BASIC NAME TELEPHONE TECHNOLOGY IP WIRED TYPE FUNCTIONS CALL ID/SPEAKER INSTALLATION DESK COLOR GRAY TELEPHONE ANSWERING WITHOUT ANSWERING ADDITIONAL REQUIREMENTS SEE OBS COMMERCIAL REFERENCE CISCO-IP PHONE 7821 OBS: – FULLY PROGRAMMABLE KEYS; – MULTIPLE CALLS FOR EACH DIRECTORY NUMBER; – KEYS PROVIDE ONE-TOUCH ACCESS TO SERVICES, MESSAGING, DIRECTORY, HOLD/RESUME, TRANSFER AND CONFERENCE FEATURES; – FULL-DUPLEX SPEAKER; – HAS A 3.5” (396X162) HIGH RESOLUTION GRAY SHADE DISPLAY.