Session Border Controllers

<p>With the advent of VoIP came a host of network opportunities and challenges. One such challenge related to NAT (Network Address Translation) as the borders between networks, private and public or inter‐carrier were traversed. Various network devices and techniques evolved to solve these NAT traversal issues; one however, took the lead and now has become ubiquitous, offering a variety of functions &ndash; the Session Border Controller or SBC.</p>