Line switching apparatus

Details Line switching apparatus Line switching apparatus

1996-03-20

1998-05-19

Marcelo, Melvin

Multiplex communications

Fault recovery

Bypass an inoperative switch or inoperative element of a...

370219, 370228, H04L 122

Patent

active

057545278

ABSTRACT:
A line switching apparatus is applied to a system which has a current system line and a spare system line, transmits identical ATM cell streams via the two lines, and adds protection switching cells to the ATM cell streams on a transmission side when line quality of the current system line deteriorates. The apparatus is adapted to switch a line to be used from the current system line to the spare system line in the system. The apparatus includes a first VPI converter, a multiplexer, a spare system line information read section, and a second VPI converter. The first VPI converter converts the VPI of the spare system line into a VPI different from the VPI of the current system line. The multiplexer detects a phase shift amount between the current and spare system lines on the basis of positions of the protection switching cells on the two lines, corrects the phase shift amount, and performs multiplexing processing of packing the cell stream on the spare system line, whose VPI has been converted, at empty cell positions of the cell stream on the current system line. The read section reads out the information of the spare system line from the multiplexed cell stream. The second VPI converter converts the readout cell stream on the spare system line into the initial VPI.

REFERENCES:
patent: 5465348 (1995-11-01), Amemiya et al.
patent: 5488606 (1996-01-01), Kakuma et al.
Anderson et al., "Fast Restoration of ATM Networks", IEEE Journal on Selected Areas in Communications, vol. 12, No.1, pp. 128-138, (1994).
"STM-N Protection Switching", CCITT G. 782, pp.15-17 (undated).

Affiliated with

Also associated with

Rating

Line switching apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Line switching apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Line switching apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1860380