System and method for gpon OLT and superior clock synchronization in tod business scenario
A business scenario and clock synchronization technology, which is applied in time division multiplexing systems, selection devices for multiplexing systems, electrical components, etc. Achieve the effect of ensuring clock accuracy and reducing upgrade costs
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[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0037] see figure 1 As shown, the GPON OLT and the upper-level clock synchronization system in the ToD business scenario in the embodiment of the present invention include a GPON OLT and a clock module. The GPON OLT is used to implement the access control and service framing functions defined by the GPON standard. The clock module is GPON OLT's "external watch" maintains a precise time (time unit; second + nanosecond), and assists GPON OLT to record the precise time at a specific moment.
[0038] The GPON OLT is respectively connected to the clock module through the data line, the GPON frame start time signal line, the ready-to-sampling signal line, the sampling result signal line; the GPON frame start time signal line is controlled by the PON MAC hardware of the GPON OLT (the physical layer device of the PON port) ) specified. The GPON OLT ...
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