Uninterrupted transfer of voice telephony service to derived voice technology

• US 6,657,994 B1
• Filed: 08/25/1999
• Issued: 12/02/2003
• Est. Priority Date: 08/25/1999
• Status: Expired due to Term

• Current Assignee: GC Pivotal LLC (GTT Communications, Inc.)
• Original Assignee: Covad Communications Group Incorporated
• Inventors: Rajakarunanayake, Yasantha N.
• Primary Examiner(s): Olms, Douglas
• Assistant Examiner(s): Pizarro, Ricardo M.
• Application Number:
  US09/383,167
• Time in Patent Office: 1,560 Days
• Field of Search: 370/350, 370/352, 370/353, 370/354, 370/389, 370/395.2, 370/395.21, 370/395.41, 370/410, 370/419, 379/220, 379/221, 379/219
• US Class Current: 370/352
• CPC Class Codes: H04M 11/062 using different frequency bands for speech and other data
• CPC Class Codes: H04M 3/42297 with number portability
• CPC Class Codes: H04M 7/006 Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP) , including next generation networks with a packet-switched transport layer H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42

Abstract

Systems and methods for providing uninterrupted transfer of voice telephony provided by a first service provider to a derived voice technology over a digital subscriber line provided by a second service provider are disclosed are disclosed. The system generally comprises a first telephone line configured to connect to a first and a second voice switch of the first and second service providers, respectively, having a same assigned telephone number and a derived voice customer premise equipment configured to connect to the first and second telephone lines and to selectively connect a telephone to the second voice switch. The method generally comprises establishing connectivity between a telephone and a first and a second voice switch of the first and second service providers via a first and a second line, respectively, having a same assigned telephone number and selectively connecting the telephone to the second voice switch via a client premise equipment.

Claims

1. A system for providing uninterrupted voice telephony service during a cut over from telephony service provided by a first local exchange carrier to telephony service provided by a second local exchange carrier, comprising:

a first telephone line configured to connect to a first voice switch of the first local exchange carrier having an assigned telephone number;

a second telephone line configured to connect to a second voice switch of the second local exchange carrier having the assigned telephone number; and

a derived voice customer premise equipment configured to connect to the first telephone line and to the second telephone line, said derived voice customer premise equipment is further configured to detect an off-hook state of a telephone and, upon detecting the off-hook state, detect a dial tone provided to the telephone and to selectively connect the telephone to the second voice switch; and

wherein said derived voice customer premise equipment is further configured to detect a dial tone provided to the telephone upon detection of the off-hook state of the telephone.

2. The system for providing uninterrupted voice telephony service of claim 1, further comprising a splitter coupled to said derived voice customer premise equipment, said telephone, and said first telephone line.

3. The system for providing uninterrupted voice telephony service of claim 1, wherein said derived voice customer premise equipment is further configured to connect the telephone to the second voice switch carrying an incoming telephone call for receipt of the incoming telephone call by the telephone.

4. The system for providing uninterrupted voice telephony service of claim 1, wherein said derived voice customer premise equipment is further configured to disconnect the telephone from the second voice switch upon said detection of the dial tone provided to the telephone.

5. The system for providing uninterrupted voice telephony service of claim 1, wherein said derived voice customer premise equipment is further configured to connect the telephone to the second voice switch in absence of dial tone provided to the telephone.

6. The system for providing uninterrupted voice telephony service of claim 5, wherein said derived voice customer premise equipment is further configured to determine non-provision of dial tone upon detection of absence of dial tone provided to the telephone for a predetermined period of time.

7. The system for providing uninterrupted voice telephony service of claim 1, wherein said first telephone line is over a first twisted pair copper wiring and said second telephone line is over a second twisted pair copper wiring different from said first twisted pair copper wiring.

8. The system for providing uninterrupted voice telephony service of claim 1, wherein the connection between the telephone and the first voice switch utilizes base-band analog technology and the connection between the telephone and the second voice switch utilizes derived voice technology.

9. A method for providing uninterrupted voice telephony service during a cut over from telephony service provided by a first local exchange carrier to telephony service provided by a second local exchange carrier, comprising:

establishing connectivity between a telephone and a first voice switch of the first local exchange carrier via a first line having an assigned telephone number;

establishing connectivity between said telephone and a second voice switch of the second local exchange carrier via a second line having said assigned telephone number;

detecting an off-hook state of the telephone by a client premise equipment;

awaiting for a dial tone provided to the telephone by the first voice switch upon said detecting; and

selectively connecting said telephone to said second voice switch via the client premise equipment; and

wherein said derived voice customer premise equipment is further configured to detect a dial tone provided to the telephone upon detection of the off-hook state of the telephone.

10. The method for providing uninterrupted voice telephony service of claim 9, wherein said establishing connectivity with said first voice switch is prior to said establishing connectivity with said second voice switch.

11. The method for providing uninterrupted voice telephony service of claim 9, further comprising:

detecting an incoming telephone call through the second voice switch by said client premise equipment; and

connecting the telephone to the second voice switch carrying the incoming telephone call via said client premise equipment.

12. The method for providing uninterrupted voice telephony service of claim 11, further comprising:

determining non-provision of dial tone to the telephone by the first voice switch upon an absence of dial tone after said awaiting for a predetermined period of time by said client premise equipment; and

connecting the telephone to the second voice switch via said client premise equipment upon said determining.

13. The method for providing uninterrupted voice telephony service of claim 9, wherein said establishing connectivity between said telephone and said first voice switch of the first local exchange carrier via said first line is over a first pair of wiring and said establishing connectivity between said telephone and said second voice switch of the second local exchange carrier via said second line is over a second pair of wiring different from said first pair of wiring.

14. The method for providing uninterrupted voice telephony service of claim 9, wherein said establishing connectivity between said telephone and said first voice switch utilizes base-band analog technology and said establishing connectivity from said telephone to said second voice switch utilizes derived voice technology.

15. A method for cutting over from telephony service provided by a first local exchange carrier to telephony service provided by a second local exchange carrier, comprising:

connecting a derived voice customer premise equipment to a first line coupled to a first voice switch of the first local exchange carrier;

connecting the derived voice customer premise equipment to a second line coupled to a second voice switch of the second local exchange carrier;

disconnecting telephony service from the first local exchange carrier;

detecting an off-hook state of the telephone by said derived voice customer premise equipment; and

awaiting a dial tone provided to the telephone by the first voice switch upon said connecting by said derived voice customer premise equipment,

wherein said derived voice customer premise equipment is configured to selectively connect the telephone to said second voice switch prior to said disconnecting and wherein said derived voice customer premise equipment connects the telephone to said second voice switch after said disconnecting;

wherein said derived voice customer premise equipment is further configured to detect a dial tone provided to the telephone upon detection of the off-hook state of the telephone.

16. A method for providing uninterrupted voice telephony service according to claim 15, wherein said connecting to the first voice switch utilizes base-band analog technology and said connecting to the second voice switch utilizes derived voice technology.

17. A method for providing uninterrupted voice telephony service according to claim 15, further comprising:

determining by said derived voice customer premise equipment non-provision of dial tone to the telephone by the first voice switch upon an absence of dial tone after said awaiting for a predetermined period of time; and

connecting the telephone to the second voice switch upon said determining by said derived voice customer premise equipment.