4 line CDMA Fixed Wireless Terminal 1)lock card,lock terminal 2)support polar-reverse,12 or ... 16 KHz pulse signal 3)support GPR 4 line ... network incoming.3,DTMF Caller ID.4,Support secondary dial.5,Lock card, lock terminal.6,Send polarity reversal signal ... 99.99%9,Insertion loss: ≤0.5dB 4 line CDMA Fixed Wireless Terminal/FWT (direct supplier)