2.2 ProgrammingProgramming Guide 15Voice CODEC SettingsGatekeeper SettingsParameter & Description Default Value Range* Voice CODEC Priority 1st–4thSpecifies the type of CODEC for voicecommunications.Choose the appropriate CODEC for the networkenvironment (e.g., bandwidth, CODEC conditions ofthe remote terminal). When using multiple CODECs,set them in an appropriate priority order.Prior to establishing a call, a negotiation takes placeover the network and the CODEC to be used will bedecided depending on the setting of this parameter.For details about relations between bandwidth andCODEC, refer to "Detailed Explanations" in "2.2.3Voice Communication Parameters".1st: G.729A2nd: No default3rd: No default4th: No defaultG.723.1,G.729A,G.711Mu,G.711AParameter & Description Default Value Range# GatekeeperSpecifies the use of a gatekeeper.For details, refer to "Detailed Explanations".Don’t use Use,Don’t use* Primary Gatekeeper IP AddressSpecifies the IP address of the primary gatekeeper.192.168.1.3 The following addressesare invalid:• Class D addresses• Class E addresses• Loopbackaddresses* Primary Gatekeeper Port No.Specifies the port number of the primary gatekeeper.1719 1 to 65535* Secondary Gatekeeper IP AddressSpecifies the IP address of the secondary gatekeeper.Set this parameter when setting up a secondarygatekeeper as a redundant backup system.192.168.1.4 The following addressesare invalid:• Class D addresses• Class E addresses• Loopbackaddresses* Secondary Gatekeeper Port No.Specifies the port number of the secondarygatekeeper.Set this parameter when setting up a secondarygatekeeper as a redundant backup system.1719 1 to 65535