The company's SitePathMTPX appliances create logical paths between sites using all the available Internet links connecting to business sites.

A SitePath device sits at each site inline with Internet routers and monitors the performance of all possible paths between sites. It directs traffic to the best path -- the one with the least latency and the most bandwidth.

If a link fails, the device directs traffic to an alternative path and can do so without losing VPN tunnels that may be using the downed path.

With its new software release, Elfiq is making it possible to make use of more than one path at a time by multiplexing data over more than one path. Before, the devices could identify multiple paths, but had to pick just one based on characteristics of the path and policies set by users.

Customers set how they define the best path using available bandwidth and latency as determining factors.