| 摘要 |
The present invention PCM (phone computing machine) uses general purpose programmable device ( 101 ) as its core. Line-end interface ( 201 ), includes RJ11 jack ( 210 ), DAA ( 212 ) and CODEC ( 214 ), connects to telephone line. User-end interface ( 301 ), in one embodiment includes RJ11 jack ( 310 ), SLIC ( 312 ) and CODEC ( 314 ) connects to user apparatus/networks/systems. The functionality of PCM is defined when a portable data storage device with application software is plugged in the machine's external memory interface ( 401 ). PCM's great flexibility and low cost will open up new frontier in the telephone system. In addition, a general method similar as PCM can be applied to other cost-effective information processing applications between predetermined information sources. Examples are voice application in microphone system, audio/video processing in home entertain systems.
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