Top features dect security keeps your conversation secure dedicated nuisance call block button stops telemarketers from bothering you do not disturb mode quiets all incoming calls for set periods of time advanced answering system always lets you know when there's a new message intercom for communicating with other handsets and transferring calls dect securitydect telephones encrypt their communication to the base unit, providing security for your conversations. The encryption for the panasonic kx tgd623eb cordless phone is updated periodically, so you can talk freely.dedicated nuisance call block buttonyou can block unwanted calls with ease using the dedicated button. When the phone is ringing or even mid call, you can press the call block button to add the caller to your blocked list to prevent them from bothering you again.do not disturb modeeach handset can be individually programmed to not ring at specific times, so you're not woken up in the middle of the night. You can allow particular numbers to still ring when calling during do not disturb, so in an emergency you can still be reached.advanced answering systemwhether you're home or not, you can always know when a new answering machine message has arrived. The base unit will beep when it gets a new message, and it can send an alert to your mobile or office phone.intercominstead of running around the house shouting someone's name, you can use the panasonic kx tgd623eb's intercom system. This let's you ring other handsets to speak to other members of the household and transfer calls. It can also listen for noise and call your handset, so you can leave a handset in the baby's room to function as a baby monitor.