Method and system for preventing call forward looping
AssigneeSprint Spectrum L.P.
InventorsCharles E. Woodson, Baoquan Zhang, Thomas M. Sladek
Life of this patent
Estimating the term…
Abstract
In a telecommunications network having switching points (such as SSPs and/or MSCs) controlled by a control point (such as an SCP), the switching points are provisioned to send messages to the control point when they encounter trigger conditions during processing of a call to a called station that has a forward-to number. When the control point receives the messages, it determines whether a loop condition exists, i.e., whether the call has already been forwarded from the forward-to number. If the control point determines that a loop condition exists, the control point instructs the switching point so as not to forward the call to the forward-to number.
Claims21
A method of preventing call forward looping in a telecommunications system having at least one switching point controlled by a control point, said method comprising:
- a switching point detecting a request to terminate a call to a called station, said called station having a forward-to number, said call originating from a calling station;
- said switching point sending at least one message to said control point, said at least one message identifying said calling station and said called station;
- said control point determining whether a loop condition exists;
- and
- if said control point determines that a loop condition exists, said control point sending a first call treatment message to said switching point, said first call treatment message instructing said switching point so as not to forward said call to said forward-to number.
A system for processing a call to a called station, said called station having a forward-to number, said system comprising:
- a switching point for terminating said call to said called station and for forwarding said call to said forward-to number, said switching point being provisioned with at least one trigger to transmit at least one message when processing said call to said called station;
- and
- a control point communicatively coupled to said switching point, said control point being provisioned with service logic to determine whether a loop condition exists in response to said at least one message and to instruct said switching point so as not to forward said call to said forward-to number if said control point determines that a loop condition exists.
Dependencies are inferred from the claim text.