Intel SIU520 SS7 manual Connection to an Adjacent Mated STP Pair

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

Single Point Code

Link Set id 1

Inter-SIU

Link Set

SIUA

Link Set id 0

A-Links

SIUB

Link Set id 2

STPA

SSP/SCP

STPB

Figure 7. Dual-resilient SIUs Connected to a Mated STP Pair in a Straight Link Configuration

Single Point Code

Link Set id 1

Inter-SIU

Link Set

SIUA

Link Set id 0

SIUB

STPA

SSP/SCP

STPB

Link Set id 2

Figure 8. Dual-resilient SIUs Connected to a Mated STP Pair in a Crossed Link Configuration

In case (A), since the F-links all exist in the same link set, messages may be sent from the adjacent SSP/SCP to either SIUA or SIUB. If an SIU receives a message from the SS7 network for a circuit or transaction that it does not control, this receive message is passed automatically to the other SIU for processing via the TCP/IP LAN.

Connection to an Adjacent Mated STP Pair

There are two ways of connecting a pair of SIUs to a mated STP pair. In the first method, the straight link configuration, each SIU is configured with two link sets: one link set containing STP-facing links, plus the inter-SIU link set. The straight link configuration consists in connecting SIUA to STPA and SIUB to STPB, as shown in Figure 7.

The second method, the crossed link configuration, consists of adding crossed link connections between SIUA and STPB and between SIUB and STPA to the previous mode. In a crossed link configuration, each SIU

is configured with three linksets: two link sets containing the links towards each STP, plus the inter-SIU link set (see Figure 8). The configuration of the DPC will contain the link set IDs of the two link sets connected to the STPs. Load sharing can be enabled to take advantage of all the system resources. In such a configuration, the inter-SIU link set is not used for traffic failover, but only for synchronization of network management messages. Consequently, a single link within this link set is fairly enough, giving an increased bandwidth for network- facing links.

The inter-SIU link must be carefully dimensioned as it will have to support the outgoing traffic of the SIU that would have lost its entire network-facing links, as shown in Figure 9. Again, a common practice is to allocate a fourth of the total number of network-facing links in the inter- SIU link set.

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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 RequirementsConfiguring the Inter-SIU Link System ConfigurationChanges to the config.txt Parameter File Example Configuration Routing ConfigurationCircuit Group Configuration For Siub Connecting a Host to Two SIUsFor Siua Transferring Control of a Circuit Group between SIUs Communicating with Both Siua and SiubGCTsetinstance GCTgetinstanceRe-synchronization of Circuit State Information Transferring the Circuit GroupCircuit Group Conflict Recovery of the Failed UnitTransferring Control Back What happens if the Ethernet interfaces fail on an SIU? How can I tell if an SIU fails?If an SIU fails do I need to take any action? What happens if an inter-SIU SS7 link fails?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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