# Prohibiting calls via a backup route When describing [outgoing routes](/mikopbx/english/manual/routing/outbound-routing.md), it is allowed to use the same phone number template. If several routes are used with the same template, the PBX will try to make a call on each of the routes until the call is accepted. This functionality is not always necessary and there may be a need to disable it. At the moment, this can only be done through the customization of the PBX. 1. Go to the provider's settings and copy its ID in the browser's address bar:

2. Go to the section "**System file customization**"

3. Go to the editing section of the **extensions.conf** file.

4. Add the following context to the end of the file: ```php [SIP-1687941868-outgoing-after-dial-custom] exten => _X!,1,Hangup() same => n,return ```

Save the changes. Now all calls via routes associated with the provider will occur without taking into account the backup provider. It will work out only the first of the outgoing routes. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.mikopbx.com/mikopbx/english/faq/outbound-routing/prohibiting-calls-via-a-backup-route.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.