All carriers use, and have used for many years, the concept of a common IP core. The common IP core is what's at the root here. A common IP core is obviously designed for security purposes. It lets you manage, and essentially I would describe it as the brain of the network. It's not something that traditionally is regionalized. All operators use a common core and then use what are called “access networks” to feed into that. The access networks can be managed. In this case—
