Beyond Internet Access: Network Cables Can Carry Voice and Power

Wired network cables do more than deliver a reliable internet connection between devices. They can also carry voice traffic and, with compatible equipment, supply electrical power.

Voice calls are one example. Internet-based telephone systems use network connections to transmit conversations as digital data, allowing a wired connection to support both calls and other online services.

Compatible network cables can also carry electricity through a technology known as Power over Ethernet. This allows certain devices, such as internet phones, security cameras and wireless access points, to receive data and power through a single cable.

That capability is not available with every cable or device. It requires suitable equipment to supply and receive power, so users should check compatibility rather than assume any network connection can serve as a power source.

Network cables also support local connections between computers and other devices, enabling tasks such as sharing files or accessing a network printer. These uses show that a wired network can remain useful even when it is not carrying traffic to the wider internet.