Panasonic KX-TES824 5+16 line PABX system machine has automatic fax transfer, automatic pause insertion, call forwarding, call hold / pick-up / transfer / waiting, conference call, data line security, flexible ringing assignment, hold reminder, intercom, the last number redial, power failure / transfer, programmable call restriction, pulse to tone conversation, system speed dialing 100 numbers, distinctive ringing, USB for PC programming,