Hot-Line Dialer, Pulse. Viking's K-1900-4 Hot-Line dialer will store and automatically dial a pre-programmed, 16 digit number when ever the associated telephone goes off hook. The K-1900-4 uses non-volatile E2 memory, is telephone line powered and will operate on any PABX, Centrex, or standard loop start central office line with any conventional phone. The K-1900-4 is easily programmed while connected to an analog telephone line, using any Touch Tone phone. Note: For Touch Tone applications use the K-1900-5 Applications Security and emergency phones Interactive point of sale displays Interactive voice response systems Catalog sales Automated Teller Machines (ATM's) Replace leased ring down circuits Hot-Line reservation phones for hotels, airlines, car rentals, etc. Can be operated from a contact closure (see Contact Closure Application Note ) Features Remotely programmable using a standard Touch Tone phone Telephone line powered Non-volatile E2 memory (no batteries required) Won't dial on inbound calls Programmable 4 second pauses Touch Tone blocking feature helps to eliminate fraudulent calls Programmable dialing speed (10 pps/20 pps) One year warranty Made in the USA.