Method for improving call completion rates in telephony

• US 5,793,858 A
• Filed: 03/20/1996
• Issued: 08/11/1998
• Est. Priority Date: 03/20/1996
• Status: Expired due to Term

• Current Assignee: RPX Clearinghouse LLC (RPX Corporation)
• Original Assignee: Northern Telecom Limited (Nortel Networks Corporation)
• Inventors: Weaver, Chris, Proulx, Stephane, Salembier, Maude, Meubus, Charles
• Primary Examiner(s): Hong, Harry S.
• Application Number:
  US08/618,747
• Time in Patent Office: 874 Days
• Field of Search: 379/67, 379/88, 379/89, 379/210, 379/211, 379/212, 379/214, 379/94, 379/230, 379/233, 379/277, 379/219, 379/220, 379/221, 379/257, 379/93.14, 379/188, 379/196, 379/197 , 379/198
• US Class Current: 379/211.01
• CPC Class Codes: H04M 1/663 Preventing unauthorised calls to a telephone set
• CPC Class Codes: H04M 3/436 Arrangements for screening incoming calls , i.e. evaluating the characteristics of a call before deciding whether to answer it based on the calling party profile H04M3/42059; based on location H04M3/42348; based on presence H04M3/42365; diversion H04M3/54

Abstract

The method of in-session activation of the present invention gives Telcos the ability to offer callers a menu of call completion services when the call encounters a busy or no-answer condition. It provides in-session activation capability from DTMF and dial-pulse sets enabling callers to activate the services without having to hang up. The method is intended for residential and business end-users with RES, business lines, or PBX lines.

Claims

1. A method of operating a public, Telco operated local telephone switching office having a central processor, a plurality of subscriber lines terminating at the switching office, and means for providing announcements on the subscriber lines, comprising:

(a) detecting status of a call including the dialed number (DN) originated by one of the subscriber lines;

(b) commencing an announcement on said one of the subscriber lines only if said call has not been completed after a predetermined time while the originated call is in-session; and

(c) causing said central processor to respond to a signal originated by said one of the subscriber lines during said announcement in a manner consequent, in a predetermined manner, upon the status of said call during said announcement while maintaining the originated call in-session until disposition by said central processor of the originated call in order to establish connection to said DN should it answer the call prior to said disposition.

2. The method as defined in claim 1, further comprising the step of screening said one of the subscriber lines to determine any special status assigned thereto.

3. The method as defined in claim 2, wherein said special status includes at least one of:

belonging to a pre-identified subscriber group;

belonging to an alternate service provider;

originating a dialed number (DN) for which steps (b) and (c) are not possible.

4. The method as defined in claim 1, further comprising the step of causing another announcement in response to said signal originated by said one of the subscriber lines.

5. A method of operating a public, Telco operated local telephone switching office having a central processor, a plurality of subscriber lines terminating at the switching office, and means for providing announcements on the subscriber lines, comprising:

(a) detecting status of a call including the dialed number (DN) originated by one of the subscriber lines;

(b) commencing an announcement on said one of the subscriber lines only if said call has not been completed after a predetermined time while the originated call is in-session;

(c) causing said central processor to respond to a signal originated by said one of the subscriber lines during said announcement in a manner consequent, in a predetermined manner, upon the status of said call during said announcement while maintaining the originated call in-session until disposition by said central processor of the originated call; and

(d) responding to said signal originated by said one of the subscriber lines by examining said DN and identifying a service provider if said DN is a toll number.

6. The method as defined in claim 5, further comprising the step of screening said one of the subscriber lines to determine any special status assigned thereto.

7. The method as defined in claim 5, wherein said special status includes at least one of:

belonging to a pre-identified subscriber group;

belonging to an alternate service provider;

originating a dialed number (DN) for which steps (b) and (c) are not possible.

8. The method as defined in claim 5, further comprising the step of causing another announcement in response to said signal originated by said one of the subscriber lines.