| 摘要 |
This invention describes a universal method of producing a plurality of analog telephone signal types, commonly used repeatedly, with telephone peripheral, terminal and central office equipment, using a single means. Signal types include dual tone multi-frequency (DTMF), dial tone, voice prompt, voice message, busy tone, ring back tone, frequency shift key (FSK), fax and modem, to name a few of the most common. The invention describes specific telephone devices and systems that are made more versatile by, or possible by, the application of this analog telephone signal production method. One such device is an acoustically coupled telephone automatic dialing device (ACTADD) in which the application of this analog telephone signal production method results in an extremely compact and versatile product. The invention further describes a solution for reliable acoustic coupling, as well as certain user friendly features for an ACTADD. Another device described is an enhanced capability "smart phone"/answering machine with caller controlled calling party identification (CPID) capabilities, using no synthesized tone dialer chips, nor any modem FSK circuitry usually associated with such capabilities. The invention further describes how this analog telephone signal production method can be used in a telephone central office, to provide a single source for most required analog telephone signal types, and the ability to customize these signals to suit a subscribers' particular needs.
|
