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Language file postfix allows the language file to have different postfixes so the phone can request a particular file. It will append an underscore "_" plus the string in the language file postfix. The default language file name is "gxp.lpf". If the field “Language File postfix “has "NL" string in it, then the phone will request "gxp_NL.lpf" instead of "gxp.lpf." User can only load one secondary language. Supported Secondary language: Czech, Dutch, Estonian, French, German, Italian, Polish, Portuguese, Slovak, Slovenian and Spanish. How to set up Secondary Language: Note: This is similar to updating firmware in your local network environment. Please refer to for details. 1. Download the language package from 2. Unzip the language package 3. Open the desired language zip file 4. Copy gxp.lpf to the firmware server directory using your local TFTP or HTTP server. 5. Access the advanced settings of the Web GUI, set “Display Language” to “Secondary Language” 6. Update and reboot the phone GXP has up to six line appearances, each with an independent SIP account. Each SIP account requires its own configuration page. Their configurations are identical. Table 16: SIP Account Settings Account Active This field indicates whether the account is active. The default value for the primary account (Account 1) is Yes. The default value for the other two accounts is No. Account Name The name associated with each account - displayed on LCD. SIP Server SIP Server’s IP address or Domain name provided by VoIP service provider. Outbound Proxy IP address or Domain name of Outbound Proxy, Media Gateway, or Session Border Controller. Used for firewall or NAT penetration in different network environment. If the system detects symmetric NAT, STUN will not work. ONLY outbound proxy can provide solution for symmetric NAT. SIP User ID User account information provided by VoIP service provider (ITSP); either an actual phone number or formatted like one. Authenticate ID SIP service subscriber’s Authenticate ID used for authentication. It can be identical to or different from SIP User ID. Authenticate Password SIP service subscriber’s account password for GXP to register to (SIP) servers of ITSP. Name SIP service subscriber’s name that is used for Caller ID display. Use DNS SRV: Default is No. If set to “Yes”, the client will use DNS SRV to look up server. User ID is Phone Number If the phone has an assigned PSTN telephone number, this field should be set to “Yes”. Otherwise, set it to “No”. If “Yes” is set, a “user=phone” parameter will be attached to the “From” header in SIP request SIP Registration This parameter controls sending REGISTER messages to the proxy server. The default setting is “Yes”. Un-register on Reboot Default is “No”. If set to “Yes”, the SIP user’s registration information will be cleared from the server when the phone reboots. SIP Instance ID Default is set “No.” If set to Yes it will be enabled and will add reg-ID and Instance ID on contact header in the REGISTER messages. This feature is mainly provided for servers that don't support SIP Instance ID feature, but will still allow phones to register. Register Expiration This parameter allows user to specify the time frequency (in minutes) that GXP refreshes its registration with the specified registrar. The default interval is 60 minutes. The maximum interval is 65,535 minutes (about 45 days). Local SIP Port This parameter defines the local SIP port used to listen and transmit. The default value for Account 1 is 5060. It is 5062, 5064, 5066 for Account 2, Account 3 and Account 4 respectively. SIP Registration Failure Retry Wait Time Retry registration if the process failed. Default is 20 seconds. SIP T1 Timeout RFC 3261 SIP T1 timer. Default is 1 second. SIP T2 Interval RFC 3261 SIP T2 timer. Default is 0.5 seconds. SIP Transport Choose SIP Transport between UDP and TCP. Default is UDP. Use RFC3581 Symmetric Routing Default No. When selected the phone will follow the routing procedures specified in RFC3581. NAT Traversal (STUN) This parameter activates the NAT traversal mechanism. If activated (by choosing “Yes”) and a STUN server is also specified, the phone performs according to the STUN client specification. Using this mode, the embedded STUN client detects if and what type of NAT/Firewall configuration is used. If the detected NAT is a Full Cone, Restricted Cone, or a Port-Restricted Cone, the phone will use its mapped public IP address and port in all of its SIP and SDP messages. If the NAT Traversal field is set to “Yes” with no specified STUN server, the GXP will periodically (every 20 seconds or so) send a blank UDP packet (with no payload data) to the SIP server to keep the “hole” on the NAT open. SUBSCRIBE for MWI: Default is No. When set to “Yes” a SUBSCRIBE for Message Waiting Indication will be sent periodically. SUBSCRIBE for Registration Event Default is No. This is ...

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