- Compatible with theATT1040 and ATT1080 (not backwards compatible with other AT&T 4-line models) - Caller ID, call waiting caller ID - 200# Caller ID memory - New call/message indicator - Entry removal button - Large blue lighted display - Speakerphone - 1 to 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 4lines (battery not included) - Individual station paging (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 silver