Patent ID: 7471785
Filing Date: 2008-12-30
Classification: H04M

Abstract:
1. An outside incoming call transfer control method for controlling an incoming call transfer from an originating terminal to an outside line of a transfer destination set in a transfer source terminal, when the transfer source terminal receives a call incoming from the originating terminal, wherein the originating terminal is accommodated in a first private branch exchange (PBX), the transfer source terminal is accommodated in a second PBX and having a setting of an incoming call transfer to the outside line of the transfer destination, the outside line of the transfer destination is accommodated in a third PBX, and the first, second, and third PBXs are network-connected via a network, said method comprising the steps of: wherein the transfer information includes: first data corresponding to the number of PBXs having passed the transfer instruction signals, and second data corresponding to the number of PBXs having passed the transfer instruction signal when a route of the transfer instruction signal in a transmission direction differs from a route of said transfer source terminal in an outside originating direction; wherein said step (ii) includes the steps of: (a) incrementing a numeric value of the first data by one upon receiving the transfer instruction signal, (b) determining whether the route of the transfer instruction signal in the transmission direction differs from the route of the transfer source terminal in the outside originating direction on the basis of predetermined routing information, and (c) setting the numeric value of the first data as a numeric value of the second data if it is determined that the above two routes differ from each other; and wherein the step of (iii) includes the steps of: (a) incrementing the numeric value of the first data by one upon receiving the transfer instruction signal, and (b) identifying, as the third PBX, a PBX located away by the number of the PBXs equivalent to a calculated difference between both the numeric values of the first data and the second data in the opposite direction to the transfer instruction signal receiving direction.