---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/21454#article
headline: "21454: Invalid CallDelay"
url: https://www.twilio.com/docs/api/errors/21454
inLanguage: en
dateModified: 2026-03-11T20:01:16.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 21454: Invalid CallDelay

Log Level: ERROR

## Description

Call delay specified must be an integer between 0 and 60, specifying the number of seconds to delay before initiating the validation call.

### Possible causes

* Make sure to enter an integer between 0 and 60.