The basic function For GSM Payphone as below ; 1.Single display with call meter 2.850 / 900 /1800 /1900 mhz frequency 3.Use with solar panel or external recharge 3 days battery 4.Network management 5.Lock keyboard 6.Call records - 170 incoming calls and 20 missed calls 7.Add prefixal code automatically 8.Locking telephone, locking sim card, locking service provider and locking district 9.Handfree - needn't lift the handset 10.Receive or send short message
GSM alarm and security system, gate opener, GSM remote control, monitoring and alarm system, GSM intercom and access control, GSM modem and phone, payphone.
