# Configure Media Service (Packet Rate)

To configure packet rate:

1. From the navigation tree, click Offline Configuration > Edit Offline Configuration. The Offline Configuration navigation tree opens.

2. When prompted to Duplicate Active Configuration, click Yes.

3. In the navigation tree, click Media Service.

4. In the Packet Rate list, select one of the following:

   - Fixed Packet Rate: select this option to maintain a fixed packet rate of 20 ms. If a call requiring a non-standard packet rate is made to the NuPoint UM system, it may result in audio distortion.

   - Variable Packet Rate: select this option for MCD Release 4.0 (3300 ICP Release 10.0) and later to allow successful streaming of calls that may require a non-standard packet rate.

5. In the navigation tree, select Commit Changes and Exit. Confirm the commit. Your changes are now saved to the duplicate (inactive) configuration. Configuration changes will not take effect until you have activated the inactive configuration.