4.1.1LED..................................................................................................................................................................................................... 36
4.1.2.IR LED...............................................................................................................................................................................................36
4.1.3.RFID Card Code Display Related.................................................................................................................................................37
4.1.4.Key Display Related........................................................................................................................................................................37
4.2.Intercom...................................................................................................................................................................................................... 38
4.2.1.Max Call Time.................................................................................................................................................................................. 38
4.2.2.AEC Level.........................................................................................................................................................................................38
4.2.3.Intercom............................................................................................................................................................................................ 38
4.2.4.Return Code When Refuse............................................................................................................................................................39
4.2.5.SIP Call Related.............................................................................................................................................................................. 39
4.2.6.Codec................................................................................................................................................................................................ 40
4.2.7.Subscribe.......................................................................................................................................................................................... 42
4.2.8.DTMF.................................................................................................................................................................................................42
4.2.9.Session Timer.................................................................................................................................................................................. 43
4.2.10.Encryption.......................................................................................................................................................................................43
4.2.11.NAT.................................................................................................................................................................................................. 43
4.2.12.User Agent......................................................................................................................................................................................44