Patent
Configurable scalable communications equipment protection method system
TLDR
In this paper, the authors propose a method and system for configurable and scalable line interface card protection or redundance useful for a range of low speed digital to high speed digital and optical signal types such as STS 1, STS 3, VT 1.5, DS 1/T1, DS 3/T3, ATM, ADSL, HDSL, OC 1, OC 2, OC 3, OC 4, OC 5, OC 6, OC 7, OC 8, OC 9, OC 10, OC 11, OC 12, OC 48, OC 192Abstract:
A method and system for configurable and scalable line interface card protection or redundance useful for a range of low speed digital to high speed digital and optical signal types such as STS-1, STS-3, VT1.5, DS-1/T1, DS-3/T3, ATM, ADSL, HDSL, OC-1, OC-3, OC-12, OC-48, OC-192, OC-768, STM-1, STM-4, STM-16, STM-64, E1, E3, J1, J2, and EtherNet and Token Ring LAN signals. A daisy-chain alternate signal path, signal selectors, and alternate front panel entry points are provided to a front-access telecommunications shelf system. Signal interface cards can be designated as primary cards to handle traffic under normal conditions, or as protection cards, without hardware constrained or slot-specific card requirements. Variations of 1:N protection, and multiple groups of 1:N configurations and partitions can be defined without changes to cabling or backplane design variations through setting of relays and signal selectors on each card. As such, any signal present on a cable connected to a primary card may be re-routed to any card designated as a protection card, by first routing the signal through a protection relay on the failed card to a cable to a neighboring card, through a data selector on the neighboring card onto the backplane, and to a selected protection card.read more
Citations
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References
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Patent
Apparatus and methods for providing fault tolerance of networks and network interface cards
TL;DR: In this article, the authors propose a network fault-tolerant network middleware, which resides with each node in a logical hierarchy above a physical layer of a network and below a transport layer of the network.
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