---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/80201#article
headline: "80201: No Available Voice Proxy"
url: https://www.twilio.com/docs/api/errors/80201
inLanguage: en
dateModified: 2026-06-08T12:04:59.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 80201: No Available Voice Proxy

Log Type: APPLICATION

Log Level: WARNING

## Description

This warning means your Proxy Service could not automatically assign a proxy number with voice capability to the Participant. It usually occurs when the Session `mode` includes voice, but the Service's phone number pool does not contain an available number that supports voice. If you do not set `mode`, this can also happen in countries where the same number cannot support both voice and SMS.

### Possible causes

* Your Service does not have any phone numbers in its pool with voice capability.
* The Session `mode` requires voice, such as `voice-only` or `voice-and-message`, but the available proxy numbers only support messaging.
* You did not set `mode`, and the Participant is in a country where combined voice and SMS capability is not available on the same number.
* The only voice-capable numbers in the pool are marked as reserved, so Proxy will not choose them automatically.

### Possible solutions

* Add one or more Twilio phone numbers with voice capability to the Proxy Service's phone number pool. Check the number's capabilities before you add it.
* Set the Session `mode` explicitly to match the communication you need. Use `voice-only` for calls, `message-only` for SMS, or `voice-and-message` only when your pool supports both channels.
* In countries where one number does not support both voice and SMS, add separate voice-capable and messaging-capable numbers to the pool so Proxy can assign the right number for each Session.
* If you need to use a reserved voice-capable number, create the Participant with `proxyIdentifier` or `proxyIdentifierSid` instead of relying on automatic selection.

#### Additional resources

* [Proxy Quickstart for SMS and Voice](/docs/proxy/quickstart)
* [Phone Number Management](/docs/proxy/understanding-phone-number-management)
* [Participant resource](/docs/proxy/api/participant)