> ## Documentation Index
> Fetch the complete documentation index at: https://docs.wavix.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How to configure Zoiper using Wavix SIP trunks

> Learn how to connect Zoiper softphone to Wavix SIP trunks and start making and receiving calls.

## Prerequisites

Before you begin, ensure you have:

1. An active phone number on your Wavix account. If you need to purchase one, see our guide on [how to buy a phone number](/numbers/buy-number).
2. A SIP trunk ([How to create a SIP trunk](/sip-trunking/create-sip-trunk)).

## Configure Zoiper

<Steps>
  <Step title="Download and install Zoiper">
    Go to [zoiper.com](https://zoiper.com), download, and install the latest version.
  </Step>

  <Step title="Enter SIP trunk username and password">
    Enter your Wavix SIP trunk ID and password. Select **Login**.

    <img src="https://mintcdn.com/wavix/sPDk5EfEIf2pkDet/sip-trunking/guides/images/zoiper/zoiper-login.png?fit=max&auto=format&n=sPDk5EfEIf2pkDet&q=85&s=57c7fdc861d7dc4241dc3122e7ea7d39" alt="SIP username and password" title="Enter SIP username and password" style={{ width:"60%" }} className="mx-auto" width="1680" height="1160" data-path="sip-trunking/guides/images/zoiper/zoiper-login.png" />
  </Step>

  <Step title="Enter the host name">
    Enter the address of one of Wavix’s regional SIP proxies. Select **Next**.

    <img src="https://mintcdn.com/wavix/sPDk5EfEIf2pkDet/sip-trunking/guides/images/zoiper/zoiper-sip-gateway.png?fit=max&auto=format&n=sPDk5EfEIf2pkDet&q=85&s=15b1f1fbcd9d61ec970a24db817a5e0d" alt="Wavix SIP gateway" title="Enter SIP gateway" style={{ width:"60%" }} className="mx-auto" width="1680" height="1160" data-path="sip-trunking/guides/images/zoiper/zoiper-sip-gateway.png" />

    <Note>
      Choose the gateway with the lowest ping from your location. See [Wavix IP addresses](/sip-trunking/ip-allowlisting) for the full list of regional gateways.
    </Note>
  </Step>

  <Step title="Skip Authentication and Outbound proxy step">
    Wavix doesn't require an authentication username. Select **Skip**.

    <img src="https://mintcdn.com/wavix/sPDk5EfEIf2pkDet/sip-trunking/guides/images/zoiper/zoiper-auth-proxy.png?fit=max&auto=format&n=sPDk5EfEIf2pkDet&q=85&s=4a2a6d05ad48035ef44c6c768c7e64f5" alt="Zoiper Authentication and Outbound proxy" title="Skip Zoiper Authentication and Outbound proxy" style={{ width:"60%" }} className="mx-auto" width="1680" height="1160" data-path="sip-trunking/guides/images/zoiper/zoiper-auth-proxy.png" />
  </Step>

  <Step title="Wait for configuration test">
    Wait while Zoiper validates your configuration and tests the connection to Wavix. Select **Next**.

    <img src="https://mintcdn.com/wavix/sPDk5EfEIf2pkDet/sip-trunking/guides/images/zoiper/zoiper-config-test.png?fit=max&auto=format&n=sPDk5EfEIf2pkDet&q=85&s=439b16aa9ee2685f27a71d80d298538f" alt="Zoiper configuration test" title="Skip configuration test" style={{ width:"60%" }} className="mx-auto" width="1680" height="1160" data-path="sip-trunking/guides/images/zoiper/zoiper-config-test.png" />
  </Step>

  <Step title="Place a call">
    Close the Account settings, open a dialpad, and place a test call.

    <img src="https://mintcdn.com/wavix/sPDk5EfEIf2pkDet/sip-trunking/guides/images/zoiper/zoiper-dial.png?fit=max&auto=format&n=sPDk5EfEIf2pkDet&q=85&s=368798b28ab4dfdaa89d1b7177937851" alt="Zoiper dialpad" title="Zoiper dialpad" style={{ width:"25%" }} className="mx-auto" width="480" height="1160" data-path="sip-trunking/guides/images/zoiper/zoiper-dial.png" />
  </Step>
</Steps>

All destination phone numbers must be in the E.164 international format. This format can handle numbers with up to 15 digits and is usually written as `[+][country code][subscriber number including area code]`. For example, a US number in E.164 format would be `+16561223344`. Wavix will reject calls to numbers without a country code or carrying national access codes.

| Country     | Number          | Reason                                               | Number in E.164 format |
| :---------- | :-------------- | :--------------------------------------------------- | :--------------------- |
| US          | `6561223344`    | No country code                                      | `+16561223344`         |
| UK          | `020 1122 3344` | No country code, national access code with leading 0 | `+442011223344`        |
| Switzerland | `0041797000777` | Leading 00 international prefix                      | `+41797000777`         |

## Configure inbound calls

For calls to be routed to your Zoiper instance, follow these steps in your Wavix account:

1. **Sign in** to your Wavix account
2. Navigate to **My numbers** under **Numbers & trunks** in the top menu
3. Click on the three dots next to the number you want to edit (right-hand side) and select **Edit number**
4. Select the destination trunk in the **Destination** section
5. Click **Add** to add the destination for the phone number
6. Click **Save** to apply the settings

<img src="https://mintcdn.com/wavix/sPDk5EfEIf2pkDet/sip-trunking/guides/images/zoiper/zoiper-inbound.png?fit=max&auto=format&n=sPDk5EfEIf2pkDet&q=85&s=6924ebee6b87371b598cf4e575369799" alt="Wavix phone number configuration" style={{ width:"50%" }} className="mx-auto" width="2080" height="2120" data-path="sip-trunking/guides/images/zoiper/zoiper-inbound.png" />

You can also edit multiple numbers simultaneously. To do this, select the multiple numbers you want to modify, then click the **Bulk actions** button. The changes will apply to all selected numbers.