... high performance, high reliability. QPSK/16QAM modem, the data stream is processed by the energy diffusion random processing, ... and reliability;9. Support analog service telephone call or digital IP telephone call, more convenient communication between sites;10. ... business and managementService phone3.5mm(1/8 inch)*1Auxiliary data interface19.2kbit/s, RS232C, RJ45Software upgrade interface115.2kbit/s ...