DWDM system with IP telephony provisioning at remote locations

• US 7,286,756 B1
• Filed: 05/15/2001
• Issued: 10/23/2007
• Est. Priority Date: 05/15/2001
• Status: Expired due to Term

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Marshall, Howard, Webber, Kenneth, Roberson, Russell
• Primary Examiner(s): Li; Shi K
• Application Number:
  US09/858,777
• Time in Patent Office: 2,352 Days
• Field of Search: 398/58, 398/68, 398/71, 398/210, 398/30, 398/31
• US Class Current: 398/31
• CPC Class Codes: H04J 14/0227 Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
• CPC Class Codes: H04J 14/0241 Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
• CPC Class Codes: H04J 14/028 WDM bus architectures
• CPC Class Codes: H04L 65/762 at the source reformatting of additional data in video distribution servers H04N21/2355

Abstract

A method for providing voice communications at an optical amplifier site of a DWDM system is disclosed. The method generally comprises receiving an optical service channel at the amplifier site and converting an optical signal of the optical service channel to a digital electrical signal at the amplifier site. The optical service channel carries voice data and has a wavelength that is out of band with respect to wavelength bands of a multiplexed payload channel of the DWDM system. The method further includes sending the digital electrical signal to a router configured to support voice over IP.

Claims

1. A method for providing voice communications at an optical amplifier site of a DWDM system, the method comprising:

receiving an optical service channel and a multiplexed payload channel at the amplifier site, the optical service channel carrying voice over IP data in a supervisory channel of the optical service channel and having a wavelength that is out of band with respect to wavelength bands of a multiplexed payload channel of the DWDM system, the optical service channel independent of the multiplexed payload channel and configured to carry monitoring data for DWDM equipment;

converting an optical signal of the optical service channel to a digital electrical signal at the amplifier site; and

sending the digital electrical signal to a router configured to support voice over IP;

wherein the router is configured to communicate with other routers connected to other optical amplifier sites to operate in a wide area network.

2. The method of claim 1 wherein receiving an optical service channel comprises receiving an optical service channel at a wavelength of approximately 1480 nm.

3. The method of claim 1 wherein the optical service channel further carries TCP/IP data traffic.

4. The method of claim 1 wherein the router comprises a voice module operable to provide analog telephone service.

5. The method of claim 1 further comprising converting a digital electrical signal received from the router to an optical signal and sending the optical signal over the optical service channel.

6. The method of claim 5 wherein sending the optical signal comprises sending the optical signal to an adjacent amplifier site.

7. The method of claim 5 wherein sending the optical signal comprises sending the optical signal to a terminal node.

8. The method of claim 1 further comprising sending data to a network operations center.

9. The method of claim 1 wherein said network management information includes provisioning data for DWDM equipment located within the DWDM system.

10. The method of claim 1 wherein the voice data is sent over a 64K bit/second portion of the optical service channel.

11. The method of claim 1 wherein receiving the optical service channel comprises receiving voice over IP and TCP/IP data traffic over the optical service channel.

12. The method of claim 11 wherein the voice over IP and TCP/IP data traffic is carried on a F1 user channel portion of the optical service channel.

13. A system for providing voice communications at a line site location of a DWDM system, the system comprising:

a node at the line site location operable to receive and send multiplexed optical signals of a payload channel and an optical service channel carrying voice over IP data in a supervisory channel of the optical service channel and having a wavelength that is out of band with respect to wavelength bands of the multiplexed payload channel, the optical service channel independent of the multiplexed payload channel and configured to carry monitoring data for DWDM equipment;

a converter system operable to convert optical signals received from the optical service channel at the node to digital electrical signals; and

convert electrical signals to optical signals; and

a router operable to receive the digital electrical signals and support voice over IP; and

configured to communicate with other routers connected to other optical amplifier sites to operate in a wide area network.

14. The system of claim 13 further comprising a telephone in communication with the router.

15. The system of claim 14 wherein the router includes a voice module operable to convert the digital electrical signals to analog voice signals and wherein the telephone is an analog phone.

16. The system of claim 14 wherein the telephone is an IP telephone.

17. The system of claim 13 further comprising a hub operable to provide data communications between a computer and the router.

18. The system of claim 17 wherein the system is configured to provide TCP/IP data communications.

19. The system of claim 13 wherein the optical service channel is configured to carry TCP/IP data.

20. The system of claim 13 wherein the node comprises an optical amplifier.

21. The system of claim 13 wherein the node is not operable to demultiplex payload channels.

22. The system of claim 13 wherein the router is configured to operate as a TCP/IP wide area network.

23. A system for providing voice communications at an optical amplifier site of a DWDM system, the system comprising:

means for receiving an optical service channel at the amplifier site, the optical service channel carrying voice over IP data in a supervisory channel of the optical service channel and operating at a wavelength that is out of band with respect to wavelength bands of a multiplexed payload channel of the DWDM system, the optical service channel independent of the multiplexed payload channel and configured to carry network management information;

a converter operable to convert an optical signal of the optical service channel to a digital electrical signal; and

convert an electrical signal received from the router to an optical signal for transmittal over the optical service channel; and

means for sending the digital electrical signal to a router operable to support voice over IP;

wherein the router is configured to communicate with other routers connected to other optical amplifier sites to operate in a wide area network.