Panasonic KX-TA82491 DISA/Auto Attendant Card:

The main unit has built in DISA(Direct Inward System Access) that supports one audio channel and 180 seconds of message record time. The KX-TA82491 adds a second audio channel and an additional 180 seconds for a maximum total of 2 audio channels and 360 seconds. A maximum of 1 KX-TA82491 can be installed in the system.