发明授权
- 专利标题： Low power emergency telephone mode
- 专利标题（中）： 低功率紧急电话模式
-
申请号： US320778申请日： 1994-10-11
-
公开(公告)号： US5495530A公开(公告)日： 1996-02-27
- 发明人: Joseph W. Peterson , Dale E. Gulick
- 申请人： Joseph W. Peterson , Dale E. Gulick
- 申请人地址： CA Sunnyvale
- 专利权人： Advanced Micro Devices, Inc.
- 当前专利权人： Advanced Micro Devices, Inc.
- 当前专利权人地址： CA Sunnyvale
- 主分类号： H04B7/26
- IPC分类号： H04B7/26 ; H04M1/725 ; H04M19/08 ; H04M11/02
摘要：
A cordless telephone that may be fully powered by AC main power lines and only partially powered by telephone lines includes structure for producing dual tones, structure for producing dual-tone multifrequency tones from the dual tones, and structure for empowering each of the foregoing in the event of AC main power failure where the only power available passes through the telephone lines.
公开/授权文献
信息查询
