The 1070 telephone is hearing-aid compatible and can be connected to up to four incoming telephone lines. This telephone features a speakerphone for handsfree use and a headset jack compatible with most two-band 2.5mm headsets (sold separately). There are two additional ports available for connecting the telephone to another device such as a fax machine or modem.-The 1070 allows paging, intercom and call transfers between system telephones and is capable of connecting three parties in the same conference call.-This telephone also features a 32-number one-and two-touch memory for faster dialing and has a directory which can store up to 200 additional numbers with names.-This telephone has a caller ID feature which supports caller ID with call waiting service. (Caller ID services are subscriber services available from many local telephone companies for a fee). -If there is a 1080 telephone in your system that is an auto attendant, it may record messages for your set. -The 1070 telephone is compatible with Centrex service