The four pieces of equipment that use modern technologies are an Internet modem, a Router, an internet switch, An Uninterruptable Power Supply (UPS)
Internet modem
The term "modem" is misleading because it dates back to the time when a digital signal was required to be modulated before being sent over an analog phone line and demodulated upon arrival.
However, every firm needs a link between an Internet Service Provider (ISP) and an office network.
Router
Every device on a network may receive a different IP address from a router. This is necessary for features like shared printing and scanning.
Anyone with the necessary credentials can connect securely to network devices from home or while on the go by setting up a virtual private network (VPN) on a router.
An Internet switch
Physical ports on routers are often few. Fortunately, a switch may be used to connect a router. Switches can have up to 48 ports. Stacking switches is another option. Therefore, each VoIP phone in your office that has, let's say, 24 lines will require a port (although a VoIP phone and a computer can be daisy-chained to a single switch port).
An Uninterruptable Power Supply (UPS)
A few hundred dollars to many thousands of dollars can be spent on a UPS, and companies like CyberPower provide a variety of products in this price range.
Low-end UPSs can run modems, routers, and switches for a few hours during a power outage because they consume little power. Employees with fully charged laptops can keep working.
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