Intel SIU520 SS7 Manuale Utente

Intel inCommunicationsBuilding Fault-tolerant SS7Systems Using the Intel®NetStructure™ SIU520 SS7 Signaling GatewayApplication Note

partner SIU across the inter-SIU link set and sent out tothe adjacent signaling point by the partner unit. The inter-SIU link set also provides the ca

In case (A), since the F-links all exist in the same link set,messages may be sent from the adjacent SSP/SCP toeither SIUA or SIUB. If an SIU receives

Table 1 compares the advantages and disadvantages of these methods.Table 1. Comparison of a Straight Link Configuration vs. a Crossed Link Configurati

Dual SIU Architecture for Circuit-SwitchedApplicationsWithin the SIU environment, circuits are configured ingroups, each group equating to all the cir

If all the links between the controlling SIU and theadjacent signaling point fail, all transmit traffic isautomatically routed to the adjacent signali

The circuit group control will then appear as shown inFigure 12.The user application software should reset all idle circuitsfollowing a transfer, and

Dual SIU Architecture for Transaction-basedApplicationsThere are two ways of architecting a dual-resilientSIU520-based system for processing TCAP tran

In the second case, each unit controls half of the totalavailable transactions. (The Intel NetStructure SIU520SS7 signaling gateway supports up to 16,

Failure of IP SubnetworkProblem — Should one subnetwork go down due to anetwork component failure, the hosts connected to theSIU over the other subnet

TCAP Resiliency Based on DTS/DTC OptionAlternatively, it is possible to distribute SCCP traffic tomultiple application hosts using the distributed tra

Building Fault-tolerant SS7 Systems Using the Intel®NetStructure™ SIU520 SS7 Signaling Gateway Application NoteTable of ContentsAbstract 1Introduction

Configuring a Dual SIU PairTo create a dual-resilient configuration for the IntelNetStructure SIU520 SS7 signaling gateway,modifications are required

The inter-SIU signaling link set can be configured to useany signaling processor on any signaling card and maybe carried on any of the available inter

using the MTP_LINK command, assigning incrementing<link_ref> and <slc> values as normal. The <bpos>and <blink> parameters defi

For an SIU pair connected to a mated STP pair, carryingthe inter-SIU link over the second E-1 port of the firstsignaling card the configuration (Figur

Communicating with Both SIUA and SIUBThe user application exchanges information with the SIUvia API messages (MSG). In a dual SIU environment,each tim

conc_id on the host (conc_id is set when the RSI linkwas started, optionally by rsicmd). This message willonly be received by the application if the R

Recovery of the Failed UnitThe host application is informed of recovery of thecommunication to the SIU with the same method usedfor notification of th

Appendix A: Frequently Asked QuestionsQ: How can I tell if an SIU fails?A: The status of the communication between the hostand the SIU is indicated by

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Application Note Building Fault-tolerant SS7 Systems Using the Intel®NetStructure™ SIU520 SS7 Signaling GatewayTable of FiguresFigure 1 Structure of

AbstractIn order to achieve five-nines (99.999%) reliability and ahigh degree of fault tolerance in an SS7 environmentusing Intel®NetStructure™ SIU520

Overview of SIU OperationThe Intel NetStructure SIU520 SS7 signaling gateway isan SS7 network access product that provides a resilientinterface to SS7

Transaction-based API OperationTCAP-based applications can be distributed on multipleapplication hosts using two different methods which areexplained

Failure of SS7 LinksProblem — With a single link to the adjacent signalingpoint, service is disrupted if the link goes down for somereason (i.e., laye

Failure of RoutesProblem — With a single route to a destination pointcode (DPC), service can be disrupted if all the links of thelink set used to reac

Failure of Power SupplyProblem — Ensuring that the unit survives the loss ofone power supply and making it possible to replace afailed power supply wi