Communications device and method of operating a communications device that continues to connect local users after a link fails
First Claim
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1. A communications device comprising:
- a memory to store a plurality of dialed numbers; and
a state machine connected to the memory, the state machine to determine a link status after a dialed number has been received, determine whether the dialed number is stored in the memory when the link status indicates that a link is unavailable, command that an indication be output that a connection can not be made at this time when the dialed number is absent from the memory and the link status indicates that the link is unavailable, and command that a connection be made between a first user device and a second user device when the dialed number is one of the plurality of dialed numbers stored in the memory and the link status indicates that the link is unavailable.
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Abstract
A next-generation network utilizes a three-tier, cascading fault approach to providing emergency stand-alone (ESA) switching in a circuit-to-packet (C2P) network. Calls that are placed to destination numbers which are connected to the same local network device are completed even when connectivity with a community network level has been interrupted, while calls that are placed to destination numbers which are connected to the same community are completed even when connectivity with a gateway media controller has been interrupted.
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Citations
22 Claims
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1. A communications device comprising:
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a memory to store a plurality of dialed numbers; and
a state machine connected to the memory, the state machine to determine a link status after a dialed number has been received, determine whether the dialed number is stored in the memory when the link status indicates that a link is unavailable, command that an indication be output that a connection can not be made at this time when the dialed number is absent from the memory and the link status indicates that the link is unavailable, and command that a connection be made between a first user device and a second user device when the dialed number is one of the plurality of dialed numbers stored in the memory and the link status indicates that the link is unavailable. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A communications device comprising:
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a local switching circuit to be directly connected to a plurality of user devices; and
a state machine connected to the local switching circuit, the state machine to determine a link status after a dialed number has been received from a first user device of the plurality of user devices, command the local switching circuit to output an indication to the first user device that a connection can not be made at this time when the dialed number does not represent one of the plurality of user devices and the link status indicates that a link is unavailable, and command the local switching circuit to make a connection between the first user device and a second user device when the dialed number represents one of the plurality of user devices and the link status indicates that the link is unavailable. - View Dependent Claims (9, 10, 11)
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12. A method of operating a communications device comprising:
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detecting a dialed number that was generated by a first user device, the dialed number identifying a second user device;
determining a link status;
commanding that an indication be output to the first user device that a connection can not be made at this time when the first user device is connected by way of one of a number of downstream links, the second user device is connected by way of an upstream link, and the link status indicates that the upstream link is unavailable; and
commanding that a connection be made between the first user device and the second user device when the first user device is connected by way of one of the number of downstream links, the second user device is connected by way of one of the number of downstream links, and the link status indicates that the upstream link is unavailable. - View Dependent Claims (13, 14, 15, 16)
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17. A method of operating a communications device comprising:
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determining a link status after a dialed number has been received from one of a plurality of user devices;
commanding that an indication be output that a connection can not be made at this time when the dialed number does not represent one of the plurality of user devices and the link status indicates that a link is unavailable, and commanding that a connection be made between a first user device and a second user device when the dialed number represents one of the plurality of user devices and the link status indicates that the link is unavailable. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification