Upgrade from your current device and start using the AT&T ATTL88002 DECT 6.0 2 Line Handset for Tl88102. It s designed to allow users to expand their phone system with additional lines. This accessory handset is ideal for use at home or in an office. It has a small lightweight design that makes it easy to carry from one room to the next. This unit features an intercom that lets you make conference calls between phone lines and sets. It also doesn t require much space in order to set it up.