Network terminating unit for connecting analog and digital communication systems to a digital network

• US 5,550,913 A
• Filed: 12/09/1994
• Issued: 08/27/1996
• Est. Priority Date: 12/09/1991
• Status: Expired due to Fees

• Current Assignee: Post Office Limited (International Distributions Services plc)
• Original Assignee: Post Office Limited (International Distributions Services plc)
• Inventors: Kirwan, Stephen A., McMaster, Samuel
• Primary Examiner(s): Hofsass, Jeffery
• Assistant Examiner(s): Hong, Harry S.
• Application Number:
  US08/244,886
• Time in Patent Office: 627 Days
• Field of Search: 379/94, 379/207, 379/219, 379/220, 379/221, 379/229, 379/230, 379/233, 379/234, 379/225, 370/60.1, 370/94.1, 370/110.1, 370/67, 370/85.1
• US Class Current: 379/230
• CPC Class Codes: H04Q 11/0421 Circuit arrangements therefor
• CPC Class Codes: H04Q 3/62 for connecting to private branch exchanges

Abstract

A network terminating unit, for interconnecting analog and digital communication systems to a digital network, having an analog voice module for connection to an analog private exchange, a high speed data communication module for connection to high speed communications devices, and an interface for common channel signalling connection to a digital network. The unit may further include a module for common channel signalling connectivity to a digital private exchange.

Claims

1. Communications terminal equipment comprising:

an analog voice module, for connection to an analog private exchange;

a high speed data communication module, for connection to high speed communications devices;

a first interface for a common channel signalling connection to a first digital network; and

a second interface for a common channel signalling connection to a second digital network.

2. Equipment as claimed in claim 1, further comprising a module for common channel signalling connectivity to a digital private exchange.

3. Equipment as claimed in claim 1, wherein a user of communications equipment, which is connected to an analog private exchange connected thereto, is able to communicate via said analog voice module and said interface with users of said digital network.

4. Equipment as claimed in claim 1, wherein the equipment comprises a storage unit, a processing unit, and buses interconnecting the modules and the interfaces.

5. Equipment as claimed in claim 1, wherein a telephone call, from a unit connected to the equipment via a first private exchange, to a unit connected to the equipment via a second private exchange, is routed through the equipment without being passed via the interfaces to the network.

6. Equipment as claimed in claim 1, wherein the first and second interfaces operate different signalling protocols.

7. Equipment as claimed in claim 1, wherein calls from communications equipment connected thereto to communications equipment accessible via either the first or second digital network are automatically routed via the most favorable network.

8. Equipment as claimed in claim 1, comprising means for storing details of all calls routed therethrough.

9. Communications terminal equipment comprising:

a digital connection module, for common channel signalling connection to a digital private exchange;

a high speed data communication module, for connection to high speed communications devices;

a first interface for common channel signalling connection to a first digital network; and

a second interface for a common channel signalling connection to a second digital network.

10. Equipment as claimed in claim 9, wherein the equipment comprises a storage unit, a processing unit, and buses interconnecting the modules and the interfaces.

11. Equipment as claimed in claim 9, wherein a telephone call, from a unit connected to the equipment via a first private exchange, to a unit connected to the equipment via a second private exchange, is routed through the equipment without being passed via the interfaces to the network.

12. Equipment as claimed in claim 9, wherein the first and second interfaces operate different signalling protocols.

13. Equipment as claimed in claim 9, wherein calls from communications equipment connected thereto to communications equipment accessible via either the first or second digital network are automatically routed via the most favorable network.

14. Equipment as claimed in claim 9, comprising means for storing details of all calls routed therethrough.