How many FEC errors is normal?

An acceptable FEC rate is 100 per minute or 1500 within 15 minutes or 6000 per hour or less. Line interference from storm, electric motors, noisy ac line can cause increase in FECs.

What is near end FEC?

Near end is data path from the modem, far end is data path to the modem.

What causes near end CRC errors?

CRC (Uncorrected Errors) are usually caused by Induced Noise on the DSL lines. The noise can be from a large motor, fluorescent lights, adjacent DSL lines and various other sources that are close to the DSL lines or blocks.

What are far end errors?

Near end faults are those detected at the exchange in the upstream data. Far end faults are those detected by your home modem in the downstream data.

What are broadband FEC errors?

FEC (Forward Error Correction) errors are simply errors that have been corrected at the home hub end, and have no impact on your actual speed. What does affect speed is CRC (Cyclic Redundancy Check) errors.

What is a good SNR margin?

Signal-to-noise ratio (SNR) Typical values are: 10dB and lower is bad. 11db – 20dB is OK. 20dB – 28dB is excellent.

What is near end and far end crosstalk?

Near-end and far-end crosstalk define the location (or polarity) where a crosstalk signal is measured in an interconnect: near-end refers to the driver side of the victim interconnect, while far-end refers to the receiver side.

What are RS FEC corrections?

RS FEC Corrections – What Is It? FEC is the name for forwarding error correction, which is the process of mathematically correcting the errors. The errors to be fixed are at the receiving end of the data transmission path. This is because the bandwidth is not used for retransmission of errored data.

What do CRC errors indicate?

Cyclic Redundancy Check (CRC) Error indicates when data is corrupted. Calculating from all data, CRC validates packets of information sent by devices and verifies it against the data extracted, ensuring its accuracy.

Do FEC errors matter?

Re: FEC Errors FEC errors have been corrected by your router. There is no need to reduce them because they have little or no impact on your throughput (some CPU cost but not likely an issue for most routers).

What causes high CRC?

There are many reasons a CRC error can occur. One of the most common reasons for this error is a packet error, which occurs when network communications are bad or go in and out. This creates vulnerability for invalid data to be placed into the file. Some other possible reasons are exposure to noise and poor wiring.

What is a bad noise margin?

If the noise resistance is lower than 6 dB, the communication may be interrupted frequently. If the noise resistance is higher than 10 dB, the line has good parameters for data transmission. The higher the value, the better the line quality. The ‘Noise margin’ value should be 6 dB and higher.