The AT & T Small Business System expandable up to the telephone system 16 of expansion. 1070 telephone hearing aid compatible and can connect up to four incoming telephone lines. The phone has a speakerphone for handsfree and headset jack compatible with most two-band 2.5mm headset. There are two additional ports to your phone are produced on another device, such as fax or modem. 1070 allows paging, intercom and call transfers between system phones and the possibility of connecting three parties in the same conference call. This phone also has a 32-number one-and two-touch memory speed dialing and directory containing up to 200 additional numbers can save by name.