hpnicfEponDeviceObjectModes 1.3.6.1.4.1.11.2.14.11.15.2.42.4.1.1.1.1.1.2

This variable defines the mode of the EPON device. When an olt(1) it is an Optical Line Terminal device (server) and when an onu(2) and Optical Network Unit device (client)