Sansay session controllers help service providers worldwide maximize the performance and profitability of VoIP networks and services while minimizing capital and operating expenses. Used by more than 300 referenceable customers worldwide, our VSXi VoIP Session Controllers support multiple applications–wholesale, residential, prepaid, SIP trunking, and hosted business voice services — with the industry's most extensive routing, peering, and security capabilities.

The VSXi is the highest performing session control platform in the market today. A single VSXi node scales to 1200 cps and 25K sessions. VSXi clusters of 16 nodes scale to 19,200 cps and 400,000 sessions — all with greater than 99.999% availability. The carrier–grade VSXi can be positioned at the core or edge of the network to manage VoIP traffic between SIP proxies, SIP UAs, H.323 gateways, IP-PBXs and H.323 gatekeepers.

Sansay's routing tables and LCR capabilities optimize bandwidth costs in a variety of VoIP peering applications, allowing carriers to interconnect without requiring traditional class 4 TDM switches in the call path. Replacing the relevant Class 4 functions–call routing, CDR generation, security and network privacy–the VSXi also acts as the "billing switch" between carriers at a fraction of the cost. VOIP providers can move the peering function off softswitches and gatekeepers to make networks more secure and reliable, and a wide range of services more profitable.

In access applications, Sansay's VSXi VoIP session controller works in conjunction with Class 5 switches, feature servers and gateways. The VSXi also enables a broad range of differentiated services while ensuring interoperability and secure firewall/NAT/call admission control. The VSXi also acts as a registrar.

Enforcing the Borders of Quality, Cost

Sansay's VSXi session controllers protect network topography while preventing denial of service (DoS) attacks to keep service provider infrastructures secure within the internal VPN. Our SBCs support SLAs and eliminate the voice quality degradation and delays caused by multiple compression/decompressions when TDM equipment is used to switch VOIP calls between carriers. Sansay also interconnects to leading ENUM databases to enable providers to minimize costs by completing calls using all-VoIP networks whenever possible..

Architected for profitable growth for both niche applications to the world's largest VoIP carriers, Sansay helps reduce not only the costs of building and managing networks, but of operating services themselves. Performing multiple functions, the VSXi minimizes the cost and complexity associated with maintaining extra gateways, softswitches and port licenses.

Don't Take Our Word For It.

Sansay session controllers are the building blocks of networks that perform to expectations, but don't take our word for it. Our products are utilized by nearly 300 referenceable service providers worldwide many of whom will gladly talk about us. We also offer free trials of VSXi products to qualified service providers.

For more information about the Sansay VSXi Session Controller, download and view our datasheet here.


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