| 发明名称 |
Method and apparatus for testing telephone sound quality |
| 摘要 |
A method and apparatus for testing telephone sets to determine their sound quality comprising a system for repeatedly applying a sequence of pulse tones to a test telephone where the respective tone frequencies are different and within the normal human voice range.
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| 申请公布号 |
US7236573(B2) |
申请公布日期 |
2007.06.26 |
| 申请号 |
US20030403252 |
申请日期 |
2003.03.31 |
| 申请人 |
AT&T INTELLECTUAL PROPERTY, INC. |
发明人 |
BACHORIK JOHN R.;HAZELTINE JOSEPH T.;LEE DAVIN J. |
| 分类号 |
H04M1/24;H04M3/08;H04M3/22;H04M3/32;H04R29/00 |
主分类号 |
H04M1/24 |
| 代理机构 |
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