriorates due to limited programmable speed dialing options
Solution Approach 1:
The mobile telephone serves multiple functions in this system: it acts as both the user interface for selecting contacts and generating dialing intelligence, and as the communication device for transmitting that intelligence to the landline. This multi-functionality allows the mobile phone to provide the convenience features (address book, speed dialing) while the landline provides the reliable delivery mechanism.
3Productivity
If mobile telephone dials a number directly, then dialing speed is improved, but call reliability deteriorates in areas with poor signal strength
Solution Approach 1:
The landline telephone serves as an intermediary that receives DTMF tones from the mobile telephone and executes the actual dialing operation. This allows the mobile phone to maintain its fast dialing capability while the landline's stable infrastructure ensures reliable call connection, effectively decoupling dialing speed from call reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution increases the reliability of mobile telephone services by allowing calls to be made through more reliable landline units, even in areas with poor mobile signal strength, and provides a convenient method for dialing contacts without manual entry, enhancing the user experience.
Implementation Method 1
a DTMF tone generator coupled to the speaker, and coded intelligence executing from a non-transitory physical medium, enabling a user to select a contact, causing the DTMF tone generator to produce a DTMF tone sequence associated with the contact's telephone number audibly over the speaker
Data Source
AI summary
A mobile telephone has radio-frequency connection to a cellular network, a speaker, a stored contact list including telephone numbers for the contacts, a DTMF tone generator coupled to the speaker, and coded intelligence executing from a non-transitory physical medium, enabling a user to select a contact, causing the DTMF tone generator to produce a DTM tone sequence associated with the contact's telephone number audibly over the speaker.