A system for (and a method of) selectively establishing communication with one of plural devices associated with a single telephone number during a disaster or disaster recovery period. The method can offer disaster recovery to an enterprise depending upon its size, financial well-being and desired capabilities....http://www.google.de/patents/US8135410?utm_source=gb-gplus-sharePatent US8135410 - Method and apparatus for communicating with one of plural devices associated with a single telephone number during a disaster and disaster recovery
