> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://onlinesolutions.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).

# Default caller ID

Go to Company Number -> Advance Setting -> Caller ID usage allowance and allow users to use Company Number.

![](https://storage.crisp.chat/users/helpdesk/website/dc55cfd193a55800/1_dfcqx3.png)

Once is all set, open our PhoneSpeak Desktop Application ( Windows ) and log in with the credential.
Click on the Avatar on the right top corner.

![](https://storage.crisp.chat/users/helpdesk/website/dc55cfd193a55800/2_u2r5j2.png)

Choose the drop-down and select the default caller ID.


![](https://storage.crisp.chat/users/helpdesk/website/dc55cfd193a55800/3_pb8u8m.png)