4 line Wireless Terminal 1)lock card,lock terminal 2)support polar-reverse,12 or ... support GPRS 4 line Wireless Terminal Unique Functions1,GSM cellular network outgoing.2,GSM cellular network incoming.3,DTMF ... Caller ID.4,Support secondary dial.5,Lock card, lock terminal ... loss: ≤0.5dB 4 line Wireless Terminal/Fixed wireless terminal