2.2 Programming16 Programming GuideVoice CODEC SettingsGatekeeper SettingsParameter & Description Default Value Range* Voice CODEC Priority 1st–4thSpecifies the type of CODEC for voice communications.Choose the appropriate CODEC for the network environment(e.g., bandwidth, CODEC conditions of the remote terminal).When using multiple CODECs, set them in an appropriatepriority order.Prior to establishing a call, a negotiation takes place over thenetwork and the CODEC to be used will be decideddepending on the setting of this parameter.For details about relations between bandwidth and CODEC,refer to "Detailed Explanations" in "2.2.3 VoiceCommunication Parameters".NoteWhen the Fast Connect feature (see under "Others"below) is disabled, the communicating cards must havethe same first priority CODEC set.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 secondary gatekeeperas 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 secondary gatekeeper.Set this parameter when setting up a secondary gatekeeperas a redundant backup system.1719 1 to 65535