GSM public pay phone is approved for use on the 900MHz EGSM and 1800 MHz GSM wireless communication networks.Ø It’s in imitation of the operation profiles of the corded hones.Ø It has caller ID function.Ø There will be internal battery for the backup electrical resource in case of power failed, standby for a long time; the battery has multi protection, it can raise the working efficiency, making the life of the machine longer.Ø The payphone’s apperance is degant and sturdy, the installment is convenient, easy operation, it’s suitable for rough environments and outdoor.Ø You are able to choose an external antenna with high magnitude ratio. The signal is stronger than the mobile phone’s.Ø It has double function to keep the machine working,, it can recover automatically if the controller or wireless modular groups can not work under any condition.Ø The terminal has the safety function of locking sets、cards、data and so on.Ø It can give an alarm for the multi malfunction, and the relative information will be sent to PMS in time.Ø The payphone provides the IC card slot, supporting the cash IC card highly protected with security measures.Ø It can be extra installed the solar energy board