Network switching system with asynchronous and isochronous interface
First Claim
Patent Images
1. A system comprising:
- an extension node configured to receive and transmit voice signals; and
a gateway connected to the extension node via a serial bus and configured to;
receive a call for the extension node from a device via an outside network,secure a bidirectional isochronous channel in response to receiving the call, andsend a channel number corresponding to the secured isochronous channel to the extension node via the serial bus to establish the call between the extension node and the device.
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Abstract
A switching system may include a gateway node connected with ISDN (Integrated Services Digital Network) and PSTN (Public Switched Telephone Network), and one or more extension nodes, and a serial bus such as IEEE 1394 bus. The gateway node may transform the data rate of an outside line into a data rate of the extension node, and vice versa, and secure a seamless communication channel. The gateway node may secures an isochronous channel, according to a request from the extension nodes or the outside line, and may executes switching such as transfer or reservation. A resource manager may hold a table for managing the gateway node and extension node.
16 Citations
14 Claims
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1. A system comprising:
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an extension node configured to receive and transmit voice signals; and a gateway connected to the extension node via a serial bus and configured to; receive a call for the extension node from a device via an outside network, secure a bidirectional isochronous channel in response to receiving the call, and send a channel number corresponding to the secured isochronous channel to the extension node via the serial bus to establish the call between the extension node and the device. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An information terminal comprising:
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a telephone interface configured to transmit and receive a telephone signal through a serial bus; a television set interface configured to receive a television signal through the serial bus; and a bus manager configured to control the serial bus, the bus manager including a first asynchronous interface and a first isochronous interface for the telephone signal and a second asynchronous interface and a second isochronous interface for the television signal.
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9. A gateway comprising:
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a telephone gateway configured to; transfer telephone signals from a telephone network to at least one telephone terminal via a serial bus, and transfer telephone signals from the serial bus to the telephone network; a television gateway configured to; receive a television signal from an external television line, and cause the television signal to be transferred via the serial bus; and a bus manager connected to the telephone gateway, the television gateway, and the serial bus, the bus manager including a first asynchronous interface and a first isochronous interface for transferring the telephone signal and a second asynchronous interface and a second isochronous interface for transferring the television signal.
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10. A call-in signal processing method in a system that includes a gateway and a plurality of extension nodes, the gateway and the plurality of extension nodes being connected via a serial bus, the method comprising:
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selecting, at the gateway, one of an automatic transfer by a number display, a global call-in, or a manual call-in on the basis of setup data; calling, via the gateway, one or more extension nodes of the plurality of extension node by the selected one of an automatic transfer by a number display, a global call-in, or a manual call-in on the basis of setup data; sending responses from the one or more extension nodes; securing, via the gateway, one or more isochronous channels based on responses from the one or more extension nodes; allowing the one or more extension nodes to start exchanging data via the one or more isochronous channels; and sending, via the gateway, a call status of an extension node of the one or more extension nodes of which call status is changed to the plurality of extension nodes connected to the serial bus. - View Dependent Claims (11)
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12. A call-out signal processing method in a system that includes a gateway and a plurality of extension nodes, the gateway and the plurality of extension nodes being connected via a serial bus, the method comprising:
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receiving, at the gateway, a call from a first extension node of the plurality of extension nodes to a second extension node of the plurality of extension nodes; confirming, at the gateway, a call status of the second extension node; securing a first isochronous channel for transmission; sending the call status to at least one other extension node of the plurality of extension nodes connected to the serial bus; securing a second isochronous channel for reception; and allowing the first extension node and the second extension node to start exchanging data via the first and second isochronous channels. - View Dependent Claims (13, 14)
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Specification