Patent ID: 6456617
Filing Date: 2002-09-24
Classification: H04M,H04Q

Abstract:
A routing control communication system comprising:a circuit switched network including a plurality of telephone terminals and a service control information database provided with a telephone number table for storing telephone numbers of the respective telephone terminals and for corresponding between the telephone numbers of the telephone terminals and their call-transfer telephone numbers or addresses indicating other telephone numbers or addresses of the respective telephone terminals, to which incoming calls are to be transferred; an internet protocol network including a plurality of data terminals and a gatekeeper provided with an address table for storing addresses of the respective data terminals; a plurality of gateways connecting between said circuit switched network and said internet protocol network, said address table in said gatekeeper further storing addresses of the respective gateways and correspondence between telephone numbers of the telephone terminals and the addresses of the gateways to be used to connect the data terminals with the telephone terminals; and an interworking equipment connecting between said service control information database in said circuit switched network and said gatekeeper in said internet protocol network so that said gatekeeper obtains a call-transfer telephone number or address corresponding to a telephone number called from the data terminal, using said telephone number table in said service control information database.