Full duplex digital transmission facility loop-back test, diagnostics and maintenance system
US5343461A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1991 |
| Grant date | Aug 30, 1994 |
| Priority date | — |
| Expiry date | Aug 27, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/24
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A full duplex digital transmission, high-capacity digital, facility loop-back test, diagnostics and maintenance system having a digital transmission facility, transmission medium, and at least one microprocessor-based, full duplex facility loop-back diagnostics interface is located at predetermined end-user locations within the system. The system is capable of initiating a facility loop-back test and predetermined diagnostics for a predetermined digital transmission span and customer premises equipment at the location of the network interface for a specified end-user. The facility loop-back diagnostics interface has a performance monitoring mode of operation and a maintenance facility loop-back mode of operation. The diagnostics interface can be activated from a remote location and is compatible with and supports a particular protocol, specifically LAP-B protocol. The diagnostics interface has integral performance monitoring capabilities for nonintrusive multiple diagnostics testing and on-line monitoring of multiple predetermined performance characteristics for associated DS1 communications channels, or a specified DS1 communications channel, and customer premises equipment at the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.