Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Patent
1997-04-21
1999-10-26
Kizou, Hassan
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
370242, 370397, 370399, 370402, H04L 1256, H04L 1228, G06F 1100
Patent
active
059740450
ABSTRACT:
An OEM processing device for supporting operations, administration, and maintenance (OAM) in an ATM network, whose control circuit has a simplified configuration that avoids duplexity of common functions, thus realizing reduced size and less power consumption. A VPI/VCI extractor extracts VPI/VCI from each incoming ATM cell, while an alarm detector detects a physical layer alarm. An entry data memory stores a plurality of VPIs/VCIs that have been previously registered. When the extracted VPI/VCI is found in the registered VPIs/VCIs in the entry data memory, a VPI/VCI coincidence signal will be generated. When a physical layer alarm is detected by the alarm detector, all the relevant VPIs related to the detected alarm will be generated by using the same entry data memory. A VP-AIS cell generator then produces VP-AIS cells corresponding to the generated VPIs and inserts them into the current ATM cell stream.
REFERENCES:
patent: 5610913 (1997-03-01), Tomonaga et al.
patent: 5799003 (1998-08-01), Fujimaki et al.
patent: 5809012 (1998-09-01), Takase et al.
Mochizuki Hideaki
Ohkura Ritsuko
Fujitsu Limited
Kizou Hassan
Qureshi Afsar M.
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