发明名称 |
DTMF tone signal transmission method and DTMF tone signal transmission system |
摘要 |
It is made possible for a DTMF tone signal associated with a button depressed on an IP telephone terminal to arrive at the opposite party even if an IP telephone terminal does not have a function of sending a DTMF tone signal. If a DTMF tone signal transmission request signal detection unit in a proxy detects a DTMF tone signal transmission request signal inserted in an RTP packet or a SIP packet received from an IP telephone terminal or detects a DTMF digit signal contained in the DTMF tone signal transmission request signal, a DTMF tone signal generation unit generates a DTMF tone signal associated with the DTMF digit signal. A voice encoder encodes the DTMF tone signal in the same way as a voice signal. An RTP payload replacement unit replaces a voice signal in a payload of the RTP packet with the encoded DTMF tone signal. |
申请公布号 |
US8311033(B2) |
申请公布日期 |
2012.11.13 |
申请号 |
US20050104484 |
申请日期 |
2005.04.13 |
申请人 |
MONAI NOBUHIRO;NEC INFRONTIA CORPORATION |
发明人 |
MONAI NOBUHIRO |
分类号 |
H04L12/56;H04L12/66;H04J3/12;H04M1/24;H04M1/253;H04M1/50;H04M3/00;H04M7/12;H04M11/00 |
主分类号 |
H04L12/56 |
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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