| 摘要 |
<p>According to one embodiment, there is provided a telephone system including a plurality of exchanges interconnecting a private network each exchange including a plurality of communicating terminals and giving a local identifier to a call relative to each communication terminal belonging to each exchange; a call control application unit configured to control the call based on the local identifier; an identifier giving processing unit configured to give a global identifier commonly used among the plurality of exchanges to each call set among different exchanges through the private network; a conversion processing unit configured to convert the global identifier into the local identifier recognizable by the call control application unit; and a relay processing unit configured to give the converted local identifier to the call control application unit and enable the call control application unit to control a call having the global identifier based on the converted local identifier.</p> |
