| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a communication relay method, communication relay program and communication relay apparatus for relaying communication between a calling terminal and a called terminal via a relatively most inexpensive path at, in a mobile type dual terminal which packages therein both a WLAN and a PHS. <P>SOLUTION: When a telephone call is incoming in a state where the mobile type dual terminal packaging therein both the WLAN and PHS is located within a PHS range, a call from an S-P gateway 104 to a called terminal 102 is disconnected prior to generation of a call tariff and call-back is performed from the called terminal 102 to the S-P gateway 104 via an IP network or a PSTN (Public Switched Telephone Network). A calling terminal 101 that becomes a call-back destination is then specified by a SIP server 100 in place of the called terminal 102, thereby connecting the telephone call from the called terminal 102 to the calling terminal 101. In addition to the "call-back system", the invention presents four systems of "re-connect system", "re-connect+re-call system" and "re-call system". <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
