Directory number conversion for private directory number plan

• US 20040086099A1
• Filed: 11/01/2002
• Published: 05/06/2004
• Est. Priority Date: 05/04/2000
• Status: Abandoned Application

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Romanski, Irena
• Application Number:
  US10/286,318
• Publication Number:
  US 20040086099A1
• Time in Patent Office: Days
• US Class Current: 379/201.01
• CPC Class Codes: H04Q 2213/13091 CLI, identification of calling line
• CPC Class Codes: H04Q 2213/13096 Digital apparatus individually associated with a subscriber line, digital line circuits
• CPC Class Codes: H04Q 2213/13097 Numbering, addressing
• CPC Class Codes: H04Q 2213/13102 Common translator
• CPC Class Codes: H04Q 2213/13103 Memory
• CPC Class Codes: H04Q 2213/13106 Microprocessor, CPU
• CPC Class Codes: H04Q 2213/13175 Graphical user interface [GUI], WWW interface, visual indication
• CPC Class Codes: H04Q 2213/13176 Common channel signaling, CCS7
• CPC Class Codes: H04Q 2213/13222 PBX circuits in public exchange, centrex
• CPC Class Codes: H04Q 2213/13384 Inter-PBX traffic, PBX networks, e.g. corporate networks
• CPC Class Codes: H04Q 2213/13399 Virtual channel/circuits
• CPC Class Codes: H04Q 3/62 for connecting to private branch exchanges
• CPC Class Codes: H04Q 3/72 Finding out and indicating number of calling subscriber

Abstract

A method extracts an internal access code from the signaling of a connection between a first subscriber on a first switching center and a second subscriber on a second switching center in the public telephone network. The signaling from the first subscriber is converted to the corresponding internal access code of the first subscriber using a conversion table that contains the internal access codes of the corresponding signaling of the subscribers on the first switching center. The internal access code of the first subscriber is then communicated to the second subscriber allowing the second subscriber to call back the first subscriber.

Claims

1. A telephone number converter comprising:

a conversion table containing sets of numbers, each set including a public telecommunication number and an associated internal access code, wherein a first subscriber is on a first switching center and a second subscriber is located outside said first switching center, and wherein a first internal access code is associated with said first switching center; and

means for searching said conversion table to find a first public telecommunication number of said first subscriber and for indicating said first internal access code to said second subscriber.

2. The telephone number converter of claim 1, wherein said first internal access code is used by said second subscriber to call back said first subscriber.

3. The telephone number converter of claim 1, wherein said first internal access code is a prefix to an intercom telephone number for a Centrex service.

4. The telephone number converter of claim 1, wherein said first subscriber is a mobile radio subscriber.

5. The telephone number converter of claim 1, wherein said means for searching comprises a computer and a database.

6. The telephone number converter of claim 1, wherein each of said sets of numbers includes plural numbers each designating the same device.

7. The telephone number converter of claim 1, wherein each of said sets of numbers includes a telephone number conforming to ITU-T Recommendation E.164.

8. An apparatus for extracting an internal access code of a first subscriber on a first switching center from signaling sent from said first subscriber to a second subscriber, comprising:

a conversion table containing an internal access code corresponding to said signaling; and

a computer that converts said signaling to said internal access code in accordance with said conversion table, wherein said second subscriber is in the public telephone network outside of said first switching center.

9. The apparatus of claim 8, wherein said internal access code is a telephone number of said first subscriber that can be called back.

10. The apparatus of claim 8, wherein said first internal access code is a prefix to an intercom telephone number for a Centrex service.

11. The apparatus of claim 8, wherein said internal access code of said first subscriber is extracted centrally in a second switching center of said second subscriber.

12. The apparatus of claim 8, wherein said conversion table is stored in a height-balanced tree of telephone numbers.

13. The apparatus of claim 8, wherein said apparatus overwrites a telephone number in said signaling from said first subscriber that is specific to said first switching center.

14. A method for extracting an internal access code of a first subscriber on a first switching center from signaling sent from said first subscriber to a second subscriber, comprising:

converting said signaling to said internal access code using a conversion table, wherein said conversion table contains said internal access code in a corresponding relationship to said signaling, and wherein said second subscriber is in the public telephone network outside of said first switching center.

15. The method of claim 14, wherein said internal access code is a telephone number of said first subscriber that can be called back.

16. The method of claim 14, wherein said first internal access code is a prefix to an intercom telephone number for a Centrex service.

17. The method of claim 14, wherein said internal access code of said first subscriber is extracted centrally in a second switching center of said second subscriber.

18. The method of claim 14, wherein said conversion table is stored in a height-balanced tree of telephone numbers.

19. The method of claim 14, wherein a telephone number in said signaling from said first subscriber that is specific to said first switching center has been overwritten.

20. The method of claim 14, further comprising:

displaying said internal access code to said second subscriber.