Fortinet is an American multinational corporation headquartered in Sunnyvale, California. It develops and markets cybersecurity software, appliances and services, such as firewalls, anti-virus, intrusion prevention and endpoint security, among others. It is the fourth-largest network security company by revenue.
Cisco Systems is the primary division of Cisco and is focused on enterprise class products. Cisco Unified Communications Solutions unify voice, video, data, and mobile applications on fixed and mobile networks, delivering a media-rich collaboration experience across business, government agency, and institutional workspaces.
Yealink is professional designer and manufacturer of IP phones and video phones for the world-wide broadband telephony market. Yealink products are fully compatible with the SIP industry standard, and have broad interoperability with the major IP-PBX, softswitch and IMS on the market today. High-quality, easy to use and affordable price-are what Yealink strive all the time to meet.