发明名称 |
Transparent call progress |
摘要 |
A cellular modem pool provides call progress information to a calling party during call setup. In particular, the cellular modem pool includes a coupling means, which communicates any signals between the cellular-side of the cellular data connection and the PSTN-side of the cellular data connection during call setup. This allows the calling party to hear the call progress on the called party side of the data call. In addition, the cellular modem pool monitors the signals for a data signal provided by the called party, e.g., a predefined answer tone. Once the answer tone is detected, the cellular modem pool opens the connection provided by the coupling means and processes the respective signals on the cellular-side and the PSTN-side of the cellular modem pool.
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申请公布号 |
US5787364(A) |
申请公布日期 |
1998.07.28 |
申请号 |
US19950380872 |
申请日期 |
1995.01.30 |
申请人 |
PARADYNE CORPORATION |
发明人 |
EXNER, JAMES WALTER;HITCHCOCK, LYNN WESLEY;JUNG, EDWARD;MATTHEWS, CRAIG |
分类号 |
H04B7/26;H04M11/06;H04W4/12;(IPC1-7):H04Q7/00;H04Q9/00 |
主分类号 |
H04B7/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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