> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://telidesk.crisp.help/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Can I use my existing VoIP phones?

Our currently supported VoIP phone is Polycom VVX400. If you have a different model, please talk to a business consultant. We may have to charge you an extra programming fee.

|| [Sales Questions](https://www.telidesk.com/contact)
|| [Support Contact](https://www.telidesk.com/support)
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