Fiber optic based subscriber terminal

• US 5,982,854 A
• Filed: 02/23/1996
• Issued: 11/09/1999
• Est. Priority Date: 02/23/1996
• Status: Expired due to Term

• Current Assignee: Xylon LLC (Intellectual Ventures LLC)
• Original Assignee: Alcatel-Lucent USA, Inc. (Nokia Corporation)
• Inventors: Ehreth, David
• Primary Examiner(s): Bost, Dwayne D.
• Assistant Examiner(s): LEGREE, TRACY MICHELLE
• Application Number:
  US08/605,944
• Time in Patent Office: 1,355 Days
• Field of Search: 379/56.2, 379/39, 379/37, 379/210, 379/212, 379/32, 379/33, 455/74.1, 455/414, 455/417, 455/404, 455/552, 455/462, 455/465, 455/403, 455/426, 359/179, 359/145, 359/118, 359/125, 359/137, 359/109
• US Class Current: 379/56.2
• CPC Class Codes: H04B 10/25752 Optical arrangements for wireless networks
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 92/12 between access points and access point controllers

Abstract

A subscriber terminal (22) within a business/residence (32) is in communications with a telecommunications network (12) through a fiber optic connection (33) to an optical network unit (20). Telephony signals are transmitted to and from the subscriber terminal to a user through a cordless telephone handset (26). During normal operation, the cordless telephone handset (26) operates in a cordless mode, passing telephony signals to a subscriber terminal telephone antenna (24) for transmission on the fiber optic connection (33). In the event of a power outage at the business/residence (32), the cordless telephone handset (26) switches to a wireless mode in order to continue to provide telephony communications. In the wireless mode, telephony communications are provided from the cordless telephone handset (26) to the telecommunications network (12) through a wireless telephone provider (14).

Claims

1. A subscriber terminal for a telecommunications network, comprising:

a subscriber terminal having;

an external network interface module operable to exchange information signals with the telecommunications network over a fiber optic connection from a fiber optic source, the information signals including telephony, video, and data;

a telephony interface module operable to exchange telephony signals with the telecommunications network through the external network interface module, the telephony interface module operable to detect a loss of power to the fiber optic source during the fiber optic connection;

a handset associated with the subscriber terminal for communicating telephony signals with the telecommunications network through the telephony interface module and the external network interface module, the handset functioning in a cordless mode for communicating with the telephony interface module during normal operation, the handset functioning in a wireless mode for communicating with the telecommunications network and bypassing the telephony interface module and the external network interface module in response to the loss of primary power to the fiber optic source.

2. The subscriber terminal of claim 1, wherein the telephony interface module and the external network interface module include a back-up power supply to provide power upon the loss of the primary power.

3. The subscriber terminal of claim 1, wherein the handset performs cellular communications with a cellular provider when operating in the wireless mode.

4. The subscriber terminal of claim 1, wherein the handset performs satellite communications with a satellite provider when operating in the wireless mode.

5. The subscriber interface of claim 1, wherein the handset performs personal communication service based communications when operating in the wireless mode.

6. The subscriber terminal of claim 1, wherein the handset automatically switches to the wireless mode upon detection of the loss of communications.

7. A method for providing telephony communications in the event of a loss of power to a subscriber terminal, comprising the steps of:

establishing telephony communications through a fiber optic connection from a fiber optic source with the subscriber terminal;

providing telephony communications between the subscriber terminal and a handset operating in a cordless mode;

detecting a loss of power to the fiber optic source when the handset is within a cordless range of the fiber optic connection;

placing the handset in a wireless mode in response to the loss of power; and

providing telephony communications through a wireless communications system from the handset.

8. The method of claim 7, wherein the wireless communications system is a cellular communication system.

9. The method of claim 7, wherein the wireless communications system is a satellite communications system.

10. The method of claim 7, wherein the wireless communications system is a personal communication service based system.

11. The method of claim 7, further comprising the step of providing backup power to the subscriber terminal upon loss of the primary power.

12. The method of claim 7, further comprising the step of alerting an operator of the loss of communications to the subscriber terminal through the fiber optic connection.

13. A telecommunications system, comprising:

a wireless communication system in communication with a telecommunications network and operable to receive and transmit over-the-air telephony signals;

a telecommunication switch operable to communicate telephony signals with the telecommunications network;

an optical network unit coupled to the telecommunications switch and operable to communicate telephony signals with the telecommunications switch;

a subscriber terminal operable to exchange telephony signals with the optical network unit through a fiber optic connection;

a handset operable to exchange telephony signals with the subscriber terminal in a cordless mode during normal operation, the handset operable to exchange telephony signals with the wireless communication system in a wireless mode upon a loss of power to the optical network unit driving the fiber optic connection when the handset is within a cordless range of the subscriber terminal.

14. The telecommunications system of claim 13, wherein the handset automatically switches to the wireless mode in response to the loss of power to the subscriber terminal or with optical network unit.

15. The telecommunications system of claim 13, wherein the subscriber terminal includes a backup power supply for supplying back-up power to the subscriber terminal upon the loss of power to the subscriber terminal.

16. The telecommunications system of claim 13, wherein the wireless communication system includes a cellular, satellite, or personal communication service based system.

17. The telecommunications system of claim 13, wherein the handset is operable to function as a cordless telephone for communicating directly to the optical network unit upon the occurrence of the communication failure through the fiber optic connection between the subscriber terminal and the optical network unit.