Communication system and method for providing information on interface connecting network components

A communication system for providing information on an interface connecting network components comprises: a plurality of user agents for collecting the interface information on the respective network components which form the communication system; a terminal for outputting the interface information on the respective network components in response to a user's request; and a call manager for receiving the interface information on the network components from the user agents through a session initiation protocol (SIP), and providing the terminal with the interface information in real time. A method of providing interface information on the network components comprises steps corresponding to the above-listed functions. Thus, the interface status and information can be exchanged between the network components using the same SIP protocol, and a disabled interface can be dealt with faster.