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US 6,618,469 B2Granted
Circuits and methods for testing POTS service
AssigneeADC DSL Systems, Inc.
InventorsJie Dong Wang, Christopher S. Smith
Life of this patent
Estimating the term…
Abstract
Circuits for testing POTS service on a shared POTS/xDSL carrier include microfilters for selective coupling to the subscriber loop side of an xDSL filter associated with a subscriber line interface circuit. Such configurations facilitate testing of the POTS service using an insertion point that is between the xDSL filter and the subscriber loop in a manner that is transparent to subscribers.
Claims30
A system for testing POTS service on a line shared with xDSL service, the system comprising:
- a first microfilter selectively coupled to an xDSL filter on the line through a first relay;
- and
- a second microfilter selectively coupled to the line through a second relay;
- wherein the first and second relays are on a subscriber loop side of the xDSL filter;
- wherein the subscriber loop is decoupled from the xDSL filter when the first microfilter is coupled to the xDSL filter;
- and
- wherein the subscriber loop can remain coupled to the xDSL filter when the second microfilter is coupled to the line.
4 more elements
A telecommunications system, comprising:
- a subscriber line interface circuit;
- an xDSL transceiver;
- a communication line coupling the subscriber line interface circuit and the xDSL transceiver to a load;
- an xDSL filter on the communication line between the xDSL transceiver and the subscriber line interface circuit;
- a first relay on the communication line between the xDSL filter and the load;
- a second relay on the communication line between the xDSL filter and the load;
- a third relay on the communication line between the xDSL filter and the load;
- a first microfilter coupled to the first relay;
- and
- second microfilter coupled to the second relay;
- wherein the first microfilter is selectively coupled to the subscriber line interface circuit through the first relay;
- wherein the first relay decouples the load from the subscriber line interface circuit when the first microfilter it coupled to the subscriber line interface circuit;
- wherein the second microfilter is selectively coupled to the communication line through the second relay;
- wherein the second relay does not decouple the load from the subscriber line interface circuit when the second microfilter is coupled to the communication line;
- and
- wherein the third relay selectively decouples the load from the subscriber line interface circuit for coupling the load to a test port.
13 more elements
A telecommunications system, comprising:
- mean s for coupling a subscriber line interface circuit to a first microfilter or a subscriber load, wherein such means is located on a subscriber loop side of an xDSL filter coupled to the subscriber line interface circuit;
- means for coupling the subscriber load to the subscriber line interface circuit or a test port;
- and
- means for selectively coupling a second microfilter to the subscriber line interface circuit and the subscriber load.
1 more element
A method of testing POTS service on a line shared with xDSL service, the method comprising:
- coupling a test-in port of a metallic loop test set to a first microfilter;
- and
- coupling the first microfilter to a subscriber line interface circuit at a point located on a subscriber loop side of an xDSL filter associated with the subscriber loop interface circuit.
A method of testing POTS service on a line shared with xDSL service, the method comprising:
- coupling a first pair of leads of an RJ11 jack to a microfilter;
- coupling the microfilter to a subscriber line interface circuit at a point located on a subscriber loop side of an xDSL filter associated with the subscriber loop interface circuit;
- and
- decoupling the subscriber loop from the xDSL filter.
1 more element
A telecommunications system, comprising:
- a subscriber line interface circuit having a ring line and a tip line;
- an xDSL transceiver having a ring line and a tip line;
- an xDSL filter having a ring line coupled between the ring line of the xDSL transceiver and the ring line of the subscriber line interface circuit and having a tip line coupled between the tip line of the xDSL transceiver and the tip line of the subscriber line interface circuit;
- a first segment of carrier having a ring line and a tip line;
- a second segment of carrier having a ring line and a tip line coupled to a subscriber loop;
- a first switching device located between the xDSL filter and the first segment of carrier for coupling the ring line of the xDSL filter to either the ring line of the first segment of carrier or a ring line of a first microfilter;
- a second switching device located between the xDSL filter and the first segment of carrier for coupling the tip line of the xDSL filter to either the tip line of the first segment of carrier or a tip line of the first microfilter;
- a third switching device for coupling the ring line of the second segment of carrier to either the ring line of the first segment of carrier or a first node;
- a fourth switching device for coupling the tip line of the second segment of carrier to either the tip line of the first segment of carrier or a second node;
- a fifth switching device for selectively coupling the ring line of the first segment of carrier to a ring line of a second microfilter;
- a sixth switching device for selectively coupling the tip line of the first segment of carrier to a tip line of the second microfilter;
- a seventh switching device for selectively coupling the ring line of the second microfilter to the first node;
- an eighth switching device for selectively coupling the tip line of the second microfilter to the second node;
- a ninth switching device for coupling a third node to either the ring line of the first microfilter or the first node;
- and
- a tenth switching device for coupling a fourth node to either the tip line of the first microfilter or the second node;
- wherein the first microfilter is coupled between the first and second switching devices and the ninth and tenth switching devices;
- and
- wherein the second microfilter is coupled between the third and fourth switching devices and the fifth and sixth switching devices.
16 more elements
Dependencies are inferred from the claim text.