Patent Number: 8,879,691

Title: Autonomous metallic supervision with sealing current

Abstract: A system, method, and computer readable medium for a metallic test method in a digital subscriber line system in which a subscriber's voice service has been switched from plain old telephony service to an inband digital subscriber line data stream characterized in that a direct current loop current used for plain old telephony service is replicated for testing, comprising, providing a sealing line current to a transmission line via a digital subscriber line device serving the subscriber and supervising the provided sealing line current between the digital subscriber line device and a subscriber's premises for determining a connectivity therebetween.

Inventors: Ploumen; Franciscus Maria (Winsor, CA), Franceschini; Paul (Petaluma, CA)

Assignee: Alcatel Lucent

International Classification: H04M 1/24 (20060101)

Expiration Date: 2019-11-04 0:00:00