3Com VCX V7111 VoIP SIP Gateways User Manual 71Channel ParametersIn Table 18, parameters that are shown in brackets refer to the format in theEmbedded Web Server *.Table 18 Channel ParametersINI File Field NameGUI Parameter Name*Valid Range and DescriptionDJBufMinDelay(Dynamic Jitter Buffer Minimum Delay)0 – 150 ms (default = 70)Dynamic Jitter Buffer Minimum Delay (described in the3Com VoIPLib Reference Library User Manual).DJBufOptFactor(Dynamic Jitter Buffer Optimization Factor)0 – 12 (default = 7)Dynamic jitter buffer frame error/delay optimization.BaseUDPPort(RTP Base UDP Port)Range 6000 –64000 (default 6000)Lower boundary of UDP ports to be used by the Gatewayfor RTP, RTCP and T.38 channels.The upper boundary is the BaseUDPPort + 10*(number ofGateway’s channels). For details see “Appendix A:BootP/TFTP Configuration Utility” on page 137.ECHybridLoss 0 = 6 dB (default)1 = 9 dB2 = 0 dB3 = 3 dBSets the four wire to two wire worst case hybrid loss, theratio between the signal level sent to the hybrid and theecho level returning from the hybrid.FaxModemBypassM(Fax Modem Bypass Packing Factor)Number of 20 ms payloads to be used for generating oneRTP fax/modem bypass packet. (Range 1–2, default = 1)FaxModemRelayVolume -18 to -3, corresponding to -18 dBm to -3 dBm in 1 dBsteps. (Default = -12 dBm) Fax gain control.FaxRelayECMEnable(Fax Relay ECM Enabled)0 = Disable using ECM mode during Fax Relay1 = Enable using ECM mode during Fax Relay. (default)
