Most dual-mode phones can handle both VOIP and PSTN calls, although some are strictly cellular/VOIP.

VOIP phones that are PSTN capable are a great way to ease into VOIP, especially if you’re going to be keeping a PSTN line for backup or your security system. Some phones switch between modes automatically, while others require you to push a button or switch—it all depends on the model you purchase.

DECT stands for Digital Enhanced Cordless Telecommunication

DECT is a European standard for cordless communication and data transfer. DECT phones are often dual-mode, able to switch between voipand the PSTN, for example. They also operate at 1.9 MHz, which Supports reduce performance lags on your home network due to interference. Although you don’t need one to use VOIP, DECT phones are specially designed to mesh with cellular and VOIP networks.