# Enforce E164 Format for Vendor Trunk

In this article, I will talk about how you can enforce E164 formatted DNIS be sent to your Egress Vendor. Assuming this Vendor is for US traffic and US DNIS have the following format:

* 11 digits with +
* 10 digits without +

You can setup Action rules as follows:

![](/files/-MYWOelBPorV7m5e74N1)


---

# 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://v5cookbook.denovolab.com/troubleshoot/enforce-e164-format-for-vendor-trunk.md?ask=<question>
```

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.