System and method for completing private or unknown calls made to subscribers to a privacy screening service

In an advanced intelligent network system having a first service switching point, a second service switching point, a service control point in communication with the first and second service switching points, a service node having a service node number directly connected to the second service switching point, and a subscriber line having a subscriber number connected to the first service switching point, a privacy screening manager comprising:

• (a) a first termination attempt trigger provisioned on the subscriber line at the first service switching point such that a call from a calling party to the subscriber triggers a first query to the service control point;
• (b) an applications package on the service control point directing that the call be routed to the service node if the calling party has a private calling party number;
• (c) a second termination attempt trigger at the second service switching point that triggers a second query from the second service switching point to the service control point;
• and
• (d) an applications package at the service control point that responds to the second query by retrieving the subscriber number from the re-directing party field of the second query and populating a display text field of its response to the second query with the subscriber number.

A system for managing calls from a calling party number to a subscriber number for a subscriber who has subscribed to a privacy screening service comprising:

• (a) a service switching point and a service node in communication with the service switching point,
• (b) a signaling system 7 data link from the service switching point to a service control point through a signaling transfer point;
• (c) a line connecting the service switching point to a multi-line hunt group at the service node;
• and
• (d) a termination attempt trigger for the service node's multi-line hunt group provisioned on the service switching point,
• wherein the termination attempt trigger prompts a query to the service control point, and
• the service control point responds to the query with a response that has the subscriber number in its display text field.

A method for managing a call from a calling party calling from a calling party number having a presentation indicator classifying the calling party number as public, private or unknown, to a subscriber to a privacy screening service at a subscriber number in an advanced intelligent network having a service control point and a service node having a service node number, wherein the service control point determines whether the calling party number is public, private or unknown, comprising:

• (a) re-writing the presentation indicator as public, if the calling party number is private;
• (b) playing an announcement to the calling party, asking the calling party for permission to override the calling party's privacy, and, if the calling party grants permission to override, routing the call to the service node;
• (c) triggering a query at a service switching point in direct communication with the service node to the service control point, said query containing the subscriber number in the redirecting party field of the query;
• (d) responding to said query with a response that includes the subscriber number in a display text field of the response;
• and
• (e) routing the call to the subscriber at the subscriber number.

A service manager comprising:

• (a) means for routing a call from a calling party to a privacy screening service subscriber to a service node via a service switching point in communication with the service node, when the calling party has a private number;
• (b) means for sending a query to a service control point from the service switching point;
• (c) means for responding to the query by sending a message from the service control point to the service node via the service switching point with the message's display text field populated with the subscriber number;
• and
• (d) means for terminating the call to the subscriber.