On-premise phone systems, or PBX systems, are housed within a business, offering control and customisation over telecommunications. They provide reliable voice service and easy integration with existing tech infrastructure. They are advantageous in scenarios where businesses have a high volume of calls, require advanced call routing features, or wish to keep their telecommunications system in-house for security or compliance reasons. Certain industries, where an always-on phone line is critical, also benefit from on-site systems.