... supports hot plug and play, easier to maintain equipment, upgrade; built-in LCD panel, convenient user configuration, operation;2 ... reliability;9. Support analog service telephone call or digital IP telephone call, more convenient communication between sites;10. ... 8 inch)*1Auxiliary data interface19.2kbit/s, RS232C, RJ45Software upgrade interface115.2kbit/s, RS232C, RJ45Management interface100Mbit/s, 10 ...