Method and apparatus for detecting ring trip precursors
AssigneeMicrosemi Semiconductor (U.S.) Inc.
InventorsYadunandan Nagarajaiah, Michel Darveau
Life of this patent
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Abstract
A method for controlling a ringing signal includes generating a ringing signal on a subscriber line, detecting a condition indicative of the subscriber line going off-hook and reducing an amplitude of the ringing signal responsive to detecting the condition. A line card includes a subscriber line interface circuit operable to generate a ringing signal on a subscriber line and a subscriber line audio-processing circuit operable to detect a condition indicative of the subscriber line going off-hook and reducing an amplitude of the ringing signal responsive to detecting the condition.
Claims22
A method for controlling a ringing signal, comprising:
- generating a ringing signal on a subscriber line;
- detecting a condition indicative of the subscriber line going off-hook;
- reducing an amplitude of the ringing signal responsive to detecting the condition.
A line card, comprising:
- a subscriber line interface circuit operable to generate a ringing signal on a subscriber line;
- and
- a subscriber line audio-processing circuit operable to detect a condition indicative of the subscriber line going off-hook and reducing an amplitude of the ringing signal responsive to detecting the condition.
Dependencies are inferred from the claim text.