Switch with emulation client
First Claim
1. A method for establishing telephonic communication between a first device and a second device over a communication network adhering to a session initiation protocol (SIP), the method comprising:
- receiving a first call establishment message from the first device in a SIP-unobservant format;
generating a second call establishment message in a SIP-observant format in response to the first call establishment message; and
transmitting the second call establishment message to the second device over the communication network.
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Accused Products
Abstract
A switch with emulation client in a data communication network adhering to a Session Initiation Protocol (SIP) . The switch is coupled to a legacy telephone which initiates or receives telephonic communication with a SIP-observant telephone or another legacy telephone over the SIP-observant network. The emulation client translates between PBX and SIP messages to allow the legacy telephone to communicate seamlessly over the SIP observant network. The switch is further coupled to a location server which storing redirection information for redirecting calls made to a particular number. The calls are preferably redirected based on the location where the user is scheduled to be at the time of the call.
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Citations
36 Claims
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1. A method for establishing telephonic communication between a first device and a second device over a communication network adhering to a session initiation protocol (SIP), the method comprising:
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receiving a first call establishment message from the first device in a SIP-unobservant format;
generating a second call establishment message in a SIP-observant format in response to the first call establishment message; and
transmitting the second call establishment message to the second device over the communication network. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for establishing telephonic communication between a first device and a second device over a communication network adhering to a session initiation protocol (SIP), the method comprising:
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receiving a first call establishment message from the first device in a SIP-observant format;
generating a second call establishment message in a SIP-unobservant format in response to the first call establishment message; and
transmitting the second call establishment message to the second device over the communication network. - View Dependent Claims (8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 20, 21, 22, 23, 24, 26, 27, 28, 29, 30, 32, 33, 34, 35, 36)
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13. A communication network adhering to a session initiation protocol (SIP) for establishing telephonic communication between devices, the network comprising:
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a SIP-unobservant device;
a SIP-observant device; and
an emulation client operative between the SIP-unobservant device and the SIP-observant device, characterized in that a call establishment message transmitted by the SIP-unobservant device in a SIP-unobservant format is converted to a SIP-observant format by the emulation client and transmitted to the SIP-observant device.
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19. A communication network adhering to a session initiation protocol (SIP) for establishing telephonic communication between devices, the network comprising:
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a SIP-unobservant device;
a SIP-observant device; and
an emulation client operative between the SIP-unobservant device and the SIP-observant device, characterized in that a call establishment message transmitted by the SIP-observant device in a SIP-observant format is converted to a SIP-unobservant format by the emulation client and transmitted to the SIP-unobservant device.
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25. An emulation client in a communication network adhering to a session initiation protocol (SIP) for establishing telephonic communication between a SIP-observant device and a SIP-unobservant device, characterized in that a call establishment message transmitted by the SIP-observant device in a SIP-observant format is converted to a SIP-unobservant format by the emulation client and transmitted to the SIP-unobservant device.
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31. An emulation client in a communication network adhering to a session initiation protocol (SIP) for establishing telephonic communication between a SIP-observant device and a SIP-unobservant device, characterized in that a call establishment message transmitted by the SIP-unobservant device in a SIP-unobservant format is converted to a SIP-observant format by the emulation client and transmitted to the SIP-observant device.
Specification