OLT and ONU communication defined in ITU G.984.3 standard
NOTE 1 – OLT waits at least 750
μ
s for the ONU to process the message.
NOTE 2 – ONU clears LOS/LOF error.
NOTE 3 – ONU constructs the preamble and delimiter and sets pre-assigned delay.
NOTE 4 – ONU constructs extended preamble.
NOTE 5 – ONU randomizes a response time and constructs Serial_Number_ONU PLOAM message.
NOTE 6 – OLT analyses incoming PLOAMs and associates ONU-IDs with serial numbers.
NOTE 7 – ONU stores assigned ONU-ID.
NOTE 8 – ONU prepares response PLOAM.
NOTE 9 – OLT measures time until response is received and calculates the adjustment to the ONU's Equalization Delay.
NOTE 10 – ONU updates its equalization delay.
NOTE 11 – Transmissions are in consecutive frames.
NOTE 12 – Downstream frame with empty BWmap (creates 125
μ
s of "quiet window").
NOTE 13 – BWmap should be constructed according to clause A.6.4.2.
NOTE 14 – To complete the SN request window (per clause A.6.4.2) the first StartTime in this frame should follow the margins described in clause A.6.4.2
(approximately 2
μ
s).
NOTE 15 – BWmap should be constructed according to clause A.6.4.2.
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