发明名称 |
Routing service method in voice over internet protocol system |
摘要 |
A routing service method in a public switched telephone network (PSTN) system uses a stand-alone gateway interworking with disparate central office lines. The stand-alone gateway checks whether a call service can be provided over the Internet with reference to an internal database having periodically updated call service state information in response to a call service request from a calling private branch exchange (PBX) connected to the stand-alone gateway via a central office line. If the call service cannot be provided over the Internet, the stand-alone gateway transmits a call service request, together with a public switched telephone network (PSTN) rerouting control request, to the calling PBX. The calling PBX transfers the call to a called party over the PSTN in response to the PSTN rerouting control request.
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申请公布号 |
GB2378085(A) |
申请公布日期 |
2003.01.29 |
申请号 |
GB20020011702 |
申请日期 |
2002.05.22 |
申请人 |
* SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
EUNG-MOON * YEOM |
分类号 |
H04L12/64;H04L12/66;H04L29/06;H04M7/00;(IPC1-7):H04M1/253 |
主分类号 |
H04L12/64 |
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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