Patent ID: 8005201
Filing Date: 2011-08-23
Classification: H04M,H04Q

Abstract:
1. A method for protecting call with coloring ring back tone in an intelligent network, wherein said intelligent network includes an intelligent network service control point (SCP), a service switch point (SSP), and an intelligent peripheral (IP), comprising the following steps of: Step 1, adding an IP state-detecting module to the IP to detect whether the IP is available; Step 2, sending a state-checking request to the IP by the IP state-detecting module to check whether the IP is available; Step 3, directing the SSP by the intelligent network SCP to connect the call to the IP if the IP returns a result that the IP is available; and Step 4, supporting the SSP to connect to a called subscriber directly rather than to the IP by the intelligent network SCP if the IP returns a result that the IP is unavailable, or returns no detection result of the IP state on time.