| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To deal with a change in setting of a transmission unused identifier. <P>SOLUTION: In a communication system, a first identifier conversion repeater is provided with a relay disconnecting part for monitoring the transmission unused identifier and disconnecting relay of a protocol data unit having, a header part, a transmission unused identifier other than a preset opened identification number. When a first communication terminal transmits a request for a call setting with a second communication terminal being an incoming call destination, a relay management device arranged in a global identifier network or in a private identifier network sets the value of a transmission unused identifier as an opened identification number in the relay disconnecting part in a private identifier that is included in a payload part of a protocol data unit transmitted by the first communication terminal and designates a transmission source. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
