A PRI gateway, also known as a Primary Rate Interface gateway, is a device that acts as a bridge between traditional telephone lines and IP-based telephony systems. It allows businesses to connect their existing PRI lines, commonly used for voice communication, to their modern IP telephony infrastructure. The PRI Gateway enables seamless integration between the two systems by converting the PRI signals into IP packets. This integration brings numerous advantages, including cost savings, scalability, and flexibility in managing voice communication.