Viking economical and vandal resistant hot line phone Programmable 1 32 digit telephone number each time the phone's handset is lifted Products may be programmed to touch tone or pulse dial and will not dial on incoming calls Available in desk or wall chassis, as well as in a vandal resistant panel phone configuration Network insert dialer also available to convert standard phones into hot line phones Telephone line powered Hearing aid compatible amplified handsets Rotar handset volume control 1 32 digit speed dial number Touch tone and 10/20 pps pulse dialing Non volatile E2 memory no batteries required Restricts fraudulent calls from hand held dialers K 1900D/W 2 available in red or ash Optional Q170600 ringer Fax Back doc 845 Operates on a CO line or analog PABX/KSU extensions Ring detection will not dial on incoming calls Programmable security code to enter programming mode Touch tone programmable K 1900 6 fits standard 500, 554, 2500 and 2554