Systems, devices and techniques for automatically configuring a Demarcation device in a communication network based on DOCSIS provisioning over EPON. A method can be implemented to include initializing a Demarcation device and an optical network unit device (ONU) that is connected to the Demarcation device; operating the Demarcation device to establish a communication with the ONU and to obtain configuration information of the ONU; operating the Demarcation device to communicate to a back-office system in the network regarding information of the Demarcation device, the information including capabilities associated with the Demarcation device; operating the back-office system to generate a service configuration file and to send the generated service configuration file to the Demarcation device; and operating the Demarcation device to process the service configuration file from the back-office system and to update communication services provided by the ONU based on the service configuration file from the back-office system.