Intel SIU520 SS7 manual Transaction-based API Operation, Management Interface, E-1 or T-1 Trunks

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

CT Application Platform

}E-1 or T-1 Trunks, Voice Circuits Only

CT Application Platform

SIU520	}	E-1 or T-1 Trunks
SS7		with SS7 Channel
		and Voice Circuits
Information

Ethernet

Figure 2. Integrating the SIU520

Transaction-based API Operation

TCAP-based applications can be distributed on multiple application hosts using two different methods which are explained in details further in this document (see “Failure of Applications”, pg. 15). These methods imply running TC-user application parts (such as GSM-MAP, INAP, or IS-41) on each application host. When running any application part above TCAP on the SIU520 itself, the product allows operation of a single host application.

Management Interface

The SIU520 constantly monitors the state of its physical connections, PCM trunk inputs, the communication channel via TCP/IP Ethernet to the host processors and reports status information to an application process running on a user-defined host. The host elected to receive management messages can be selected by sending an API_MSG_COMMAND management request. (See the Intel NetStructure SIU520 Developer’s Manual for more information.) Host 0 is used by default.

Potential Points of Failure

In this section, the most critical points of failure of an Intel NetStructure SIU520 SS7 signaling gateway-based sys- tem are reviewed. The list of potential points of failure include:

■SS7 links

■SS7 routes

■Power supply

■Signaling interface unit

■IP subnetwork

■Application host

For each of these points of failure, a solution is provided and implementation details are given.

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