Patent ID: 6801522
Filing Date: 2004-10-05
Classification: H04M

Abstract:
In a communications system having a line from a subscriber device, connected to a global communications network, through a branch point of the line at an input side of a switching station which provides telephone services to the subscriber device, a method of telephone-communicating with said subscriber device utilizing a first access device connected to a calling subscriber device and located between the branch point and the global communication network, the first access device having address translation means for translating between a subscriber identifier and a global IP address, a calling-out means for translating between a calling-out control signal and a calling-out packet, and a voice translation means for translating between a voice signal and voice packets;the method comprising the steps of; converting, by means of the address translation means of the first access device, the subscriber identifier of a called subscriber device, input by the calling subscriber device, to a global IP address; translating, by means of a calling-out means of the first access device, from the calling-out control signal received from the calling subscriber device through the line and the branch point, to the calling-out packet; routing the calling-out packet for calling out the called subscriber device, using the global IP address thus obtained, to a second access device connected to the called subscriber device through; a branch point and a line; translating, by means of a calling-out means of the second access device, the calling-out packet thus routed, to a calling-out control signal for transferring the same to the called subscriber device; translating, by means of a voice translation means of the first access device, from a voice signal to telephone talk packets; routing, with the global IP address thus obtained, one or more telephone talk packets to be sent to the called subscriber device, to the second access device through the global communications network; and translating, by means of a voice translation means of the second access device, from the telephone talk voice packets thus routed, to a voice signal for transferring the same to the called subscriber device through the branch point and the line, after calling out.