Telephony communication via varied redundant networks
First Claim
1. A method of voice communication between two terminals including the steps of:
- establishing a voice communication link between said terminals via a first packet network;
communicating by voice between said terminals over said link;
monitoring a parameter of said communication; and
establishing a second voice communication link between said terminals via a second packet network when said monitored parameter departs from a predetermined value;
wherein said terminals are connected to said first and second voice communication links via a switched network andwherein said second packet network comprises a control network for said switched network.
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0 Petitions
Accused Products
Abstract
A switched telephone network is arranged in a manner to enable packet voice communication between telephone teyminals via multiple redundant packet switched networks. The packet switched networks may utilize different protocols, be operated by different entities, and have primary functions other than voice communication. One example of such a network may be internetworked networks, such as the Internet. One example of an alternate packet switched network may be a network whose primary function is control of a circuit switched telephone network. The common channel interoffice switching system (CCIS) of a public switched telephone network (PSTN) is a preferred example.
A voice communication link may be established from telephone terminal to telephone terminal via the Internet, the quality of voice communication may be monitored, and the link may be transferred to the common channel interoffice signaling network if and when the quality of voice communication deteriorates beneath a pre-established norm. There is provided a means for monitoring the links of the common channel interoffice signaling system carrying the packetized voice communication and collecting the information needed to permit chargin'"'"'g for the voice communication by time duration or by cells used to carry the packetized voice signal. The customer may be provided with the option of establishing the norm for diversion of the communication, or may elect which path is to be selected as the primary path.
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Citations
16 Claims
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1. A method of voice communication between two terminals including the steps of:
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establishing a voice communication link between said terminals via a first packet network; communicating by voice between said terminals over said link; monitoring a parameter of said communication; and establishing a second voice communication link between said terminals via a second packet network when said monitored parameter departs from a predetermined value; wherein said terminals are connected to said first and second voice communication links via a switched network and wherein said second packet network comprises a control network for said switched network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of voice communication between two terminals including the steps of:
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establishing a voice communication link between said terminals via a first packet network; communicating by voice between said terminals over said link; monitoring a parameter of said communication; and establishing a second voice communication link between said terminals via a second packet network when said monitored parameter departs from a predetermined value; wherein said terminals are connected to said first and second voice communication links via a switched network and wherein said second packet network comprises a common channel signaling system for said switched network. - View Dependent Claims (10)
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11. A communication system comprising in combination a switched telephone network having spaced switching systems connected to terminals, a packet switched control network connected to said switched telephone network for controlling said switched telephone network, and a public packet switched network connectable to said switching systems, wherein voice communication between two terminals connected to said switched telephone network is diverted from a voice link that includes said public packet switched network to a voice link that includes said packet switched control network.
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12. A communication system comprising in combination a switched telephone network having spaced switching systems connected to terminals, a packet switched control network controlling said switched telephone network, and a second packet switched network connectable to said switching systems, wherein said terminals are connected sequentially to said packet switched networks for voice communication between said terminals via said packet switched networks;
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wherein said terminals are connected to said second packet switched network and voice communication conducted via said second packet switched network and then connected to said packet switched control network and voice communication conducted via said packet switched control network. - View Dependent Claims (13, 14, 15, 16)
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Specification