https://community.sinch.com/t5/Elastic-SIP-Trunking/How-do-I-configure-X-headers-on-my-Sinch-Elastic-SIP-Trunk/ta-p/19722 <P><SPAN data-olk-copy-source="MessageBody">You can configure every Invite sent from your Sinch SIP Trunk to include a custom “X” header. These headers can be configured with almost any name and value. They are most often used in shared environments where they can be used to label traffic from specific customers. Whatever your use-case, they can be configured under the <STRONG>Inbound Call Settings</STRONG> of your Since Elastic SIP Trunk Build dashboard. &nbsp;Once you have set the name and value, every call towards your SIP Infrastructure from Sinch will now include a “x-“ followed by your configured header name and value.</SPAN></P> <P>&nbsp;</P> <P><SPAN data-olk-copy-source="MessageBody"><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="est-header.png" style="width: 915px;"><img src="https://community.sinch.com/t5/image/serverpage/image-id/7401i6F4F9CAC64A4261C/image-size/large?v=v2&amp;px=999" role="button" title="est-header.png" alt="est-header.png" /></span></SPAN></P> Tue, 07 Jul 2026 17:40:40 GMT Alex_Sberna 2026-07-07T17:40:40Z https://community.sinch.com/t5/Elastic-SIP-Trunking/How-do-I-configure-X-headers-on-my-Sinch-Elastic-SIP-Trunk/ta-p/19722 <P><SPAN data-olk-copy-source="MessageBody">You can configure every Invite sent from your Sinch SIP Trunk to include a custom “X” header. These headers can be configured with almost any name and value. They are most often used in shared environments where they can be used to label traffic from specific customers. Whatever your use-case, they can be configured under the <STRONG>Inbound Call Settings</STRONG> of your Since Elastic SIP Trunk Build dashboard. &nbsp;Once you have set the name and value, every call towards your SIP Infrastructure from Sinch will now include a “x-“ followed by your configured header name and value.</SPAN></P> <P>&nbsp;</P> <P><SPAN data-olk-copy-source="MessageBody"><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="est-header.png" style="width: 915px;"><img src="https://community.sinch.com/t5/image/serverpage/image-id/7401i6F4F9CAC64A4261C/image-size/large?v=v2&amp;px=999" role="button" title="est-header.png" alt="est-header.png" /></span></SPAN></P> Tue, 07 Jul 2026 17:40:40 GMT https://community.sinch.com/t5/Elastic-SIP-Trunking/How-do-I-configure-X-headers-on-my-Sinch-Elastic-SIP-Trunk/ta-p/19722 Alex_Sberna 2026-07-07T17:40:40Z