Methods and apparatus for maintaining connectivity with an internet protocol phone operating behind a firewall
US8514847B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2009 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Feb 22, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M7/006
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.