# To Restore NuPoint UM PPP Service

If you disabled the NuPoint UM PPP service to use COM1 for a serial connection, and later, you decide to use COM1 for PPP again, you can restore the PPP service as follows:

1. Remove the null modem serial cable between the PMS serial port and the NuPoint UM COM1 port.

2. Connect a serial-based dial-up modem to the NuPoint UM COM1 port.

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

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

5. In the navigation tree, click External Applications and then click Serial Port 1.

6. In the Application list, select NP-UM PPP Service.

7. Click Save.

8. 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.

Parent topic: Installation using Physical Serial Port