What is Frame Relay?

Frame Relay is a packet-switching technology that transmits digital data over a network using virtual circuits. It was widely used in telecom and data communication before being replaced by modern technologies like MPLS and VoIP. Frame Relay works by breaking down data into smaller packets and transmitting them over a shared network. It uses permanent virtual circuits (PVCs) to establish a continuous connection between endpoints. While Frame Relay was popular for connecting branch offices and supporting WAN connectivity, it has become largely obsolete in modern IP-based communication environments. However, some older telecom infrastructures and legacy systems may still rely on Frame Relay for specific use cases. Businesses transitioning to VoIP often migrate away from Frame Relay to more efficient, scalable, and cost-effective IP-based solutions.