The starting point of your Panasonic telephone system, all lines and telephones connect to a control unit. Panasonic 824 Analog Control UnitThe KX-TA824 is an Advanced Hybrid PBX System. It's initially configured with 3 CO lines and 8 Stations and will grow to 8 CO lines by 24 stations with the addition of add-on cards. The major feature highlights of the KX-TA624 include: Voice Mail Integration Caller ID* & Call Waiting Caller ID 4 Door Phones/Openers* Ring Groups Message Waiting Expandable to 8 lines and 24 phones ( in the same cabinet) Call Forwarding (Busy, No Answer, Follow Me, Outside Line and All Calls) Built-in Direct Inward System Access Auto attendant Built-in Remote Programming Modem Built-In Caller ID for first 3 lines! KXTA824$479.00 KXTA824 Caller ID Adapter CardAllows caller ID information to appear on the display of the proprietary 7000 series telephones. 1 Card required for every 3 caller ID compatible CO lines installed. Maximum of two per system. Caller ID service must be provided by the local telephone company. For use with the KXTA824 Control Unit KX-TA82493$119.95 KXTA824 3-Line 8-Phone Expansion CardFor KXTA824, provides connection for an additional 3 Lines and eight telephones. One per system. KX-TA82483$299.95 KXTA824 2-Line 8-Phone Expansion CardExpands the KXTA624 by 8 more phones. Can be installed in either of the two expansion slots in the KX-TA624. NOTE: This is the SECOND expansion card that is added to the KXTA624. The KXTA62477 must be installed first. KX-TA82481$279.95 KXTA824 Disa OGM/Auto Attendant CardInstallation of this card expands the Direct Inward System Access (automated attendant) from one to two simultenous conversations and from 3 minuts to 6 minutes. One max per KXTA824 system. KX-TA62491$209.95 KXTA824 Voice Mail 2-Port, 60-MinuteAdds "in-skin" voice mail to the KXTA824 with 2-Ports and 60-minutes of recording time. KX-TA82492$289.95 Doorphone/Opener CardConnects up to 4 door intercoms (KX-T30865) and provides 4 contact colosures. Allows connection of a regular doorbell that will ring simultaneously with the telephones when the door intercom speaker button is pressed. One max per KXTA824 system. KX-TA82461$110.95 Panasonic Door Intercom Speaker for all Panasonic Systems Mounts on an outside wall near a door to provide two-way handsfree intercom. Has a pushbutton to ring the telephones connected to your Panasonic system. KXT30865$35.95Color: WhiteBlack The Phone Doctor 800.515.9918 - 305.759.2000 Fax: 305.751.6089