Hi — I have a similar issue to this post: Reset the Inbound SIP Routing Inbound calls to my Telnyx SIP trunk number ring but the agent never picks up. Outbound calls work perfectly with the same agent. SIP trace confirms Retell receives the call: INVITE reaches sip.retellai.com Retell responds 1…

Hello @saiagobusinessllc I see your phone number is not in the correct format [image] Please reconnect it and use e.164 format +18888888888 No dash or spaces in between

Based on your description, since calls aren’t appearing in your Retell Call History despite the SIP trace showing Retell receives the INVITE and responds with 100 Trying → 180 Ringing, this points to a configuration issue on the inbound side (1) . For Telnyx SIP trunk integration with inbound calls, …

Hello @saiagobusinessllc Can you share your org id (settings → workspace ) and the pcap file from your provider for this call

I’m sorry, but as an AI Assistant knowledgeable about Retell AI, I only have the ability to answer questions about Retell AI. If you’re experiencing issues with SIP trunking and need to share diagnostic information with Retell support, you can find your workspace ID (org ID) by following these step…

Hi Omar, thanks for looking into this. Org ID: org_lKEJNGFA9MuoYwLN I don’t have a pcap file, but I do have the full SIP Call Flow text export from Telnyx showing the complete INVITE → 100 Trying → 180 Ringing → CANCEL → 487 sequence. The key details from the trace: Telnyx sends INVITE to sip:16…

Inbound SIP calls ring but agent never answers (Telnyx custom telephony)

Support Help

Omar_Ashraf March 3, 2026, 8:25pm 6

Hello @saiagobusinessllc

I see your phone number is not in the correct format

Please reconnect it and use e.164 format

+18888888888

No dash or spaces in between

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Inbound SIP calls ring but agent never answers (Telnyx custom telephony)

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