System for protection link supervision

Details System for protection link supervision System for protection link supervision

2007-08-14

2007-08-14

Chung, Phung My (Department: 2138)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Transmission facility testing

C714S715000, C370S242000

Reexamination Certificate

active

10526720

ABSTRACT:
In a transmission network utilizing link fault protection between nodes, a working and a standby transmission line are terminated at each node with termination boards. The termination boards are adapted to report faults to a link supervision block. The link supervision block is adapted to switch between transmission lines in case of a fault. One or more persistency timers are coupled between the termination boards and the supervision block. A predetermined persistency period is applied to received fault cause(s) from the termination boards and correlated. The persistence of the correlation result is also timed and traffic is switched from one of the transmission lines to the other according to a predetermined correlation result persistency timer period.

REFERENCES:
patent: 6011778 (2000-01-01), Kilkki et al.
patent: 6294991 (2001-09-01), Bengston et al.
patent: 6590864 (2003-07-01), Suzuki
patent: 6766482 (2004-07-01), Yip et al.
patent: 7130275 (2006-10-01), Gross et al.

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