business voip

How to add a Cisco 303G

Remove the phone from the box and place it near a location that has an active Internet connection and power outlet. Plug the Ethernet cord into the port labeled LAN and connect the other side to a router, switch or active wall port. If you have purchased your Cisco 303G from Nextiva, you will follow these steps.

How to set up a Cisco 303G from Nextiva Portal:

  1. For administrators, log in to the NextOS Portal by going to and selecting Customer Login from the top right corner. Enter your login credentials and click Sign in. Select Sites & Employees then click on Login under the Admin Login column. Click Users and search for the employee whose information you wish to edit. Click Edit.
    For users, log in to the Customer Portal by going to
  2. Select View & Edit Devices. Click Add New Device and your Nextiva device(s) will display automatically on this page. Once you have found your phone on the list, make sure you know the MAC Address so you can properly assign the phone.
  3. To assign this phone, click Sites & Employees, and select Edit next to the employee’s name who you wish to edit. To assign this device to the employee, click Assign New Device under the Assigned Devices Section, select the device (look for the MAC address), and assign it to the user. Reboot the device to display the new extension.

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