# Termination Gateways **Termination Gateways** define how phone.systems(TM) sends outbound SIP traffic to external destinations, such as third-party SIP termination providers or PSTN networks. Each termination gateway represents a connection to a provider used for outbound calling and is configured under the **Trunks** section. To access and manage termination gateways, click **Trunks** in the sidebar menu and select the **Termination Gateways** tab. [![../../_images/fig157.png](../../_images/fig157.png)](../../_images/fig157.png) **Fig. 1.** Termination Gateways --- ## Creating Termination Gateways To create a new termination gateway: 1. Go to the **Termination Gateways** tab under **Trunks**. 2. Click the [![+-symbol](../../_images/%2B-symbol.png)](../../_images/%2B-symbol.png) button in the lower-right corner to open the **Create Termination Gateway** window. [![Create Termination Gateway window](../../_images/create-gateway.png)](../../_images/create-gateway.png) **Fig. 2.** Creating a termination gateway ### General Settings The **General Settings** section defines the core connectivity and authentication parameters used for outbound calls. | **Setting** | **Description** | | --- | --- | | **Name** | A friendly name for this gateway. | | **Network Protocol** | Specifies the network protocol configuration: - **IPv4 Only** - Only IPv4 addresses are supported. - **IPv6 Only** - Only IPv6 addresses are supported. - **Dualstack** - Supports both IPv4 and IPv6. - **IPv4 Preferred** - IPv4 is preferred, but IPv6 can be used if needed. - **IPv6 Preferred** - IPv6 is preferred, but IPv4 can be used if needed. | | **Transport Protocol** | Specifies the SIP transport method. Available options are: - **UDP** - **TCP** - **TLS** | | **Username** | The username used to authenticate the gateway. | | **Password** | The password used for authenticating the gateway. | | **Host** | The IP address or domain name of the gateway. | | **Port** | The port used on this gateway. Defaults to `5060` if not provided. | | **Allowed Codecs** | Multiple codecs may be selected for call negotiation. Options include: - **OPUS** - **G722** - **PCMU** - **PCMA** - **G729** - **GSM** - **telephone-event** | Note The codec priority may be arranged by dragging the listed codecs into the required position, with the left-most codec being of the highest priority. Important To use DTMF functions such as Interactive Menu options or Feature Codes, ensure that **telephone-event** is included in the Allowed Codecs list. [![Termination gateway general settings](../../_images/fig248.png)](../../_images/fig248.png) **Fig. 3.** Termination gateway general settings ### CLI Rules **CLI Rules** are used to automatically modify the source and destination numbers sent to the termination gateway. This allows you to add or remove prefixes, or rewrite numbers per gateway. | **Field** | **Description** | | --- | --- | | **SRC Name Rewrite Rule** | POSIX Regular Expression pattern used to match the Source Caller Name. | | **SRC Name Rewrite Result** | Replacement text applied when the Rewrite Rule matches. | | **DST Rewrite Rule** | POSIX Regular Expression pattern used to match the destination number. | | **DST Rewrite Result** | Replacement text applied when the Rewrite Rule matches. | Note Knowledge of POSIX Regular Expressions is required to configure CLI Rules. After completing the configuration, click **Save** to create the termination gateway. [![CLI Rules for a termination gateway](../../_images/fig331.png)](../../_images/fig331.png) **Fig. 4.** CLI Rules --- ## Editing Termination Gateways 1. In the **Termination Gateways** list, click the **Actions** button next to the gateway you want to modify. 2. Select **Edit** to open the **Edit Termination Gateway** window. [![Actions Menu](../../_images/fig810.png)](../../_images/fig810.png) **Fig. 5.** Opening the Edit window for a termination gateway 3. Adjust the settings in the **General Settings** or **CLI Rules** sections as required. 4. Click **Save** to apply your changes. [![Edit Termination Gateway window](../../_images/edit_window.png)](../../_images/edit_window.png) **Fig. 6.** Editing a termination gateway --- ## Termination Gateway Relations The **Relations** view provides an overview of all configurations associated with the termination gateway. To access it: 1. In the **Termination Gateways** list, click the **Actions** button next to the gateway. 2. Select **Relations**. [![Actions Menu](../../_images/fig810.png)](../../_images/fig810.png) **Fig. 7.** Opening Relations for a termination gateway This view shows related configurations, such as **Termination Routes**. To navigate to the related section, click the [![gear](../../_images/gear.svg)](../../_images/gear.svg) icon next to the relation. [![Termination Gateway Relations](../../_images/relations2.png)](../../_images/relations2.png) **Fig. 8.** Termination gateway relations --- ## Deleting Termination Gateways 1. In the **Termination Gateways** list, click the **Actions** button next to the gateway you want to remove. 2. Select **Delete** to open the **Delete Termination Gateway** dialog. [![Actions Menu](../../_images/fig810.png)](../../_images/fig810.png) **Fig. 9.** Opening the Delete dialog for a termination gateway 3. To permanently delete the termination gateway and unlink its relations, enable the **Delete and unlink relations** toggle. 4. Click **Delete** to confirm. Note Deleting a termination gateway also deletes and unlinks all associated relations. Unlinking these relations may disrupt connected services. If you prefer not to proceed, close the dialog and update or remove the connections manually. [![Delete Termination Gateway dialog](../../_images/delete_dialog.png)](../../_images/delete_dialog.png) **Fig. 10.** Delete Termination Gateway dialog On this page