XO Communications and Fonality announce that Fonality PBXtra and trixbox Pro phone systems have passed XO Communications' certification for standard interoperability with XO's SIP-based integrated voice and data communications solution.
XO Communications is a leading provider of business-class VoIP services and solutions, supporting more than 15,000 businesses and 500,000 customer employees. Fonality's IP-PBX phone systems are known for reliability, superior features, simplified deployment, and offering cost savings up to 80 percent off the price of competing solutions.