Methods and apparatus for maintaining connectivity with an internet protocol phone operating behind a firewall
First Claim
1. A method for a switch to maintain connection with an Internet protocol phone operating behind a firewall, the method comprising:
- registering the Internet protocol phone in response to receiving a first registration request from the Internet protocol phone, the first registration request including first registration information, the first registration information including a first public Internet protocol address associated with the firewall;
storing the first registration information;
reregistering the Internet protocol phone in response to receiving a second registration request from the Internet protocol phone due to the firewall experiencing a public Internet protocol address change, the second registration request including second registration information different from the first registration information, the second registration information including a second public Internet protocol address associated with the firewall, the second public Internet protocol address being different from the first public Internet protocol address; and
in response to detecting a failure associated with call processing for the Internet protocol phone after the reregistering of the Internet protocol phone using the second registration information, reverting to the stored first registration information to process calls associated with the Internet protocol phone.
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0 Petitions
Accused Products
Abstract
Methods and apparatus for maintaining connectivity with an Internet protocol (IP) phone operating behind a firewall are disclosed. An example method disclosed herein comprises registering the IP phone in response to receiving a first registration request from the IP phone, the first registration request including first registration information, the first registration information including a first public IP address associated with the firewall, storing the first registration information, reregistering the IP phone in response to receiving a second registration request from the IP phone, the second registration request including second registration information, the second registration information including a second public IP address associated with the firewall, the second public IP address different from the first public IP address, and reverting to the stored first registration information to process calls associated with the IP phone.
18 Citations
20 Claims
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1. A method for a switch to maintain connection with an Internet protocol phone operating behind a firewall, the method comprising:
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registering the Internet protocol phone in response to receiving a first registration request from the Internet protocol phone, the first registration request including first registration information, the first registration information including a first public Internet protocol address associated with the firewall; storing the first registration information; reregistering the Internet protocol phone in response to receiving a second registration request from the Internet protocol phone due to the firewall experiencing a public Internet protocol address change, the second registration request including second registration information different from the first registration information, the second registration information including a second public Internet protocol address associated with the firewall, the second public Internet protocol address being different from the first public Internet protocol address; and in response to detecting a failure associated with call processing for the Internet protocol phone after the reregistering of the Internet protocol phone using the second registration information, reverting to the stored first registration information to process calls associated with the Internet protocol phone. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A tangible machine readable storage device storing machine readable instructions which, when executed, cause a machine to perform operations comprising:
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registering an Internet protocol phone operating behind a firewall with a switch in response to receiving a first registration request from the Internet protocol phone, the first registration request including first registration information, the first registration information including a first public Internet protocol address associated with the firewall; storing the first registration information; reregistering the Internet protocol phone in response to receiving a second registration request from the Internet protocol phone due to the firewall experiencing a public Internet protocol address change, the second registration request including second registration information different from the first registration information, the second registration information including a second public Internet protocol address associated with the firewall, the second public Internet protocol address being different from the first public Internet protocol address; and in response to detecting a failure associated with call processing for the Internet protocol phone after the reregistering of the Internet protocol phone using the second registration information, reverting to the stored first registration information to process calls associated with the Internet protocol phone. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A switch to maintain connection with an Internet protocol phone operating behind a firewall, the switch comprising:
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a memory having machine readable instructions stored thereon; and a processor to execute the instructions to perform operations comprising; registering the Internet protocol phone in response to receiving a first registration request from the Internet protocol phone, the first registration request including first registration information, the first registration information including a first public Internet protocol address associated with the firewall; storing the first registration information in the memory; reregistering the Internet protocol phone in response to receiving a second registration request from the Internet protocol phone due to the firewall experiencing a public Internet protocol address change, the second registration request including second registration information different from the first registration information, the second registration information including a second public Internet protocol address associated with the firewall, the second public Internet protocol address being different from the first public Internet protocol address; and in response to detecting a failure associated with call processing for the Internet protocol phone after the reregistering of the Internet protocol phone using the second registration information, reverting to the first registration information stored in the memory to process calls associated with the Internet protocol phone. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification