The DECT standard is widely established for wireless communication between the base and the handsets. Standardisation and DECT-GAP allow devices from different manufacturers to be used with a base. Within Europe, DECT uses a frequency range between 1.88 and 1.90 gigahertz. Some other countries use different frequency ranges. Cordless phone may therefore only be operated in the certified countries. In addition to telephony, DECT can be used for additional functions. For example, text messages can be transmitted to a handset via DECT.
Although there are cordless phones on the market which use Wi-Fi, this standard has not been able to prevail over DECT. This is due to some system restrictions Wi-Fi technology has. In addition to a limited range compared to DECT, users of Wi-Fi phones may in some cases need to anticipate inadequate bandwidths due to parallel data transmission on the Wi-Fi network, since phones and other devices share the bandwidth. This can cause interruptions or even dropped connections.