Cisco 7821 IP phone Black, Silver 2 lines

Cisco
Cisco 7821 IP phone Black, Silver 2 lines
Cisco 7821 IP phone Black, Silver 2 lines
Cisco 7821 IP phone Black, Silver 2 lines
Cisco 7821 IP phone Black, Silver 2 lines
Cisco 7821 IP phone Black, Silver 2 lines

A telecommunications network which allows computers and other electronic devices to exchange data. Common examples are local area networks (LANs) and virtual private networks (VPNs).