Configuration Example - SR

M2PA Signaling Router (SR) Configuration

Link concentration and enhanced MTP3 network reliability
However, to some, SS7 tunneling and back-hauling is just an interim solution and the preferred longer term option is to convert the SS7 into one of the SIGTRAN adaptation layers and IP-enable the STP. With a straightforward software upgrade, the AdaxGW can be configured as a Signaling Router (SR) for simple and cost-effective SS7 to SIGTRAN translation using M2PA. The SR can reduce costs by bridging large numbers of T1/E1 circuits onto lower cost IP networks while maintaining service reliability. If the STP is IP-enabled, the SR would be used at the network edge to convert the SS7 to IP. If the STP is not IP-enabled, this conversion can be achieved quickly by placing an AdaxGW in front of the STP. As the AdaxGWs support M2PA, M2UA and M3UA, the STP can then communicate with the full range of IP-enabled devices with enhanced network reliability and robustness.

M2PA to SS7 Interworking Protocol Stacks

The SR configuration is a multi-protocol solution that performs interworking between full MTP3/MTP2 and M2PA. It terminates SS7 traffic and delivers it directly to either IP-enabled STPs or SS7 devices via another signaling gateway. The SR is designed for companies that need to eliminate costly T1/E1 lines, combine legacy systems with IP-enabled devices and/or need MTP3 routing capabilities. The SR provides complete connectivity for SS7/IP conversion as it incorporates full MTP3 on the SS7 side, and interworking between the MTP3 and M2PA on the IP side. The SR can be used at the network edge to convert SS7 to IP for connecting to IP-enabled STPs, or the SR can sit in front of an STP to IP-enable it.

M2PA to M2UA Interworking Protocol Stacks

M2PA (MTP2 Peer-to-Peer Adaptation Layer for SS7 over IP) is at the heart of the SR and is designed to transport SS7 MTP3 signaling messages over IP using the services of SCTP. The MTP3 layer at the IP node communicates with M2PA as if it were regular MTP2. Together SCTP and M2PA perform the functions of, and are almost a direct replacement for, MTP2, providing a highly reliable transmission service to the signaling layer above it. M2PA functionality includes data retrieval to support MTP3 changeover procedure, link alignment procedure, and the reporting of link status changes to MTP3.

The SR can also interwork M2PA and M2UA by receiving M2PA and sending it out as M2UA for connection to remote Media Gateways and other Layer 2 interworking gateways.

M2PA Interworking with the SR configuration

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