Method and apparatus for spectral containment over telephone service lines

• US 7,352,857 B2
• Filed: 11/01/2005
• Issued: 04/01/2008
• Est. Priority Date: 08/18/1998
• Status: Expired due to Fees

• Current Assignee: AT&T Labs Incorporated (AT&T, Inc.)
• Original Assignee: AT&T Labs Incorporated (AT&T, Inc.)
• Inventors: Russell, Mark A., Weinert, Stephen
• Primary Examiner(s): TIEU, BINH KIEN
• Application Number:
  US11/262,818
• Publication Number:
  US 20060067488A1
• Time in Patent Office: 882 Days
• Field of Search: 379/1.01, 379/1.03, 379/9.06, 379/15.01, 379/15.03, 379/22.02, 379 2206- 2207, 379/23, 379/25, 379/27.05, 379/32.04
• US Class Current: 379/399.01
• CPC Class Codes: H04M 11/062 using different frequency bands for speech and other data
• CPC Class Codes: H04M 3/007 Access interface units for simultaneous transmission of speech and data, e.g. digital subscriber line [DSL] access interface units DSL access multiplexers H04Q11/0478, and H04L12/2856

Abstract

A method for providing spectral containment over telecommunications service lines is provided. The method includes selecting a filter having spectral characteristics corresponding to a predetermined passband. The method also includes connecting the filter in series to at least one loop used to provide at least one telecommunications service to a customer. The method further includes activating service over the at least one loop. The filter attenuates signals transmitted on frequencies outside of the predetermined passband over the at least one loop.

Claims

1. A method for providing spectral containment over telecommunications service lines, comprising:

selecting a filter having spectral characteristics corresponding to a predetermined passband;

connecting the filter in series to and between two ends of at least one loop used to provide at least one telecommunications service to a customer; and

activating service over said at least one loop, said filter preventing signals transmitted on frequencies outside of the predetermined passband over said at least one loop.

2. The method according to claim 1,

wherein said prevented signals comprise unexpected transmissions.

3. The method according to claim 1,

wherein said prevented signals comprise unauthorized transmissions.

4. The method according to claim 1,

wherein said prevented signals comprise unintended transmissions.

5. The method according to claim 1, said connecting further comprising:

housing the filter within a housing that also houses a loop modification unit.

6. The method according to claim 1, said connecting further comprising:

placing the filter within a spectrum protector coil that interfaces with a housing that houses a loop modification unit.

7. The method according to claim 1, said connecting further comprising:

connecting the filter in series to at least one loop of a loop plant, said filter intervening between a remote terminal facility and copper pair side of the loop.

8. The method according to claim 1, said selecting further comprising:

determining a service to be excluded on said at least one loop from the group consisting of DDS, ISDN, and xDSL; and

selecting a filter having spectral characteristics excluding operating frequencies of the determined service.

9. A method for manufacturing a spectral containment unit for providing spectral containment over telecommunications service lines, comprising:

selecting a filter having predetermined spectral characteristics corresponding to a predetermined passband;

connecting the filter in series to and between two ends of at least one loop used to provide at least one telecommunications service to a customer; and

packaging said filter within a housing that also houses a loop modification unit.

10. The method according to claim 9, said selecting further comprising:

determining a service to be excluded by said filter from the group consisting of DDS, ISDN, and xDSL; and

selecting a filter having spectral characteristics excluding operating frequencies of the determined service.

11. A method for manufacturing a spectral containment unit for providing spectral containment over telecommunications service lines, comprising:

selecting a filter having predetermined spectral characteristics corresponding to a predetermined passband;

connecting the filter in series to and between two ends of at least one loop used to provide at least one telecommunications service to a customer; and

packaging said filter within a spectrum protector coil that interfaces with a housing that houses a loop modification unit filter.

12. The method according to claim 11, said selecting further comprising:

determining a service to be excluded by said filter from the group consisting of DDS, ISDN, and xDSL; and

selecting a filter having spectral characteristics excluding operating frequencies of the determined service.

13. An apparatus for providing spectral containment over telecommunications service lines, comprising:

a filter having spectral characteristics corresponding to a predetermined passband, the filter being connected in series to and between two ends of at least one loop used to provide at least one telecommunications service to a customer, said filter preventing signals transmitted on frequencies outside of the predetermined passband over said at least one loop.

14. The apparatus according to claim 13,

wherein said prevented signals comprise unexpected transmissions.

15. The apparatus according to claim 13,

wherein said prevented signals comprise unauthorized transmissions.

16. The apparatus according to claim 13,

wherein said prevented signals comprise unintended transmissions.

17. The apparatus according to claim 13, further comprising:

a housing that houses said filter and a loop modification unit.

18. The apparatus according to claim 13, further comprising:

a spectrum protector coil within which the filter is provided, and which interfaces with a housing that houses a loop modification unit.

19. The apparatus according to claim 13,

wherein said filter is connected in series to at least one loop of a loop plant, said filter intervening between a remote terminal facility and copper pair side of the loop.

20. The apparatus according to claim 13, said filter excluding transmissions selected from the group of services consisting of:

DDS, ISDN, and xDSL.