The K-1900-7 panel phone will auto-dial a 1-32 digit programmable phone number each time the handset is lifted. The unit will Touch Tone or pulse dial and will not auto-dial on incoming calls. The K-1900-7 housing consists of a heavy gauge stainless steel panel, an armored cable, a heavy duty handset, and an all metal cradle. The K-1900-7 can be easily Touch Tone programmed at the shop or installation site. All programming is stored in non-volatile memory. Operates on analog PABX and key system extensions or analog Centrex and CO lines Programmable 6 digit security code Vandal-resistant Line-Powered