Network connection technique in VoiP network system
First Claim
1. A network connection device for connecting an IP (Internet Protocol) network and a switched telephone network, comprising:
- an IP network interface to the IP network;
a line interface to the switched telephone network;
a plurality of conversion processors, each of which performs conversion between data on the switched telephone network and an IP packet on the IP network;
a layer-4 switch connected between the IP network interface and the plurality of conversion processors, for forwarding an IP packet received from the IP network interface to a selected one of the plurality of conversion processors depending on a result of analyzing the IP packet at layer 4; and
a multiplexer for multiplexing data received from the plurality of conversion processors to output a data stream to the line interface.
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Abstract
A network connection device allowing high-speed data conversion to ensure sufficiently high throughput is disclosed. The network connection device Includes a plurality of conversion processors and a layer-4 switch. The layer-4 switch forwards an incoming IP packet to a selected one of the plurality of conversion processors depending on a result of analyzing the IP packet at layer4. Therefore, the processing of data packet and the processing of control packet can be performed in parallel by the plurality of conversion processors, resulting in high-speed packet transfer.
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Citations
15 Claims
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1. A network connection device for connecting an IP (Internet Protocol) network and a switched telephone network, comprising:
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an IP network interface to the IP network;
a line interface to the switched telephone network;
a plurality of conversion processors, each of which performs conversion between data on the switched telephone network and an IP packet on the IP network;
a layer-4 switch connected between the IP network interface and the plurality of conversion processors, for forwarding an IP packet received from the IP network interface to a selected one of the plurality of conversion processors depending on a result of analyzing the IP packet at layer 4; and
a multiplexer for multiplexing data received from the plurality of conversion processors to output a data stream to the line interface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A control method for a network connection device connecting an IP (Internet Protocol) network and a switched telephone network, the network connection device comprising:
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an IP network interface to the IP network;
a line interface to the switched telephone network; and
a plurality of conversion processors, each of which performs conversion between data on the switched telephone network and an IP packet on the IP network, the method comprising the steps of;
a) analyzing an IP packet received from the IP network interface at layer 4;
b) forwarding the IP packet to a selected one of the plurality of conversion processors depending on a result of the step (a); and
c) converting the IP packet to data on the switched telephone network by the selected conversion processor. - View Dependent Claims (10, 11, 12)
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13. A network system comprising:
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an IP (Internet Protocol) network;
a switched telephone network including a service switching point;
a SS7 (signaling system No.
7) gateway allowing the service switching point to exchange SS7 signals;
a call agent; and
a voice over IP (VoIP) gateway for connecting the IP network and the switched telephone network, wherein the VoIP gateway comprises;
an IP network interface to the IP network;
a line interface to the switched telephone network;
a plurality of conversion processors, each of which performs conversion between data on the switched telephone network and an IP packet on the IP network;
a layer-4 switch connected between the IP network interface and the plurality of conversion processors, for forwarding an IP packet received from the IP network interface to a selected one of the plurality of conversion processors depending on a result of analyzing the IP packet at layer 4; and
a multiplexer for multiplexing data received from the plurality of conversion processors to output a data stream to the line interface. - View Dependent Claims (14, 15)
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Specification