Patent ID: 9210245
Filing Date: 2015-12-08
Classification: H04L,H04M,H04Q

Abstract:
1. A linkage system that allows a private branch exchange that is connected to a softphone terminal having a phone function to establish a call between a mobile telephone that is not accommodated in the private branch exchange and an extension telephone that is connected to the private branch exchange and that is a call destination, the linkage system comprising: a linkage information registration section that stores a number of the softphone terminal and linkage terminal information that have been received by the private branch exchange from the softphone terminal when a user of the softphone terminal seeks to establish the call between the mobile terminal and the extension telephone, the linkage terminal information including a telephone number of the mobile telephone; a call processing section that makes a call to the mobile telephone, via a public communication network that includes a public telephone network and a mobile carrier network, on the basis of the linkage terminal information of the mobile telephone in the linkage information registration section; a ring processing section that causes the extension telephone to ring when an incoming reply is received by the private branch exchange from the mobile telephone via the public communication network; a path setting section that sets a call path between the mobile telephone and the extension telephone when the private branch exchange receives a reply from the extension telephone; and a linkage status notification section that gives notification of a linkage status indicating that a call is in progress between the mobile telephone and the extension telephone to the softphone terminal.