# Connect Cloud Voice to the TA810 FXO Gateway

The TA810 is an analog gateway with eight FXO (Foreign Exchange Office) ports. An FXO port terminates a physical phone line coming from the PSTN (Public Switched Telephone Network) or an analog phone service. By pairing the gateway with Cloud Voice over SIP (Session Initiation Protocol, the standard for setting up voice calls), those eight lines become trunks that your PBX (Private Branch Exchange, the phone system) can route calls across. The link is built from two matching pieces: an account trunk on the PBX and a register trunk on the gateway that authenticates against it. This page covers both.

:::note
The PBX must be running version 84.10.0.30 or later.
:::

## Step 1: Create an account trunk in Cloud Voice

1. Sign in to the PBX management portal and go to **Extension and Trunk > Trunk**, then click **Add**.
2. Under **Basic**, fill in these fields:
   - **Name**: A label that makes the trunk easy to spot later, such as `Connect-to-TA810-Gateway`.
   - **Trunk Status**: Set to **Enabled**.
   - **Select ITSP Template**: Choose **General**. ITSP stands for Internet Telephony Service Provider; the General template applies plain SIP settings, which is what this gateway link needs.

   ![Basic trunk settings with a name entered, status set to enabled, and the General template selected](/images/pbx/account-trunk-on-cloud-pbx-for-fxo.png)

3. Under **Detailed Configuration**, set the following:
   - **Trunk Type**: Choose **Account Trunk**.
   - **Transport**: Choose **UDP** (User Datagram Protocol).
   - **Username**: Enter a username for the trunk.

     :::note
     This username doubles as the trunk number.
     :::
   - **Password**: Enter a password to pair with that username.
   - **Use User Name as Account Trunk's Authentication Name**: Turn this on so the trunk authenticates with its username.

   ![Detailed configuration set to Account Trunk over UDP with username and password fields completed](/images/pbx/account-trunk-on-cloud-pbx-for-fxo-detail-new.png)

4. Click **Save**, then **Apply**.

## Step 2: Create a register trunk on the TA810 gateway

1. Sign in to the gateway's web interface and go to **Gateway > VoIP Settings > VoIP Trunk**, then click **Add New Trunk**.
2. In the dialog that opens, enter the following:
   - **Trunk Type**: Choose **Trunk**.
   - **Type**: Choose **SIP**.
   - **Provider Name**: A label to identify the trunk.
   - **Hostname/IP**: The domain name and SIP port of your PBX. In this example, `pbx.example.com` with the default SIP port `5060`.
   - **Domain**: The domain name of your PBX, for example `pbx.example.com`.
   - **User Name**: The trunk username from the PBX, for example `6700`.
   - **Authorization Name**: The same username from the PBX, for example `6700`.
   - **Password**: The trunk password from the PBX.

   :::caution
   The **User Name**, **Authorization Name**, and **Password** must match the account trunk you created on the PBX in Step 1 exactly, including capitalization. If any of them differ, the gateway cannot register and the trunk stays down with no obvious error.
   :::

   
   ![Cloud Voice, VoIP trunk configuration on the TA810 gateway pointing at the PBX domain and SIP port](/images/pbx/gateway-voip-trunk-connect-to-pce-new.png)

3. Click **Save**, then **Apply Changes**.

## Verify the connection

Confirm the trunk registered from both ends:

- In the PBX management portal, open **Extension and Trunk > Trunk**. A healthy connection shows a green status indicator ![connected](/images/pbx/trunk-ok.png) next to the trunk.
- In the gateway's web interface, go to **Status > System Status > Port/Trunk Status**. A healthy connection reports the trunk as **Registered**.

Once both sides confirm, Cloud Voice is linked to the TA810 gateway and its eight FXO trunks are available on the PBX.

## Next steps

- To place outbound calls over the new FXO trunks, see [Make Outbound Calls through the Extended FXO Trunks](/pbx/integrations/cloud-voice-ta/make-outbound-calls-through-the-extended-fxo-trunks/).
- To receive inbound calls over them, see [Receive Inbound Calls through the Extended FXO Trunks](/pbx/integrations/cloud-voice-ta/receive-inbound-calls-through-the-extended-fxo-trunks/).