4-Line Phone Basic- AT&T 4-Line basic expandable corded telephone- Compatible with the ATT1070 and ATT1080 (not backwards compatible withother AT&T 4-line models)- Speakerphone - 1to 4 line capability- Intercom between stations- Expandable up to 16 stations- Call transfer between stations- 32# Speed dial - 16 Intercom number locations (can be used for one-touch memory, two-touch memory, and direct station dialing)- 2 Data ports- Easy to install- 3 Party conferencing (inside or outside lines, or a combination)- Power failure protection for all 4 lines (battery not included)- Individual stationpaging (intercom) or system-wide paging- Headset jack (2.5mm)- 4-Line backlit LCD display-Redial/hold/mute/flash- Last 6 number redial- Volume control for receiver, speakerphone, headset, ringer- Do not disturb- Wall mountable (bracket included)- Auto line selection- Display dial- Rapid scroll navigation pad- New message indication- 4 Lighted line indicators- Auto redial- Memory loss protection- Selectable ringer tones- Hearing aid compatible-DSL Compatible (splitters/filter not included)- Every unit in the system must be assigned an extension number for the intercom feature to work-1 Year manufacturer's warranty - Dark silverATT1040