When forwarding SIP messages from a trunking device to the SIP Server, certain headers may need to be transformed differently for proper interoperation. Define how specified SIP headers should be transformed when forwarding to the SIP Server. These settings are applied to all SIP trunking devices.
- Choose VoIP > SIP > ALG.
Scroll to Header Transformation.
Configure settings using the information in the following table as a guide.
Header Transformation Configuration Parameters
Item Description Header Transformation
Defines how specified SIP headers should be transformed when forwarding to the SIP Server. These settings are applied to all SIP trunking devices.
From Header Select the domain to use in From header when sending requests to the SIP Server:
• SIP Server address (default)—SIP endpoints that register typically use the SIP Server address.
• System WAN IP address—Endpoints that do not register (most trunking devices) set the domain to the systems IP address.
SIP endpoints that register typically set the domain in the From header to the SIP Server address. Endpoints that do not register (most trunking devices) set the domain to the system IP address. Check your SIP server configuration on the SIP Settings page to determine which setting is correct. Choose VoIP > SIP and refer to Configuring SIP Settings.
Click Commit to save your settings.
Proceed to Configure Dial Rules.
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