---
title: "CusPhoNum"
canonical: "https://kb.myframeworks.com.au/space/FSS/13173429/CusPhoNum"
format: markdown
---
**Flag/Setting Purpose:** Enforce Customer phone number validation - Only Allow Numbers In Customer Phone Numbers

- When enabled, the three **Phone Number** fields on the **Customer Maintenance** screen will be required to be validated against a list of active system validations.

![image](media://bc2ed428-deee-462c-9596-6ed666eb0f6a)

> ⚠️ **Note:** These validations DO NOT apply to the **Fax Number** field.

- When disabled, no validations are enforced on the **Customer Maintenance** screen for the three **Phone Number** fields.