4 line GSM Fixed Wireless Terminal 1)lock card,lock terminal 2)support polar-reverse,12 or 16 KHz pulse signal ... 3)support GPRS 4 line GSM Fixed Wireless Terminal Unique Functions1,GSM cellular network outgoing.2,GSM cellular network incoming.3,DTMF Caller ... ,DTMF Receive: > -23dB insure receiving.8,DTMF Receive sensitivity: 99.99%9,Insertion loss: ≤0.5dB 4 line GSM Fixed Wireless Terminal/FWT