... processingVoice codec: G.711,G.729A,G.723.1,GSM,iLBC Echo cancellation: G.168 with 64ms echo ... , SNMPv2, Telnet, TFTP, SyslogAuxiliary MaintenanceInquiry and set by phone dialer, factory reset buttonProtocol and standardProtocol SIP (RFC3261 and ... and secondary SIP account, register by DNS, DNS SRVStandard Caller ID detection(FSK/DTMF), configurable call progress tone planHardware LEDStatus ...