Auto dial telephone KNZD-53

analogVoIPSIP

KNZD-53 Auto dial Telephone We are the manufacturer of Dust and water proof telephone anti-knocking mining telephone waterproof emergency telephone for fire alarm zone and jail . Product feature: 1. Shell: 304 stainless steel 2.Handset, buzzing, circuit boards, all the accessories adopt multi-layer waterproof, dustproof structure. 3.Have good stability, strong anti-jamming capability, accord with national standard GB/T 15279-94 certificate 4.IP55 protection grade. 5.Shell has completely isolated electrical grounding device and with the internal circuit, electromagnetic shielding effect. 6.Have excellent sound quality clear, loud noise, no echo 7.Handset: special engineering plastics, one-piece structure, good sealing,-35 degrees won’t burst. 8.Shape is lightness and beauty 9.Wire: use teflon wire, acid and alkali resistance, high and low temperature resistance, anti-aging, no fire. 10.Waterproof glue: adopt import waterproof glue, high viscosity, high temperature resistant, high pressure, waterproof minimum 5 years of life 11.Intelligent busy signal detection function,automatically hang up when received the disconnect signals Operation: Auto-dial function Pick/hang up way: handset control,picking to connect; hang up to disconnect; Answer calls: When call, telephone ring,lift the handset, you can talk with each other, hang back the handset after the call. Dial phone: lift the handset can be directly dialing the hotline have been set on switches or the number have been storaged