Elastic SIP Trunking Release Notes 2026

Alex_Sberna — Tue, 13 Oct 2026 18:13:55 GMT

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10/13/2026 - New Analytics Page Enhancement

Sinch Elastic SIP Trunking now includes visibility into the average calls per second for each customer trunk. This new capability, available in the Elastic SIP Trunking Analytics page, will automatically average the calls-per-second which occurred during the configured date range. This feature will give customers improved insight into trunk performance and call activity, making it easier to monitor usage, review trends, and support troubleshooting.

9/15/2026 - Trunk-level CPS settings

Customers can now view and manage the configured Calls Per Second (CPS) setting on their Elastic SIP Trunks. In addition to seeing the account-level CPS limit, customers can now choose whether a trunk uses that account-level setting or assign a CPS value directly at the individual trunk level. This provides greater flexibility and visibility into call throughput configuration, while making it easier to understand how capacity is applied across trunks. Trunk-level CPS values must be positive integers, and values above the account-level limit will not take effect.

7/10/2026 - Identity Header pass-through

Sinch Elastic SIP Trunks may now enable their trunks to receive the STIR/SHAKEN Identity header. Sinch will continue to use the header to do STI-VS Verification, however instead of removing the header at the end of Verification, it will now be sent on to the customer's SIP Infrastructure. Additionally, once the Identity header has been enabled, you may also select to have us include a P-Attestation-Indicator and P-Origination-ID header which will just let you know what the call was attested with, and the origination ID of the sender.

6/12/2026 - Optional "X" headers

Sinch Elastic SIP Trunks may now include optional "X" headers placed into calls from their SIP trunk. Configure this under your trunks inbound call settings. Once done, all calls to your Sinch provided numbers will have that header and value placed into them.

6/10/2026 - Preferred locations

Sinch Elastic SIP Trunks may now select a preferred location that would like calls to be sent to them from. We use geo-DNS to select our routes if no preference is set on the endpoint.

5/27/2026 - Change to hunting SIP rejection codes

The Sinch Elastic SIP Trunking product hunts through endpoints in order of priority whenever the customer’s infrastructure rejects, or fails to respond to, a SIP Invite request. Currently, the platform hunts on most SIP rejection codes. Read more about the code hunting behavior here.

3/20/2026 - SIP REFER Support

Sinch Elastic SIP Trunking customers may now send SIP Refer messages from their endpoints after a call has been established. More information on how to use SIP Refer can be found here. https://community.sinch.com/t5/Elastic-SIP-Trunking/How-do-I-use-SIP-REFER/ta-p/19346

1/14/2026 - PIDF-LO Support

Sinch Elastic SIP Trunking customers may now send Presence Information Data Format – Location Object (PIDF-LO) information when making a call to 911 Emergency Services. This information is passed along to the 911 operator to provide more precise information as to the callers location.

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