The company said Wednesday that it raised a first round of $7 million led by Bessemer Venture Partners to help it expand operations. Ben Volkow, the CEO, says that 60 percent of operators already have some Traffix gear on their networks to address and manage signaling traffic, but more operators are interested. As more operators began deploying LTE networks, which add to the complexity of signaling traffic and to the overall network, Volkow decided that his previous strategy of growing the business through bootstrapping it no longer made sense. “We needed to scale and grow the business,” he said in an interview.