Intel SIU520 SS7 - Manuals

Overview of SIU Operation The Intel NetStructure SIU520 SS7 signaling gateway is an SS7 network access product that provides a resilient interface to SS7 networks via a TCP/IP local area net- work (LAN). As shown in Figure 1, SIU520 software includes SS7 protocol layers, as well as a configuration a...

Transaction-based API Operation TCAP-based applications can be distributed on multipleapplication hosts using two different methods which areexplained in details further in this document (see “Failureof Applications”, pg. 15). These methods imply runningTC-user application parts (such as GSM-MAP, IN...

Failure of SS7 Links Problem — With a single link to the adjacent signaling point, service is disrupted if the link goes down for somereason (i.e., layer 1 alarm, congestion). Solution — Link resiliency is achieved by using multiple links between a local point code and an adjacent pointcode. By defi...

Failure of Routes Problem — With a single route to a destination point code (DPC), service can be disrupted if all the links of the link set used to reach that signaling node fail. Route failover is a standard MTP3 operation which does not require any specific action from the user application. Solut...

Failure of Power Supply Problem — Ensuring that the unit survives the loss of one power supply and making it possible to replace afailed power supply without affecting the availability of thesystem. Solution — The Intel NetStructure SIU520 SS7 signaling gateway can be optionally configured with a re...

partner SIU across the inter-SIU link set and sent out tothe adjacent signaling point by the partner unit. The inter-SIU link set also provides the capability of messageretrieval and retransmission when a changeover operationoccurs between the two units. ■ For circuit-switched applications, the circ...

In case (A), since the F-links all exist in the same link set,messages may be sent from the adjacent SSP/SCP toeither SIUA or SIUB. If an SIU receives a message fromthe SS7 network for a circuit or transaction that it doesnot control, this receive message is passed automaticallyto the other SIU for ...

Dual SIU Architecture for Circuit-SwitchedApplications Within the SIU environment, circuits are configured in groups, each group equating to all the circuits multiplexed onto a single E-1 or T-1 PCM trunk. The SIU provides the SS7 circuit control and the application platform (or host) terminates the...

In the second case, each unit controls half of the totalavailable transactions. (The Intel NetStructure SIU520SS7 signaling gateway supports up to 16,384 transac-tions. A dual-resilient system can consequently handle upto 32,768 simultaneous transactions.) Each transaction isprocessed for its entire...

Failure of IP Subnetwork Problem — Should one subnetwork go down due to a network component failure, the hosts connected to theSIU over the other subnetworks will remain active andattempt to preserve half of the total system capacity. Solution — There are two Ethernet ports on the SIU520. This allow...

TCAP Resiliency Based on DTS/DTC Option Alternatively, it is possible to distribute SCCP traffic tomultiple application hosts using the distributed transac-tion server/distributed transaction client (DTS/DTC) soft-ware option, as shown on Part B of Figure 13. In thisarchitecture, TCAP and potential ...

Configuring a Dual SIU Pair To create a dual-resilient configuration for the Intel NetStructure SIU520 SS7 signaling gateway, modifications are required to both the system configuration (done using the man machine interface [MMI]) and the protocol configuration (in the config.txt parameter file). Th...

The inter-SIU signaling link set can be configured to useany signaling processor on any signaling card and maybe carried on any of the available interfaces on thesignaling card. If V.11 interfaces are used to carry the SS7 signalingbetween the SIU and the network (this is typically thecase in North ...

For an SIU pair connected to a mated STP pair, carryingthe inter-SIU link over the second E-1 port of the firstsignaling card the configuration (Figure 20) would be: For SIUA MTP_CONFIG 0 0 0x0000MTP_LINKSET 0 300 1 0x8000 300 0x8MTP_LINKSET 1 400 1 0x0000 300 0x8MTP_LINK 0 0 0 0 1 1 1 1 0 0x4006MTP...

Communicating with Both SIUA and SIUB The user application exchanges information with the SIUvia API messages (MSG). In a dual SIU environment,each time the user application sends a message to theSIU, this should be directed to either SIUA or SIUB usinga library function GCT_set_instance . In the re...