The telephone number of the phone sold is: AFT-BG-21, applicable to schools, subways, airports, access control intercom, elevators, prisons, and other places, this phone can be set up limited time call use, limited duration of 3 minutes

Support RJ11/RJ45 two kinds of wiring mode Evert Communication Technology Co., Ltd. is mainly committed to Metro, Highway tunnels, petrochemical, metallurgical nuclear power, marine shipbuilding, bridge mining and other industries internal emergency special communication system Paga broadcast dispatching, scenic spots, airport visitor help management system, municipal SOS, 110,119 alarm System