Sonet overhead server

• US 5,365,518 A
• Filed: 03/02/1992
• Issued: 11/15/1994
• Est. Priority Date: 03/02/1992
• Status: Expired due to Term

• Current Assignee: Alcatel Network Systems India Limited (Nokia Corporation)
• Original Assignee: Alcatel Network Systems India Limited (Nokia Corporation)
• Inventors: Noser, Francis G.
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): Patel, Ajit
• Application Number:
  US07/844,238
• Time in Patent Office: 988 Days
• Field of Search: 370/58.1, 370/58.2, 370/58.3, 370/60, 370/60.1, 370/94.1, 370/94.2, 370/94.3, 370/110.1, 370/112, 370/102, 370/100.1, 379/291, 379/335
• US Class Current: 370/535
• CPC Class Codes: H04J 2203/0005 Switching elements
• CPC Class Codes: H04J 2203/0012 Switching modules and their interconnections
• CPC Class Codes: H04J 2203/0089 Multiplexing, e.g. coding, scrambling, SONET
• CPC Class Codes: H04J 3/1611 Synchronous digital hierarchy [SDH] or SONET H04J3/1664 takes precedence for interactions with OTN
• CPC Class Codes: H04Q 11/0421 Circuit arrangements therefor
• CPC Class Codes: H04Q 11/0478 Provisions for broadband connections
• CPC Class Codes: Y10S 370/907 Synchronous optical network, SONET

Abstract

A server combines a multiplexer/demultiplexer with a circuit switch to handle both high-speed overhead and data interfaced to the server through a cross-connect; multiple servers may be connected to the cross-connect in a star, mesh or ring network.

Claims

1. A network element, comprising:

a cross-connect, responsive to a plurality of input signals in an electrical transport format for use in the network element, the input signals comprising both overhead and data signals organized in frames having a plurality of rows and columns of bytes, for cross-connecting the input data and overhead signals and for providing the cross-connected input data and overhead signals in the electrical transport format; and

plural servers, each responsive to different cross-connected input data and overhead signals from the cross-connect in the electrical transport format, for selectively input data and overhead signals and responsive to output data and overhead signals from user interfaces, for providing the output data and overhead signals in the electrical transport format, and wherein the cross-connect is responsive to the output data and overhead signals in the electrical transport format for cross-connecting and providing same as cross-connected output signals in the electrical transport format.

2. The network element of claim 1, wherein the plural servers are interconnected in a star network.

3. The network element of claim 1, wherein the plural servers are interconnected in a mesh network.

4. The network element of claim 1, wherein the plural servers are interconnected in a ring network.

5. A network element, comprising:

a cross-connect, responsive to a plurality of input signals in an electrical transport format for use in the network element having both overhead and data signals organized in frames having a plurality of rows and columns of bytes, for cross-connecting the input data and overhead signals and for providing the input data and overhead signals in the electrical transport format; and

plural servers, interconnected in a star network, each responsive to different input data and overhead signals in the electrical transport format from the cross-connect on a plurality of corresponding interfaces, each having the electrical transport format, for selectively terminating input data and overhead signals and responsive to output data and overhead signals from user interfaces, for providing the output data and overhead signals in the electrical transport format, and wherein the cross-connect is responsive to the output data and overhead signals in the electrical transport format for cross-connecting and providing same as cross-connected output signals in the electrical transport format.

6. A network element, comprising:

a cross-connect, responsive to a plurality of input signals in an electrical transport format for use the network element having both overhead and data signals organized in frames having a plurality of rows and columns of bytes, for cross-connecting the input data and overhead signals and for providing the input data and overhead signals in the electrical transport format; and

plural servers, interconnected in a mesh network, each responsive to different input data and overhead signals in the electrical transport format from the cross-connect on a plurality of corresponding interfaces, each having the electrical transport format, for selectively terminating input data and overhead signals and responsive to output data and overhead signals from user interfaces, for providing the output data and overhead signals in the electrical transport format, and wherein the cross-connect is responsive to the output data and overhead signals in the electrical transport format for cross-connecting and providing same as cross-connected output signals in the electrical transport format.

7. A network element, comprising:

a cross-connect, responsive to a plurality of input signals in an electrical transport format for use in the network element having both overhead and data signals organized in frames having a plurality of rows and columns of bytes, for cross-connecting the input data and overhead signals and for providing the input data and overhead signals in the electrical transport format; and

plural servers, interconnected in a ring network, each responsive to different input data and overhead signals in the electrical transport format from the cross-connect on a plurality of corresponding interfaces, each having the electrical transport format, for selectively terminating input data and overhead signals and responsive to output data and overhead signals from user interfaces, for providing the output data and overhead signals in the electrical transport format, and wherein the cross-connect is responsive to the output data and overhead signals in the electrical transport format for cross-connecting and providing same as cross-connected output signals in the electrical transport format.