# Termination Routes

Comprehensive and flexible route configuration options are available,
with multiple routes being able to share outbound gateways if required.
Routes add flexibility for routing outbound calls, such as using
different service providers when calling specific countries so as to
minimize calling costs or to localize dialing patterns when calling a
specific country.

At least one route must be created and assigned to a previously
configured outbound gateway.

To access and manage your termination routes, click **Trunks** in the sidebar menu and select the **Termination Routes**
tab.

![../../_images/fig433.png](../../_images/fig433.png)


**Fig. 1.** Termination Routes



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## Adding and Configuring Termination Routes

**Step 1.** To add a new termination route, click on the ![+-symbol](../../_images/%2B-symbol.png) button.
Alternatively, click on the **Edit** button to modify a previously configured route.

![../../_images/fig715.png](../../_images/fig715.png)


**Fig. 1.** Editing And Creating Termination Routes

**Step 2:** Input the **General Settings**:

- **Name:** a friendly name to identify the route.
- **SRC Prefix (optional):** The source prefix which defines the outbound
  CLI that will cause this route to be selected. Leaving this field
  empty implies that this route may be used with any CLI. If several
  routes are added with the same starting prefix digit (for example 3,
  37, 371), then the route with the closest match to the CLI will be
  used for the call.
- **DST Prefix (optional):** The called destination prefix that will cause
  this route to be selected (for example dialing 44 for the United
  Kingdom). If this route may be used for calling any destination, then
  the DST Prefix should be left blank. If several routes are added with
  the same starting prefix digit (for example 3, 37, 371), then the
  route with the closest DST prefix match will be used for the call.
- **Gateway:** The outbound gateway that is assigned to this route.

![../../_images/fig530.png](../../_images/fig530.png)


**Fig. 2.** Configuring Termination Routes

**Step 3:** Configure CLI Rules (Optional):

The **CLI Rules** are available for the modification of source and destination numbers, allowing users to include
rewrite rules such as adding prefixes to numbers or deleting country codes from numbers on a per-route basis.

- **SRC Rewrite Rule/Result (optional):** Modifies the source number that
  phone.systems(TM) sends to the provider's termination gateway.
- **DST Rewrite Rule/Result (optional):** Modifies the calling destination
  number that is sent to the provider's gateway.

![../../_images/fig619.png](../../_images/fig619.png)


**Fig. 3.** CLI Rules

If no changes are required to be made to the numbers when making
outbound calls, then the Rule and Result fields should be left blank.

Note

Knowledge in using POSIX Regular Expressions is required in order to use this feature.

**Step 4:** Click **Save** to finalize and create or edit your termination routes.

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