Xorcom

CompletePBX by Xorcom offers telephony solutions for businesses in various industries, including hospitality, education, healthcare, manufacturing, real estate, government, retail, finance and transport. This comprehensive open source VoIP phone system is great for companies from 30 users, to as many as 1,500. Great initiatives to avoid cybercrime are also an advantage. Spark is its product for small businesses with less than 30 users.