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发明名称
Maintaining accessibility for SIP clients behind NAT firewalls using intermediary proxy, UDP/TCP conversion and keep alive messages
摘要
申请公布号
GB2443238(A)
申请公布日期
2008.04.30
申请号
GB20060020349
申请日期
2006.10.16
申请人
发明人
JAMES HOLDEN;ADAM BEAUMONT
分类号
H04L29/06
主分类号
H04L29/06
代理机构
代理人
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