Enabling and powering of remotely actuated bypass splitters

• US 6,553,105 B2
• Filed: 04/30/2002
• Issued: 04/22/2003
• Est. Priority Date: 03/01/2000
• Status: Expired due to Fees

• Current Assignee: Turnstone Systems, Inc.
• Original Assignee: Turnstone Systems, Inc.
• Inventors: Chea, Ramon C. W. Jr., Duffie, P. Kingston
• Primary Examiner(s): CHAN, WING F
• Application Number:
  US10/137,083
• Publication Number:
  US 20020131568A1
• Time in Patent Office: 357 Days
• Field of Search: 379/93.14, 379/93-5-, 379/102.01, 379/102.02, 379/1.04, 379/9, 379/22, 379/27.01, 379/27.06, 379/29.01, 379/414, 379/242, 379/268
• US Class Current: 379/93.14
• CPC Class Codes: H04L 43/50 Testing arrangements
• CPC Class Codes: H04M 11/062 using different frequency bands for speech and other data
• CPC Class Codes: H04M 2203/056 non-invasive testing, i.e. in operation testing without service interruption
• CPC Class Codes: H04M 3/2209 for lines also used for data transmission
• CPC Class Codes: H04M 3/30 for subscriber's lines , for the local loop
• CPC Class Codes: H04Q 11/0421 Circuit arrangements therefor
• CPC Class Codes: H04Q 2213/13039 Asymmetrical two-way transmission, e.g. ADSL, HDSL
• CPC Class Codes: H04Q 2213/1316 Service observation, testing
• CPC Class Codes: H04Q 2213/1319 Amplifier, attenuation circuit, echo suppressor
• CPC Class Codes: H04Q 2213/13298 Local loop systems, access network
• CPC Class Codes: H04Q 2213/13305 Transistors, semiconductors in general
• CPC Class Codes: H04Q 2213/1332 Logic circuits
• CPC Class Codes: H04Q 2213/13322 Integrated circuits

Abstract

The present invention is directed to a remotely actuated splitter bypass function (RASB) working in conjunction with a test head at the central office for testing and maintaining copper loops in the digital subscriber line environment. The RASB allows a competitive local exchange carrier to test and maintain the xDSL portion of the copper loop with minimal interference and disturbance to/from the plain old telephone system (POTS) service by bypassing the central office splitter. The splitter bypass operation includes the steps of selecting a copper loop pair for testing, actuating a first relay for monitor mode, actuating a second relay for bypass mode, testing the selected copper loop, and resetting the first and second relays back to normal mode. By applying positive and negative voltages from the tip and ring with respect to ground, various relays can be set (actuated) and reset to provide multiple modes of operations. In this manner, relays can be designed to respond in certain voltage levels and polarities.

Claims

1. A method of enabling a plurality of central office splitters coupled to a voice circuit and a xDSL circuit in a line sharing system, comprising:

(1) selecting a copper pair for carrying an enable signal;

(2) checking the presence of a signature for the selected copper pair to carry the enable signal;

(3) generating the enable signal from a cross connect; and

(4) transmitting the enable signal from the cross connect to the plurality of splitters through the selected copper pair, thereby enabling the plurality of splitters.

2. A method according to claim 1, wherein after the transmitting step, the plurality of splitters reverts to a default mode when the enable signal is not present.

3. A method according to claim 2, wherein the plurality of splitters reverts to the default mode using non latching relays in the splitters.

4. A method according to claim 1, wherein the selected copper loop that carries the enable signal terminates with a DC/DC converter.

5. A method according to claim 1, wherein the enable signal is a DC voltage.

6. A method according to claim 5, wherein the DC voltage is generated from a central office battery.

7. A method according to claim 6, wherein the DC voltage is 50±

6 volts.