# Phone Numbers (/phone_numbers)





## Adding a phone number to the system

Pre-requisite to have the numbers available here is to have your SIP trunk configured and connected to Envocal. <br />
We take care of that part on our client's behalf. For more information or test numbers you can contact us [hello@envocal.ai](mailto:hello@envocal.ai).

Using the button **Add phone number** you can simply make the number availabe for further assignment to an Agent.

<img alt="PhoneNumbers" src={__img0} placeholder="blur" />

<Callout title="Please Note">
  The phone number is assigned to an Agent within Agent's Telephony tab.
</Callout>

[Look at the simple steps that enable an Agent to answer calls](/agents/telephony#how-does-an-agent-start-answering-calls)

<img alt="PhoneNumbersEdit" src={__img1} placeholder="blur" />

Once a number is available, you can quickly make changes or delete it if needed.