Relay-server arranged to carry out communications between communication terminals on different LANS
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United States of America Patent
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Jun 25, 2013
Grant Date -
Mar 13, 2008
app pub date -
Sep 12, 2007
filing date -
Sep 12, 2006
priority date (Note) -
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Abstract
A technique of carrying out communications between communication terminals on different LANs while realizing reductions in the burden of account control and suppression in load on a server includes first and second relay servers on first and second LANs issuing a registration request to a SIP-server, respectively. A first communication terminal on the first LAN issues a registration request to the first relay server while a second communication terminal on the second LAN issues a registration request to the second relay server. The first and second relay servers exchange account information about the registered communication terminals with each other. When the first communication terminal generates communication data addressed to the second communication terminal, the first relay server selects the second relay server as a relay based on the exchanged account information to relay the communication data. Then, the second relay server relays the communication data to the second communication terminal.
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