The simple answer is yes, different brands of OLT and ONU can be compatible, but practical success depends on matching PON standards, management protocols, and authentication methods, and on handling vendor-specific implementation details. Huawei OptiXaccess S0316 is an active distribution unit (ADU) designed for power over fiber (PoF) scenarios. If you are an ISP buying third-party ONUs to reduce costs, or a technician troubleshooting a registration failure, this is where you start. 984) defines the basic protocol, but it. Are the OLT of Huawei and ZTE compatible with Baudcom's ONU? The answer is yes.