Intel SIU520 SS7 manual Failure of Power Supply, Failure of Signaling Interface Unit

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Application Note Building Fault-tolerant SS7 Systems Using the Intel® NetStructure™ SIU520 SS7 Signaling Gateway

Ethernet

SIUA

API Layer/Ethernet Driver

Application

Ethernet

SIUB

API Layer/Ethernet Driver

MAP or INAP

or IS41

 

 

 

ISUP

TUP

 

TCAP

 

 

 

 

 

SCCP

Distributed Layer 4

Management

Distributed MTP3

Management

MAP or INAP

or IS41

TCAP

SCCP

ISUP

TUP

MTP Levels 1-3

SS7

MTP Levels 1-3

SS7

Link Set

Figure 5. Dual SIU Architecture

Failure of Power Supply

Problem — Ensuring that the unit survives the loss of one power supply and making it possible to replace a failed power supply without affecting the availability of the system.

Solution — The Intel NetStructure SIU520 SS7 signaling gateway can be optionally configured with a redundant and hot swappable power supply.

Details — Please refer to Intel NetStructure SIU520/Intel NetStructure SG430 Hardware User Manual, Issue 3 to obtain part numbers for redundant power supplies for the SIU520.

Failure of Signaling Interface Unit

Problem — Since the SIU520 provides an SS7 interface to a distributed application, it is usually deployed for high-density service platforms. Should the SIU of a single SIU-based system fail, many resources (telephony cir- cuits to TCAP dialogues) would become unavailable and would cause major service disruption.

Solution — A major feature of the SIU architecture is that two units can be configured to operate as a single entity, sharing the same local SS7 point code. In normal operation, signaling can be shared between two units. In the event of a failure, signaling is maintained by the remaining unit.

Details — In a dual configuration, one unit is assigned as SIUA, the other as SIUB. Under normal operation, the application uses both the resources of SIUA and SIUB (see Figure 5).

The distributed layer 4 management is achieved using a LAN connection and allows SS7 messages for any trans- action or call to be received by either unit, regardless of the unit that is actually processing the call or transaction.

The distributed MTP3 functionality is achieved using a specially configured inter-SIU link set, containing one or more signaling links. Transmit messages from each SIU are load shared between links that connect to the local SIU, if these are available. If all local network-facing SS7 links have failed, transmit messages are relayed to the

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Contents Application Note Intel CommunicationsTable of Contents Table of Figures Abstract SIU Circuit-switched API OperationManagement Interface Transaction-based API OperationSIU Connected to Adjacent Node with Two Links in Link Set Failure of SS7 LinksLink Failure of RoutesFailure of Signaling Interface Unit Failure of Power SupplyRouting Architectures of a Dual-resilient SIU System Connection to a Single Adjacent Signaling PointConnection to an Adjacent Mated STP Pair Compares the advantages and disadvantages of these methods SS7 Dual SIU Architecture for Circuit-Switched ApplicationsMTP1-3 Circuit Group Active Inactive MTP1-3 Siua Siub Dual SIU Architecture for Transaction-based ApplicationsSS7 Failure of Application Failure of IP SubnetworkSIU520 HostInter-SIU Link over Crossed E-1/T-1 Cable Hardware RequirementsSystem Configuration Changes to the config.txt Parameter FileConfiguring the Inter-SIU Link Routing Configuration Circuit Group ConfigurationExample Configuration Connecting a Host to Two SIUs For SiuaFor Siub GCTsetinstance Communicating with Both Siua and SiubGCTgetinstance Transferring Control of a Circuit Group between SIUsRe-synchronization of Circuit State Information Transferring the Circuit GroupRecovery of the Failed Unit Transferring Control BackCircuit Group Conflict If an SIU fails do I need to take any action? How can I tell if an SIU fails?What happens if an inter-SIU SS7 link fails? What happens if the Ethernet interfaces fail on an SIU?Route Ten Parsippany, NJ Phone

SIU520 SS7 specifications

The Intel SIU520 SS7 is a significant advancement in the realm of telecommunications, specifically designed for seamless signaling in a wide array of telecommunication infrastructures. As a part of Intel's pioneering suite of products, the SIU520 plays a critical role in managing signaling for telephony systems that require efficient handling of SS7 protocols.

One of the main features of the SIU520 is its support for the SS7 signaling protocol, which is pivotal for the establishment and management of telephone calls over traditional circuit-switched networks. With its robust design, the SIU520 ensures reliability in signaling, contributing to the reduction of call set-up times and the minimization of errors, thus enhancing the overall quality of communication services.

The SIU520 incorporates advanced technologies such as high-speed data processing capabilities, allowing it to handle multiple signaling messages concurrently. This is particularly important in environments with high call volumes, where efficient processing can significantly affect the performance of telecommunication services. Furthermore, the architecture of the SIU520 is designed for scalability, enabling easy integration into existing infrastructures while accommodating future expansions as demand increases.

Another characteristic that sets the SIU520 apart is its support for various signaling types beyond standard SS7, including ISDN and SIP. This makes it a versatile tool for service providers aiming to offer diverse services, such as voice, video, and data communications. The SIU520 is also designed with a focus on interoperability, which ensures that it can effectively communicate with equipment from different manufacturers, thus providing flexibility in deployment.

In terms of security features, the SIU520 is architected to withstand common threats in the communication landscape. It employs encryption and authentication protocols to safeguard signaling traffic, ensuring that sensitive information remains protected during transmission.

In summary, the Intel SIU520 SS7 represents a robust and flexible signaling solution crucial for modern telecommunications. With its support for multiple protocols, high processing speeds, scalability, and secure communication capabilities, it stands as a testament to Intel's commitment to advancing telecommunication technologies and enhancing the efficiency and reliability of communication networks worldwide.
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