| 发明名称 |
Data-only telephone service |
| 摘要 |
Data-only telephone service is supported by determining if a call placed from a telephone line, designated as data-only, is to a validated data line. If not, the call is disconnected.
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| 申请公布号 |
US2002176550(A1) |
申请公布日期 |
2002.11.28 |
| 申请号 |
US20010866427 |
申请日期 |
2001.05.25 |
| 申请人 |
QWEST COMMUNICATIONS INTERNATIONAL INC. |
发明人 |
VERBIL JOHN M.;MARKS MARTIN R. |
| 分类号 |
H04M11/00;H04Q3/00;(IPC1-7):H04M11/00 |
主分类号 |
H04M11/00 |
| 代理机构 |
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代理人 |
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