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

Inter-SIU

Link Set

Link Set id 0

Link_id 0,

slc 0

Single Point

Code

SIUA

SIUB

Point

Code 100

Link id 1, slc 0

SSP/SCP

Link id 1, slc 1

Point

Code 200

Link Set id 1

Figure 19. Example Configuration to an Adjacent SSP/SCP

using the MTP_LINK command, assigning incrementing <link_ref> and <slc> values as normal. The <bpos> and <blink> parameters define which SS7 processor (there are three on each signaling card) manages each link. If a V.11 port is being used, <blink> must be either 1 or 2.

For a link using a PCM port, the physical location of the link is specified by setting stream and timeslot: stream 16 is the PCM port closest to the green LED on the signaling card, stream 17 the lower PCM port. To use a serial link, the MTP_LINK <flags> bit 14 should be set to 1, <stream> and <timeslot> both to 0. One of the units should act as the V.11 port clock master, the other as slave; hence, one SIU must also have <flags> bit 13 set to 1.

For example, to configure an inter SIU link, on linkset_id 0, to use V.11 port A on the first board in a SIU520, this command would be used to define a V.11 clock slave:

MTP_LINK 0 0 0 0 1 1 1 1 0 0x4006, while MTP_LINK 0 0 0 0 1 1 1 1 0 0x6006 would

define a V.11 port clock master.

Routing Configuration

A route should be defined on both SIUA and SIUB for the inter-SIU link set using the MTP_ROUTE command referencing the appropriate <linkset_id> with a <dpc> value set to the point code of the SIU pair. This route may only be specified to operate over a single link set.

Each DPC that may be accessed from the application must have an accompanying MTP_ROUTE declaration. For dual operation, each route includes a preferred link set, the <linkset_id> parameter, and a secondary link set specified by <second_ls>. linkset_id should refer- ence the link set connecting the SIU to the appropriate adjacent signaling point, second_ls must be set to the linkset_id assigned to the inter-SIU link set.

Circuit Group Configuration

For dual operation, each SIU should contain identical circuit group declarations using the appropriate ISUP_CFG_CCTGRP or TUP_CFG_CTGRP commands. These circuit group configurations do not become active on either unit until an Activate Circuit Group API command has been issued to a particular SIU.

Example Configuration

To define routing to the DPC 200 below (which is also the adjacent point code), using the first E-1 port on the first signaling card in a SIU520, the configuration (Figure 19) would be

For SIUA

MTP_CONFIG 0 0 0x0000

MTP_LINKSET 0 100 1 0x8000 100 0x8 MTP_LINKSET 1 200 1 0x0000 100 0x8 MTP_LINK 0 0 0 0 1 1 1 1 0 0x4006 MTP_LINK 1 1 0 0 1 2 1 2 16 0x0006 MTP_ROUTE 100 0 0x0020

MTP_ROUTE 200 1 0x0020 0x0001 0

For SIUB

MTP_CONFIG 0 0 0x0000

MTP_LINKSET 0 100 1 0x8000 100 0x8 MTP_LINKSET 1 200 1 0x0000 100 0x8 MTP_LINK 0 0 0 0 1 1 1 1 0 0x6006 MTP_LINK 1 1 0 1 1 2 1 2 16 0x0006 MTP_ROUTE 100 0 0x0020

MTP_ROUTE 200 1 0x0020 0x0001 0

(up_enable was set for ISUP, user part SI = 5 for the example above)

19

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Intel SIU520 SS7 manual Routing Configuration, Circuit Group Configuration, Example Configuration
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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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