Frequency Stratus is a revamped cloud-based hotel staff communication solution by Percipia. Frequency Stratus is Percipia’s industry-leading on-premise cloud-based hotel communication system. Just like the on-premise solution, Frequency Stratus, a hotel telephone cloud PBX, includes our most popular hospitality communication solutions: Parallax PMS integration engine and Precision guest voicemail system. Enhance your telephony experience by adding Informant Call Accounting Software and Frequency Operator Panel.