3Com® VCX V7111 VoIP Gateway User Guide 163Parameter DescriptionTelnet SettingsEmbedded Telnet Server[TelnetServerEnable]Enables or disables the embedded Telnet server. Telnet is disabled bydefault for security reasons.Disable [0] (default).Enable (Unsecured) [1].Enable Secured (SSL) [2] = N/A.Telnet Server TCP Port[TelnetServerPort]Defines the port number for the embedded Telnet server.The valid range = valid port numbers. The default port is 23.Telnet Server Idle Timeout[TelnetServerIdleDisconnect]Sets the timeout for disconnection of an idle Telnet session (in minutes).When set to zero, idle sessions are not disconnected.The valid range is any value. The default value is 0.STUN SettingsEnable STUN[EnableSTUN]Disable [0] = STUN protocol is disabled (default).Enable [1] = STUN protocol is enabled.When enabled, the gateway functions as a STUN client andcommunicates with a STUN server located in the open internet. STUN isused to discover whether the gateway is located behind a NAT and thetype of that NAT. In addition, it is used to determine the IP addresses andport numbers that the NAT assigns to outgoing signaling messages (usingSIP) and media streams (using RTP, RTCP and T.38). STUN works withmany existing NAT types, and does not require any special behavior fromthem.This parameter cannot be changed on-the-fly and requires a gatewayreset.For detailed information on STUN, see STUN.STUN Server Primary IP[STUNServerPrimaryIP]Defines the IP address of the primary STUN server.The valid range is the legal IP addresses. The default value is 0.0.0.0.Instead of using this parameter, you can define the STUNserver's domain name (using the ini file parameterStunServerDomainName).STUN Server Secondary IP[STUNServerSecondaryIP]Defines the IP address of the secondary STUN server.The valid range is the legal IP addresses. The default value is 0.0.0.0.NFS SettingsNFS Table For detailed information on configuring the NFS table, see Configuring theNFS Settings.Configuring the NFS SettingsNetwork File System (NFS) enables the V7111 to access a remote servers shared files anddirectories and to handle them as if they are located locally. A file system, the NFS isindependent of machine types, OSs, and network architectures. Up to five different NFS filesystems can be configured.NFS is utilized by the V7111 to load the cmp, ini and configuration files using the AutomaticUpdate mechanism (see Automatic Update Mechanism).
