Telecommunications have changed a lot in recent years. Telephone cables are increasingly being replaced by WLAN routers, powerline adapters and VoIP. WLAN routers provide fast wireless connections to devices such as smartphones, tablets and laptops. Powerline adapters use the power lines in the house to transmit the network signal, which can be especially helpful in older buildings. VoIP enables telephony over the internet and is a cost-effective alternative to traditional phone lines. These technologies make communication faster, easier and more flexible.