- Telephone line powered - Hearing aid compatible amplified handsets - Rotary handset volume control - 1 32-digit programmable 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 - Available in red or ash - Optional Q170600 ringer - Operates on a C.O. line or analog PABX/KSU extensions - Ring detection (will not dial on incoming calls) - Programmable security code to enter programming mode - Touch tone programmable VK-K-1900-6 fits standard 500 554 2500 and 2554 set phones
