Patent ID: 6751215
Filing Date: 2004-06-15
Classification: H04Q

Abstract:
An audio band signal transmission system having an audio transmission system which is arranged between a switching system and a cell switching system, and transmits an audio band signal comprising a plurality of audio band signal cells via an up line from the cell switching system to the switching system and a down line from the switching system to the cell switching system for each one of a plurality of connections, and has a cell delay variation absorbing buffer for delayed-reading the audio band signal which is transmitted via the up line, comprising, for each of said plurality of connections:a connection identification number inserting portion of the audio transmission system for setting a connection identification number which identifies the connection, and for inserting said connection identification number into an audio band signal cell which is to be transmitted to the switching system via the up line for the connection; a connection identification number detecting portion of the audio transmission system for detecting the connection identification number contained in the audio band signal cell which is to be transmitted from the switching system via the down line for the connection; and a routine correcting portion of the audio transmission system for correcting a routine before the audio band signal cell, which is transmitted to the switching system via the up line for the connection in response to a predetermined control signal, is input into the connection identification number inserting portion corresponding to the connection, to thus transmit the audio band signal cell via the down line corresponding to the connection without intervention of the switching system and the cell delay variation absorbing buffer;wherein, when the connection identification number detecting portion of one of the plurality of connections detects another connection identification number of another one of the plurality of connections via the down line for the connection, the connection identification number detecting portion instructs the connection identification number detecting portion of the other connection to output the predetermined control signal.