发明名称 |
Voice over internet protocol telephone system and method |
摘要 |
An Internet Protocol telephone system and method uses a telephone (26) to place and receive voice over Internet Protocol (VoIP)-based telephone calls and public switched telephone network (PSTN)-based telephone calls. An off-hook condition with the telephone (26) is detected and a sequence of signals generated by the telephone (26) is received. At least a first signal generated by the telephone (26) is buffered while the system attempts to detect a predetermined signal that signifies a VoIP-based call. Upon detection of the predetermined signal, the system intercepts subsequent signals in the sequence, absent the at least first signal that was buffered, and places the VoIP-based call via an internet (12). Otherwise, the system places the PSTN-based call via a PSTN (16).
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申请公布号 |
US6141341(A) |
申请公布日期 |
2000.10.31 |
申请号 |
US19980150427 |
申请日期 |
1998.09.09 |
申请人 |
MOTOROLA, INC. |
发明人 |
JONES, WESLEY STUART;COTTON, TIMOTHY;HOLLAND, ROBERT VICTOR |
分类号 |
H04L29/08;H04L12/28;H04M1/253;H04M1/725;H04M3/00;H04M3/428;H04M3/53;H04M3/537;H04M7/00;H04M11/00;(IPC1-7):H04L12/66 |
主分类号 |
H04L29/08 |
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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