I’m currently running inbound voice calls through Twilio Elastic SIP Trunking into a Retell agent. All of our customers are based in South Africa and are calling a South African Twilio number that is configured to our Retell agent. Right now our SIP setup is: Twilio Elastic SIP Trunk (US1) Origination SIP URI: sip:sip.retellai.com;transport=tcp Twilio routing region: United States (US1) Transport: TCP Symmetric RTP: enabled This setup is working correctly, but we’re consistently seeing ~2–3 seconds of latency before the agent starts speaking, which is noticeable for callers. We attempted switching Twilio routing to Ireland (IE1) to reduce geographic distance, but inbound calls fail unless US1 routing is used. That suggests Retell is currently only reachable via a US-based SIP ingress. Question: Do you offer (or plan to offer) a region-local SIP ingress and media edge for Europe (e.g., Ireland) or Africa that we can target from Twilio to reduce latency for Southern African callers? Specifically: Is there a region-specific SIP URI we should be using (e.g., something like sip:ie.sip.retellai.com;transport=tcp)? If so, what is the correct SIP URI and transport to use? Are there any required IP whitelisting, TLS/SRTP requirements, or trunk settings changes for a non-US SIP edge? Once available, would the correct Twilio configuration be: Switch Twilio routing region to IE1 Update the Origination SIP URI to the region-local Retell SIP endpoint Keep transport as TCP (or TLS if required)? Our goal is to minimize time-to-first-audio for inbound calls from Southern Africa. I would love to know what my options are and how I can go about this. Any help or recommendation would be thoroughly appreciated - thank you very much!

Yes, I can help with this. The ~2–3s delay is most likely caused by geographic latency + media/AI initialization since your calls are being routed to a US-based SIP edge while callers are in South Africa. To guide you properly, I need to confirm one thing: Are you using Retell’s default SIP endpoint, or do you have any region/edge options enabled in your Retell dashboard or plan (for example multi-region or edge routing)? Once I know that, I can tell you: Whether a region-local SIP URI is available for you What exact URI + transport to use And how to configure Twilio for lowest latency from Southern Africa.

@User can anyone still help answer my question? I would like to know if there would be an EU or Africa SIP Edge for retell? Not just US? Thank you!

Hello @.sundancekid. , unfortunately all our server are in the USA. if there any new update we will make an announcement for it.

Thank you very much for this info Omar!