F5 Networks has agreed to buy Traffix Systems, an Israeli company whose behind-the-scenes signaling technology helps mobile operators manage all that data flowing across their networks, thanks to all those smartphones, tablets and other devices we’re using these days.

Traffix specializes in what’s known as the Diameter signaling protocol, which has emerged as the standard for systems to communicate with each other across 4G/LTE networks. Seattle-based F5 helps companies manage their IP traffic and file storage infrastructure. It’s betting that the addition of the Traffix technology to its mix will make its products more attractive to mobile carriers making the transition to 4G networks.

Financial terms of the deal weren’t disclosed. Business publication Globes reports that Traffix, founded in 2005, had raised $13 million in funding.

Update: Traffix, with operations in Israel, employs less than 100 employees. At the close of the deal, Traffix staffers will become F5 employees.

“F5 intends to grow and invest in the Traffix operations in Israel, building the team and supporting the existing product,” according to a F5 spokeswoman. “Traffix CEO Ben Volkow and his management team will remain in place to continue to drive the product’s success.”

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