fair-rose•4w ago

Telnyx SIP Inbound Settings: Translate Number

I've been followingL https://docs.vapi.ai/advanced/sip/telnyx. I've set up Outbound calling with Telnyx however I cannot finish setting up Inbound calling for my Telnyx number. Happy to jump on a call to resolve this one. When trying to follow these instructions:

Configure SIP invite
Go to Numbers, edit the number you’ll be using
Navigate to Voice settings
Scroll down to find “Translated Number”
Set this value to match your Vapi SIP URI
You can get your Vapi SIP URI when you create a new SIP number through the Phone Numbers tab in the Vapi dashboard. The URI will look like:

sip:<your-unique-id>@sip.vapi.ai
This setting modifies the SIP Invite so invites are correctly routed to your Vapi SIP URI.

Configure SIP invite
Go to Numbers, edit the number you’ll be using
Navigate to Voice settings
Scroll down to find “Translated Number”
Set this value to match your Vapi SIP URI
You can get your Vapi SIP URI when you create a new SIP number through the Phone Numbers tab in the Vapi dashboard. The URI will look like:

sip:<your-unique-id>@sip.vapi.ai
This setting modifies the SIP Invite so invites are correctly routed to your Vapi SIP URI.

I have attached a screenshot of the Telnyx UI, showing that a number is required. I cannot put any characters or symbols in there because of the form validation preventing me. I have also tried via API with the same issue:

Response: {"errors":[{"code":"10015","title":"Bad Request","detail":"Must contain only letters and numbers; no spacing allowed","source":{"pointer":"/translated_number"},"meta":{"url":"https://developers.telnyx.com/docs/overview/errors/10015"}}]}

Response: {"errors":[{"code":"10015","title":"Bad Request","detail":"Must contain only letters and numbers; no spacing allowed","source":{"pointer":"/translated_number"},"meta":{"url":"https://developers.telnyx.com/docs/overview/errors/10015"}}]}

15 Replies

Vapi Support Bot•4w ago

It appears that Telnyx's "Translated Number" field currently only accepts alphanumeric input, which prevents entering the required SIP URI (sip:<your-unique-id>@sip.vapi.ai) as described in the Vapi documentation.
The best next step is to contact Telnyx support and reference error code 10015, asking if there is an alternative way to route SIP invites to your Vapi SIP URI or if a different field should be used for SIP trunking with Vapi.
In the meantime, double-check if there is a "SIP URI" or "Forwarding" field elsewhere in the Telnyx portal that allows full SIP addresses, as some platforms separate these from the "Translated Number" field.
If you receive updated guidance from Telnyx, please share it here for others facing the same issue. Source: - Telnyx SIP Integration Guide – Vapi Documentation

⤵️ Mention @Vapi Support Bot for follow-ups 🐥

fair-roseOP•4w ago

i've found a few threads with the same issue that have been resolved on a call. Unofrtunately, no solution on the threads itself though

Sahil•4w ago

Hey! To help track down this issue, could you share: - The call ID -
This would really help us figure out what went wrong!

fair-roseOP•4w ago

Sorry, there is no callId that is relevant because it doesn't reach vapi, this is a setup issue

flat-fuchsia•4w ago

Hi. I'm having the same issue. When you know the solution or me post here pls

Sahil•3w ago

Please can you share a loom video, so to assist you easily ..

flat-fuchsia•3w ago

When is possible to do a call to solve this?

Sahil•3w ago

Checking if this is resolved/solved for you?

flat-fuchsia•2w ago

not yet

Sahil•2w ago

When configuring the SIP trunk in Vapi, please try and enable SIP register box, which will have the username that will be used for the URI in alphanumeric characters. Let us know if you need help configuring this

flat-fuchsia•2w ago

You are saying to do this when creating firstly the SIP Trunk in Vapi right? It doesn't let me create..

flat-fuchsia•2w ago

https://vapi.ai/community/m/1375113468457386114 Maybe the problem is connected with this?

BYO SIP Trunk - VAPI

We want to use own SIP trunk.
We have domain and credentials for authentication from our provider, but we have problem with settings. Our provider says, vapi does not send registration packet. WE have 3hours meeting with the provider where we tried every possible setting on vapi side or provider side

Sahil•6d ago

In the domain, make sure you follow this guide if you are creating a SIP trunk for Telnyx: Use this template as a guide to configuring both inbound and outbound gateways. The inbound gateway will need a static IP address and the outbound gateway will use the resolved domain name using UDP protocol:

{
  "provider": "byo-sip-trunk",
  "name": "My SIP Trunk",
  "gateways": [
    {
      "ip": "sip.provider.com",
      "port": 5060,
      "outboundEnabled": true,
      "inboundEnabled": false,
      "outboundProtocol": "udp"
    },
    {
      "ip": "203.0.113.10",
      "port": 5060,
      "outboundEnabled": false,
      "inboundEnabled": true
    }
  ]
}

{
  "provider": "byo-sip-trunk",
  "name": "My SIP Trunk",
  "gateways": [
    {
      "ip": "sip.provider.com",
      "port": 5060,
      "outboundEnabled": true,
      "inboundEnabled": false,
      "outboundProtocol": "udp"
    },
    {
      "ip": "203.0.113.10",
      "port": 5060,
      "outboundEnabled": false,
      "inboundEnabled": true
    }
  ]
}

Once you have configured the SIP trunk, you will receive a value for credentialId. Save that and use it for the next step of assigning the SIP trunk to a phone number, as that is a required value for setting up the phone number. If you encounter any issues with the setup, please feel free to reach out.

flat-fuchsia•3d ago

I have tried didn't worked... :/ It is to follow the same steps until step 4 (https://docs.vapi.ai/advanced/sip/telnyx#add-your-telnyx-sip-credentials-to-vapi) where I've put the text code above?

Telnyx SIP integration | Vapi

How to integrate SIP Telnyx to Vapi

Sahil•22h ago

We are currently testing the telnyx phone import with our own account. Once we resolve it, we will provide an update to you on how to connect it

Telnyx SIP Inbound Settings: Translate Number

Did you find this page helpful?