System and method for special signaling with customer premises equipment

• US 7,020,164 B1
• Filed: 12/13/2002
• Issued: 03/28/2006
• Est. Priority Date: 11/30/1998
• Status: Expired due to Term

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Singleton, Gregory L., McCullough, Jason F, Spooner, Andrew M., Boyd, Ramona L.
• Primary Examiner(s): Kizou, Hassan
• Assistant Examiner(s): Cho, Hong Sol
• Application Number:
  US10/318,751
• Time in Patent Office: 1,201 Days
• Field of Search: 370/352, 370/355, 370/356, 370/357, 370/480, 370/493, 370/496, 379/90.01, 379/93.01, 379/142.01, 379/251, 379/352, 379/418, 379/900
• US Class Current: 370/480
• CPC Class Codes: H04M 11/062 using different frequency bands for speech and other data

Abstract

A system and method are provided for special signaling with customer premises equipment. The system includes loop termination equipment coupled to a local loop and comprising a signal generator. The system also includes customer premises equipment coupled to the local loop. The customer premises equipment and loop termination equipment are operable to communicate across a communication link established on the local loop. The loop termination equipment is further operable to control characteristics of a signal generated by the signal generator and to provide the signal to the customer premises equipment as special signaling where the signal has a frequency that does not substantially interfere with voice traffic on the local loop. The special signaling can be used to implement enhanced service to the customer premises including busy signal, queued data request processing, push data and telephony services.

Claims

1. Loop termination equipment comprising:

a signal generator;

a plurality of digital subscriber line (DSL) modems; and

a digital subscriber line access multiplexer (DSLAM) operable to couple to customer premises equipment using a local loop, the DSLAM further operable to receive a request for service from the customer premises equipment, to determine that none of the DSL modems are available to service the customer premises equipment and, in response to the determination, to control characteristics of a signal generated by the signal generator and to provide the signal to the customer premises equipment as special signaling, the signal having a frequency that does not substantially interfere with voice traffic on the local loop, and wherein the DSLAM provides the signal to the customer premises equipment as a queued request signal in response to placing the customer premises equipment in a request queue.

2. The loop termination equipment of claim 1, wherein the DSLAM provides the signal to the customer premises equipment as a busy signal in response to the request for service.

3. The loop termination equipment of claim 1, wherein the DSLAM provides another signal generated by the signal generator to the customer premises equipment as a re-issue request signal in response to retrieving the customer premises equipment from the request queue.

4. The loop termination equipment of claim 3, wherein the DSLAM is further operable to receive a second request for service from the customer premises equipment and, in response to the second request, to establish an xDSL communication link between the customer premises equipment and an available one of the DSL modems.

5. The loop termination equipment of claim 3, wherein the DSLAM is further operable to monitor for a second request for service from the customer premises equipment and, in response to failing to receive the second request, to remove the customer premises equipment from the request queue.

6. The loop termination equipment of claim 1, wherein the DSLAM is further operable to process the request queue using first-in-first-out processing.

7. The loop termination equipment of claim 1, wherein the loop termination equipment controls the frequency of the signal generated by the signal generator.

8. The loop termination equipment of claim 1, wherein the signal generator is operable to generate special signals for indicating a plurality of events, a special signal indicating a particular event based upon distinguishing characteristics of the special signal.

9. Loop termination equipment comprising:

means for receiving a request for service from customer premises equipment;

means for determining that none of a plurality of digital subscriber line (DSL) modems are available to service the customer premises equipment;

means for generating a signal having a frequency that does not substantially interfere with voice traffic on a local loop; and

means for providing the signal as special signaling across the local loop to customer premises equipment to provide a queued request signal in response to placing the customer premises equipment in a request queue.

10. The loop termination equipment of claim 9, wherein the means for providing the signal operates to provide a busy signal to the customer premises equipment.

11. The loop termination equipment of claim 9, wherein the means for providing the signal operates to provide a re-issue request signal in response to retrieving the customer premises equipment from the request queue.