# Change a Provisioned Gateway

Centralized provisioning rolls out the same configuration to every gateway at once, but you can still fine-tune an individual device afterward. Use this procedure when one gateway needs different general or codec settings than the rest.

:::note[What a gateway is]
A gateway is a device that connects outside phone lines (analog, ISDN, or cellular) to your Cloud Voice PBX (Private Branch Exchange, the system that routes calls between extensions and the outside world). "Provisioned" means the PBX has already pushed a base configuration to this device, so here you are only changing what is different about this one gateway.
:::

## Procedure

1. Sign in to the PBX web portal and open **Auto Provisioning > Gateways**, then open the gateway you want to change.

   :::note
   The **Auto Provisioning > Gateways** page lists every gateway the PBX manages. Editing an entry here changes only that single device, not the shared provisioning template used for the others.
   :::

2. Update the values you need in the **Preference** and **Codecs** sections, then click **Save**.

   - **Preference** holds the gateway's general settings.
   - **Codecs** controls the audio formats the gateway uses (a codec, short for coder/decoder, compresses voice so it can travel over the network) and the order in which the gateway offers them.

   :::caution[Codecs must match on both ends]
   The gateway and whatever it connects to (the PBX or your carrier) have to share at least one codec. If they have none in common, calls fail or connect with no audio. Confirm the codec list lines up before you save.
   :::

   After you click **Save**, the PBX asks whether you want to reboot the gateway.

3. Click **OK** to reboot. The gateway applies your new settings automatically once it finishes restarting.

   :::caution[Rebooting drops active calls]
   Restarting the gateway ends every call currently running through it. Do this during a maintenance window or off-hours whenever you can.
   :::