Patent ID: 6426963
Filing Date: 2002-07-30
Classification: H04Q

Abstract:
A method for configuring a network interface circuit in an integrated services digital network keyphone system, comprising the steps of:storing, in a read only memory (ROM) of the network interface circuit, all functions programs supporting an integrated services digital network protocol for each country and each network which will be used by the keyphone system; selecting a function program corresponding to a country and a kind of network to be operated upon initialization from among the function programs stored in the ROM; and setting the selected function program as an execution functional program; wherein said initialization is executed when said keyphone system is power on reset and said network interface circuit is reset; wherein said method is carried out by software including at least one of the following modules: an application entity, a call control entity, a network signaling entity, a data link entity, and a physical entity; said method further comprising the step of receiving a country code and a network code to be currently operated from a main device of said keyphone system through the application entity by the layer management entity upon initialization; and wherein said selecting step is carried out by the call control entity, the network signaling entity, the data link entity and the physical entity, and wherein the selecting step comprises: requesting said call control entity, said network signaling entity, said data link entity and said physical entity to perform a configuration for said country code and said network code sequentially by said layer management entity; selecting a function program for said country code and said network code according to a configuration need from said layer management entity by said call control entity, said network signaling entity, said data link entity and said physical entity, from among the function programs stored in said ROM and setting the selected program as the execution functional program; and informing of configuration completion by said layer management entity through said application entity to said main device after completing the configuration of said call control entity, said network signaling entity, said data link entity, and said physical entity.