Patent ID: 7012920

Claim:
A communication connecting device connected at one end to a first terminal unit and connected at the other end to a second terminal unit via an IP network, and selectively operable with a plurality of communication standards adaptive to said first terminal unit, said second terminal unit and said IP network for thereby implementing real-time communication, said device comprising: a terminal unit control circuit for storing data received from the first terminal unit or the second terminal unit, and controlling said first terminal unit in accordance with a first communication standard; a first storage storing size information representative of a size of data to be coded; a coding/decoding circuit for collectively coding the data in accordance with the size information read out of said first storage and the first communication standard or decoding coded data received from the second terminal unit in accordance with said first communication standard and determining whether said coded data decoded is a response to data sent from the first terminal unit or retransmitted data; a second storage for storing the coded data against a loss of the coded data output from said coding/decoding circuit; an information adding/separating circuit for filtering, when adding a header and data for making up for the loss of the coded data to the coded data in accordance with a second communication standard that relates to the IP network, said data in response to a response detection signal output from said coding/decoding circuit and representative of the response or separating coded data from data received from the second terminal unit and feeding said coded data separated to said coding/decoding circuit; and an interfacing circuit for converting the coded data input via said information adding/separating circuit to a signal based on a command or converting a signal received from the second terminal unit to the coded data.