The present invention provides telephone line subscribers the benefits of simultaneous ringing service without wasting telephone network resources. When a simultaneous ringing service subscriber's wireline telephone (the primary telephone) receives an incoming call, a service switching point connected...http://www.google.es/patents/US7688962?utm_source=gb-gplus-sharePatente US7688962 - Method and system for preserving service node resources and reducing clipping effect
Method and system for preserving service node resources and reducing ...
