| 摘要 |
<p>A system and method are presented for providing a telephone service. An analog signal is received from a telephone and the analog signal is converted into a digital signal in the first format. A modem is provided for receiving the digital signal in the first format. A digitizer is also provided for receiving the analog signal from the telephone, The system, in a first mode of operation, couples the digital signal in the first format to the modem, and in a second mode of operation, couples the analog signal from the telephone to the digitizer. The second mode of operation may be, for example, a power failure mode of operation.</p> |
