Topic List

Click a topic to learn more.


Term of the Moment

black box


Look Up Another Term


Redirected from: SBC phone

Definition: router phone


An IP phone that runs the session border controller (SBC), which encrypts traffic, reconnects calls if dropped, overcomes firewall issues and routes internal calls within the network. Without an SBC within at least one phone in the network, a call from one phone extension to another employee in the next room traverses the Internet to a datacenter and back again. If no router phones are used, an SBC can generally be installed in a computer in the network. See session border controller and IP phone.