Full name of ITU-T Y.1731

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The full name of ITU-T Y.1731 is "OAM functions and mechanisms for Ethernet based networks".

Other related questions:
What accuracy can Y.1731 of an S series switch achieve
S series modular switches with an ES0D00FSUA00 enhanced flexible service subcard can achieve microsecond-level detection. Otherwise, a switch in normal cases can achieve 1 ms detection, and the detection time may be 30 ms in extreme conditions. The average accuracy of jitter measurement is 50 ms. S series fixed switches including S5700LI, S5700SI, S5700S-LI, and S2750 support an average latency of 1 ms, which may be 30 ms in some cases. It is recommended that S5700HI switches be used when customers have high requirements on performance. On average, S600-E series switches support 1 ms latency, which sometimes may extend to 30 ms.

Full name of HFEC and SDFEC
HFEC means hard-decision FEC, and SDFEC means soft-decision FEC, as shown below: HFEC: High Performance Forward Error Correction SDFEC: Soft Decision Forward Error Correction

Full name of the LSQ board
LSQ is a type of 40 Gbit/s wavelength conversion board. It maps one client-side STM-256, OC-768, or OTU3 optical signal into one ITU.T G.694.1–compliant OTU3 signal.

Full name of the THA board
The THA board is a type of 16 any-rate port service processing board.

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