---
schema_version: "1"
id: 441f954fdd199bec4e710f5dc920d0dad61db4850f35a813652c7c18017fa01b
title: Create an Interface Implementation
collection: developer
version: current
locale: en-us
portal_url: https://docs.salesforce.com/developer/current/en-us/industries/cme/guides/comms-t-create-an-interface-implementation.md
canonical_url: https://developer.salesforce.com/docs/industries/cme/guide/comms-t-create-an-interface-implementation.html
source_site: developer.salesforce.com
content_type: documentation
content_hash: 1516fdd04369db4f911dab107a7199cfd38aa71a72010f9be7ba1b3d5816676b
products:
  - Communications, Media, Energy and Utilities APIs (Managed Package)
  - Industries Developer Documentation
---
# Create an Interface Implementation

As part of overriding the 255-character limitation, you need to create an interface implementation.

1.  In your org, go to the **App Launcher** and click **Interface Implementations**.

2.  Click **New**.

3.  In **Interface Name**, enter `DCAPIParamsInterface`.

    **note:** Ensure that you name this interface correctly. When this interface exists, the parameters specified in this iinterface override the default parameters.

4.  In **Active Implementation Class**, enter the name of the Apex class that you just created, `DCAPIParamsImplementation`.

5.  Click **Save**.

6.  Click **Related**.

7.  Go to Interface Implementation Detail and click **New**.

8.  In **Available Implementation**, enter the name of the Apex class that you just created, `DCAPIParamsImplementation`.

9.  Click **Active** to activate this implementation.

10. Click **Default** to set this as the default implementation.

11. Click **Save**.