Viking Electronics K 1900 8 Vandal Resistant Hot Line Panel Phone Diesel Tripp Lite U024 006 USB gold 14033 Tripp Lite U024 006 USB gold extension cable is manufactured using USB 2 432 Mm Centerpoint Rimfire Airgun Scope Auto dial 1 (up to 32 digits) programmable speed dial number Multi number dialer mode adds 5 (up to 16 digits) speed dial numbers Touch tone or pulse dialing Non volatile memory (no batteries required) Operates on analog PABX and key system extentions or analog Centrex and C lines Programmable 6 digit security code Touch tone programmable Vandal resistant Programmable pre dial pause Blocks fraudulent calls from hand held pocket dialers Limited toll restriction Hearing aid compatible amplified handset with sealed push button volume control