3.4.4 Secondary DNS......................................................................................................27
3.5 Call Setting.......................................................................................................................28
3.5.1 H.323 Terminal Setting..........................................................................................28
3.5.1.1 Direct Connection.......................................................................................28
3.5.1.2 Gatekeeper..................................................................................................29
3.5.1.3 Advance Setting of the H.323.....................................................................31
3.5.2 SIP Phone...............................................................................................................33
3.5.2.1 Setting Mode...............................................................................................33
3.5.2.2 Single Server Mode.....................................................................................34
3.5.2.3 Setting by Line (Valid for the GoIP_4 and GoIP_8)...................................36
3.5.2.4 Trunk Gateway Mode..................................................................................39
3.5.3 SIP Advance Setting...............................................................................................40
3.5.4 Media Advance Setting..........................................................................................42
3.5.5 Voice Coding and Sequence...................................................................................43
3.5.6 Firewall Penetration...............................................................................................43
3.5.6.1 Traversal of H323 Signaling over NAT......................................................43
3.5.6.2 Traversal of SIP Signaling over NAT..........................................................45
3.5.6.3 Media NAT Traversal..................................................................................46
3.5.7 Dialing Rule...........................................................................................................47
3.5.7.1 Format of Dialing Rules..............................................................................47
3.5.7.2 Dialing Rule with Specified Length of Numbers........................................48
3.6 Volume Adjustment...........................................................................................................49
3.7 Call Forwarding (Setting on the Call Route and Authentication Mode)...........................50
3.7.1 Call Route Setting..................................................................................................50
3.7.2 Authentication Mode Setting.................................................................................50
3.7.2.1 Password Authentication.............................................................................51
3.7.2.2Trust List Authentication.............................................................................51
3.7.2.3 Password or Trust List Authentication........................................................52
3.8 Call Duration Limit...........................................................................................................52
3.9 SMS Mode........................................................................................................................54
3.9.1 SMS Dialing under SIP Protocol...........................................................................54
3.9.2 SMS Dialing under the H.323 Protocol.................................................................59
3.9.3 SMS Forwarding....................................................................................................63
3.10 Transparent Transmission of PSTN Caller Numbers......................................................65
3.11 Save the change...............................................................................................................66
3.12 Abandon the change........................................................................................................67
3.13 Tool.................................................................................................................................67
3.13.1 Online Upgrading.................................................................................................67
3.13.2 Modification of Password....................................................................................68
3.13.3 Restore Factory Settings......................................................................................68
3.13.4 Reset.....................................................................................................................69
4 Parameters of Equipment........................................69
5 Factory Default Parameter Table.............................72