Overview

The Oracle® Enterprise Session Border Controller supports multiple active registrations for the same user. The softswitch makes decisions regarding the current location of the user and the handling of requests from devices that are not currently identified as the user location. When there are multiple NATs, the Oracle® Enterprise Session Border Controller is still required to let the softswitch be able to differentiate it.

The Oracle® Enterprise Session Border Controller’s SIP roaming ability supports the following features:

• Multiple active registrations from the same user can be cached, allowing subscribers to move from one active SIP device to another (at the same site or multiple sites) and still retain service at the last registering device. With the SIP roaming feature, one person, using multiple devices, can be contacted at all of the devices. These multiple devices (with their unique contact information) register to indicate that they are available for anyone that wants to contact that one person.
• The Oracle® Enterprise Session Border Controller can also inform network devices (such as softswitches) of private SIP device IPv4 addresses (endpoints) and the public firewall address of the user location.