Abstract: A communication method between an IP terminal and a client is provided to simplify a task for installing an IP terminal in an IP network by improving a communication method between the client and the IP terminal, a communication method between an IP terminal and a client over an IP network without the port mapping or port forwarding of an IP sharer, and a communication method between an IP terminal and a client, which enables even an ordinary person without specialized knowledge to install the IP terminal because the port mapping or port forwarding of an IP sharer is not performed.

Abstract: Provided is a door lock system, which can control a door lock using a user's own terminal without regard to kinds of the user's terminal and mobile service providers that the user's terminal has been registered. The door lock system includes: an entrance door provided at one side of a building; a door lock provided at one side of the entrance door for controlling opening and closing of the entrance door; and a terminal for providing a communication signal to the door lock through communication with the door lock.

Abstract: A process for preparing pyrimidinone compound and salts thereof The method of the present invention enables the convenience to produce the pyrimidinone derivatives in high yields, which pyrimidinone compounds are useful for treating cardiovascular diseases caused by binding angiotensin II to its receptors, through antagonistic activity against angiotensin II receptors.

Abstract: A process for preparing pyrimidinone compound and salts thereof The method of the present invention enables the convenience to produce the pyrimidinone derivatives in high yields, which pyrimidinone compounds are useful for treating cardiovascular diseases caused by binding angiotensin II to its receptors, through antagonistic activity against angiotensin II receptors.