发明授权
- 专利标题： Method for DTMF transfer by RTP
- 专利标题（中）： RTP转发DTMF方式
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申请号： US11214863申请日： 2005-08-31
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公开(公告)号： US07778243B2公开(公告)日： 2010-08-17
- 发明人: Yoshie Yamaguchi , Masahito Hirokawa , Makoto Kumada , Yusuke Sato , Masayuki Ono
- 申请人： Yoshie Yamaguchi , Masahito Hirokawa , Makoto Kumada , Yusuke Sato , Masayuki Ono
- 申请人地址： JP Tokyo
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Antonelli, Terry, Stout & Kraus, LLP.
- 优先权： JP2004-350224 20041202; JP2005-235277 20050815
- 主分类号： H04L12/66
- IPC分类号： H04L12/66
摘要：
A method for DTMF transmission between different address systems in a communication system containing a first network (NW) 20A including an SIP terminal 41A connected to an SIP server 30A, a second network (NW) 20B including an SIP terminal 41B connected to an SIP server 30B, and an SIP converter 10 connecting the first and the second NWs. When the SIP converter 10 detects coded DTMF information from one of the NWs while a session is established between the SIP terminal 41A and the SIP terminal 41B, the SIP converter 10 determines whether the other of the NWs supports the coded DTMF information. If the other of the NWs does not support the coded DTMF information, the SIP converter 10 stores voice-data DTMF corresponding to the coded DTMF information into a payload of RTP and transfers the information to the SIP terminal of the other network.
公开/授权文献
- US20060120344A1 Method for DTMF transfer by RTP 公开/授权日：2006-06-08