Multi-rate burst-mode receiver

An optical line terminal, OLT, configured to communicate in a passive optical network with one or more optical network units, ONUs;

• wherein optical burst signals transmitted by the one or more ONUs have respective symbol rates;
• and wherein the optical line terminal comprises a burst-mode receiver configured to decode an optical burst signal from an ONU to a decoded output signal by one or more digital signal processing circuitries that process a signal at respective configurable processing rates;
• the optical line terminal comprising:
• at least one memory configured to store program instructions;
• and
• at least one processor configured to execute the program instructions and cause the optical line terminal to perform,
• obtaining the symbol rate of a next optical burst signal;
• and
• adjusting, during an interval between reception of valuable symbols within a previous optical burst signal and the next optical burst signal, the configurable processing rate of one or more digital signal processing circuitries based on the symbol rate of the next optical burst signal.