I have connected a Vapi assistant to a phone number on telnyx. When i test the assistant in Vapi it works fine but when I call the phone number the assistant speaks in slow motion, could this be something wrong the sip or some settings in Vapi?

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Try switching to a different voice provider in your Vapi assistant settings, as "robotic" or slow speech is often caused by codec mismatches or provider issues with SIP integrations. To do this: 1. Go to your assistant in the Vapi dashboard. 2. Change the voice provider (e.g., from ElevenLabs to another option). 3. Save and test the call again. This step helps isolate if the issue is related to the current voice provider or SIP codec compatibility. For more details, see the [Vapi debugging guide](https://docs.vapi.ai/debugging). Source: - [Debugging voice agents](https://docs.vapi.ai/debugging)

Please share the call ID, will check on my side for what's the case.

Hello here is a call id for an example: 019bf6be-44b0-7ee4-840c-0ca12086fc30

You are using OpenAI TTS, can you try with a different provider, reccomended elevenlabs or Cartesia provider? There's nothing wrong with the settings.