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

A)Normal routing case (both network link sets available) Single Point Code

Link Set id 1

Inter-SIU

Link Set

Link Set id 0

SIUA

SIUB

A-Links

Link Set id 2

STPA SSP/SCP

C-Links

STPB

B) Routing under failure of network link set between SIUA and adjacent STP

 

Single Point Code

 

Inter-SIU

Link Set id 1

 

 

 

Link Set

 

 

SIUA

 

SSP/SCP

 

 

Link Set id 0

A-Links

 

SIUB

 

C-Links

 

Link Set id 2

STPB

Transmit Traffic from SIUA

 

 

 

Transmit Traffic from SIUB

 

 

 

Figure 9. Transmit Routing Through Mated STPs

Table 1 compares the advantages and disadvantages of these methods.

Table 1. Comparison of a Straight Link Configuration vs. a Crossed Link Configuration

Comparison Subject

Straight Configuration

Crossed Configuration

 

 

 

Load sharing

-

+

 

STPA can only load share traffic

Each STP can load share between the two SIUs,

 

for SIUA and vice-versa

optimizing the resource utilization

 

 

 

Network-facing links

+

-

failure

SIUA can rely on SIUB to send

When an SIU loses its network-facing links, the

 

outgoing traffic upon failure of its

application must activate circuit groups on the

 

entire network-facing links

surviving SIU (for ISUP-based application)

 

 

 

Inter-SIU link set

-

+

dimensioning

Need to allocate 1/4 of all

Need to allocate a single link, maximizing the

 

network facing links (e.g., 16

number of network-facing links (e.g., 22 network facing

 

network facing links and four

links and one inter-SIU link). Allocating a single link means

 

inter-SIU links)

there are two single points of failure in the system.

 

 

For best resilience, the inter-SIU link set should contain

 

 

two links spread across two cards in each SIU.

 

 

 

9

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Intel SIU520 SS7 manual Compares the advantages and disadvantages of these methods

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.