ATM-WAN audio communication selecting system
AssigneeFujitsu Limited
InventorShinichiro Matsuo
Life of this patent
Estimating the term…
Abstract
An AWN (#1) extracts a destination PBX node number from destination address information included in an N-ISDN SETUP message received from a PBX, decides the type of an audio CODEC corresponding to the PBX node number, and selects an audio CODEC corresponding to the type. An AWN (#2) extracts destination PBX node number from destination address information included in an N-ISDN SETUP message received from an AWN (#1), decides the type of an audio CODEC corresponding to the PBX node number, and selects an audio CODEC corresponding to the type. Thus, an audio CODEC is selected corresponding to a destination route. Consequently, a digital one-link connection is accomplished.
Claims13
A broad band—narrow band connection node unit for communicating digital data between a narrow band network and a broad band network in an encoding/decoding format that is the same as an encoding/decoding format used on a communication route in the narrow band network in an integrated network composed of the broad band network and the narrow band network, comprising:
- at least one encoding/decoding unit having a digital one-link function that causes compressed digital data to be passed or to be decompressed only at a communication termination point depending on a setting of the compressed digital data so as to prevent a quality of the digital data from deteriorating;
- an individual encoding/decoding format managing unit storing the relation between each destination route in the narrow band network and formats of said encoding/decoding unit used on each destination route;
- and
- an encoding/decoding unit selecting unit asking said individual encoding/decoding format managing unit the format of the encoding/decoding unit corresponding to the destination route information included in signaling data and selecting one of said encoding/decoding unit corresponding to the obtained format.
A broad band—narrow band connecting method for communicating digital data between a narrow band network and a broad band network in an encoding/decoding format that is the same as an encoding/decoding format used on a communication route in the narrow band network in an integrated network composed of the broad band network and the mow band network, comprising:
- disposing at least one encoding/decoding unit having a digital one-link function that causes compressed digital data to be passed or to be decompressed only at a communication termination point depending on a setting of the compressed digital data so as to prevent a quality of the digital data from deteriorating;
- storing the relation between each destination route in the narrow band network and the format of the encoding/decoding unit used on each destination route;
- asking the format of the encoding/decoding unit corresponding to the destination route information included in signaling data and selecting one of the encoding/decoding unit corresponding to an obtained format;
- when the format of the encoding/decoding unit used in the narrow band network is changed during the digital data communication, exchanging the format information of the encoding/decoding unit that was changed so as to change an encoding/decoding unit used in a broad band—narrow band connection node unit and the destination side broad band—narrow band connection node unit to said encoding/decoding unit corresponding to the exchanged format information;
- and
- transmitting the format information with a facility information element included in a narrow band signaling message.
The broad band—narrow band connecting method as set forth in clam 7, further comprising:
- when the format of the encoding/decoding unit used in the narrow band network is changed during the digital data communication, causing the broad band—narrow band connection node unit and the destination side broad band—narrow band connection node unit to exchange a format information of the encoding/decoding unit that was changed so as to change the encoding/decoding unit used in the broad band—narrow band connection node unit and the destination side broad band—narrow band connection node unit to the encoding/decoding unit corresponding to the format information.
A broad band—narrow band connection node unit for communicating digital data between a narrow band network and a broad band network in an encoding/decoding format that is the same as an encoding/decoding format used on a communication route in the narrow band network in an integrated network composed of the broad band network and the narrow band network, comprising:
- at least one encoding/decoding means having a digital one-link function that causes compressed digital data to be passed or to be decompressed only at a communication termination point depending on a setting of the compressed digital data so as to prevent a quality of the digital data from deteriorating;
- individual encoding/decoding format managing means for storing the relation between each destination route in the narrow band network and the formats of said encoding/decoding means used on each destination route;
- and
- encoding/decoding means selecting means for asking said individual encoding/decoding means corresponding to the destination route information included in signaling data and selecting one of said encoding/decoding means corresponding to an obtained format;
- wherein
- after the broad band—narrow band connection node unit that is directly connected to a route selecting unit in the narrow band network selects one of said encoding/decoding means corresponding to a destination route in the narrow band network, the broad band—narrow band connection node unit informs a destination side broad band—narrow band connection node unit of format information of the selected one of said encoding/decoding means and the destination side broad band—narrow band connection node unit selects one of said encoding/decoding means corresponding to the informed format information;
- the broad band—narrow band connection node that is directly connected to the route selecting unit in the narrow band network selects one of said encoding/decoding means corresponding to the format information of said encoding/decoding means used in the destination route and received from the route selecting unit;
- the format information is received as a lower layer matching information element included in a narrow band signaling message;
- when the format of said encoding/decoding means used in the narrow band network is changed during the digital data communication, the broad band—narrow band connection node unit and the destination side broad band—narrow band connection node unit exchange the format information of the said encoding/decoding means that was changed so as to change said encoding/decoding means used in the broad band—narrow band connection node unit and the destination side broad band—narrow band connection node unit to said encoding/decoding means corresponding to the format information;
- and
- the format information is transmitted with a facility information element included in a narrow band signaling message.
Dependencies are inferred from the claim text.