| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an IP telephone or an IP communication instruction system for receiving simultaneous instruction broadcasting considering reduction in an effect of troubles according to SIP even if the troubles occur. <P>SOLUTION: The IP telephone 20 sequentially executes login authentication processing to respective IP communication instruction exchangers 100A, 100B, and receives simultaneous instruction broadcasting from an instruction console 10 via the IP communication instruction exchanger that has already logged in. The IP telephone 20 stores the order of priority of the IP instruction exchanger for receiving a simultaneous broadcasting instruction, and receives the simultaneous instruction broadcasting from the instruction console via the IP communication instruction exchanger having the highest order of priority according to the order of priority when login authentication to a plurality of IP communication instruction exchangers is successful by login authentication processing. <P>COPYRIGHT: (C)2011,JPO&INPIT |
