FEC hatası neden olur ve nasıl çözülür?

Modemde yazan sistem çalışma süresi 12 saat 16 dakikaymış hat değerlerim şu şekilde,
(Hangi kısmın önemli olduğunu bilmediğim için yazan herseyi yazıyorum)

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xDSLFwVersion: FwVer:5.12.21.0_B_A60901 HwVer:T14.F7_0.0
Line State: Up
Modulation: ITU G.993.2(VDSL2)
Annex Mode: ANNEX_B

INP downstream: 49871
INP upstream: 15194
shineGINPdownstream: 0
shineGINPupstream: 0
reinGINPdownstream: 0
reinGINPupstream: 0

TPSTC type: 64/65B PTM TC

near-end interleaved channel bit rate: 0 kbps
near-end fast channel bit rate: 69970 kbps
far-end interleaved channel bit rate: 0 kbps
far-end fast channel bit rate: 8180 kbps

near-end FEC error fast: 1221674601
near-end FEC error interleaved: 0
near-end CRC error fast: 1274637
near-end CRC error interleaved: 0
near-end HEC error fast: 0
near-end HEC error interleaved: 0
far-end FEC error fast: 0
far-end FEC error interleaved: 0
far-end CRC error fast: 1
far-end CRC error interleaved: 0
far-end HEC error fast: 0
far-end HEC error interleaved: 0
DSL uptime :12:15, 42 secs
DSL activetime :0 min, 14 secs

Downstream:
relative capacity occupation: 100%
noise margin downstream: 3.1 dB
output power upstream: 8.8 dbm
attenuation downstream: 10.6 dB

Upstream:
relative capacity occupation: 100%
noise margin upstream: 23.2 dB
output power downstream: 14.0 dbm
attenuation upstream: 0.2 dB

Bit table:
carrier load: number of bits per tone
tone 0- 31: 00 00 00 00 00 00 00 00 00 00 00 00 12 12 12 22
tone 32- 63: 20 00 78 89 99 99 aa 9a aa aa ab bb bb bb cc cc
tone 64- 95: cc cd cc dd dd dd dd dd dd dd dd dd dd dd de dd
tone 96-127: ed de ee dd dd dd dd dd dd dd dd dd dd dd dd dd
tone 128-159: dd dd dd dd dd dd cd dd dd dc dd dd dc cd cc cc
tone 160-191: cc cc cc cc cc cc cb cb bb cb bc bb cc cb bb bb
tone 192-223: bb bb bb ba ab aa aa 76 99 99 a9 99 98 99 88 99
tone 224-255: 88 88 88 87 87 87 88 88 88 89 89 99 89 89 98 98