A business Phone Systems in Florida is a multiline phone system that often has features like unlimited calling, automated menus, ring groups to call multiple employees at once, voicemail-to-email functionality, and call recording. Voice over Internet Protocol (VoIP), private branch exchange (PBX), and the key system unit are all types of business phone systems (KSU). The best phone systems for small businesses use VoIP technology, which lets you use your business's internet connection for the whole system.