New Member

 • 

13 Messages

Thursday, May 13th, 2021

FEC and CRC Errors

Hello.  We’ve  been experiencing loss of wifi signal and pixelation and freezing on our TVs since last year. Three techs came out last year and changed equipment except our DVR.  Lately, Wifi signal is dropping frequently and tv intermittently freezes/pixelates.   When I call for support we’re told our lines are fine.  So I searched this forum today and rebooted the RG 2 hours ago.  This is the table of errors. Any suggestions or input is greatly appreciated as I don’t understand what these numbers mean. Thank you

DSL Status

Line State Up
Downstream Sync Rate (kbps) 33018
Upstream Sync Rate (kbps) 6652
Downstream Max Attainable Rate (kbps) 51111
Upstream Max Attainable Rate (kbps) 12823
Modulation VDSL2
Data Path Interleaved
  Downstream Upstream
SN Margin (dB) 13.4 16.7
Line Attenuation (dB) 33.7 35.3
Output Power(dBm) 14.5 8.1
Errored Seconds 1 0
Loss of Signal 0 0
Loss of Frame 0 0
FEC Errors 2441 1
CRC Errors 4 0

Timed Statistics

  15 Min Cur Day Showtime Last Showtime Total
Errored Seconds (ES) 0 1 1 1 1
Severely Errored Seconds (SESL) 0 0 0 0 0
Unavailable Seconds (UASL) 0 44 0 0 44
FEC Errors 0 2441 2441 2441 2441
CRC Errors 0 4 4 4 4
DSL Initialization Timeouts 0 0 0 0 0

IPv6

Status Available
Service Type native IPv6
Global Unicast IPv6 Address 2001:506:7e32:183::1
Link Local Address fe80::968f:cfff:fe01:f7f1
Default IPv6 Gateway Address fe80::203:faff:fe65:6bc0
Primary DNS
Secondary DNS
MTU 1500

IPv4 Statistics

Transmit Packets 307802
Transmit Errors 0
Transmit Discards 135
Transmit Bytes 92007565
Receive Packets 4438219
Receive Errors 0
Receive Discards 0
Receive Bytes 5576379661
PTM Receive PDUs 4438219

IPv6 Statistics

Transmit Packets 110
Transmit Errors 0
Transmit Discards 2
Oldest First
Selected Oldest First

ACE - Expert

 • 

37.1K Messages

4 years ago

If you had been up 2 hours when you took these stats, then that's 120 minutes.  2441 FEC in 120 minutes works out to about 20 FEC per minute, which is much less than the AT&T upper limit of 100 per minute.

What kind of TV service are you using on which you are getting "pixelation and freezing"?  (I'm particularly asking do you have U-verse TV or something else).  And is the communication to the TV Wi-Fi or Ethernet (I'm assuming Wi-Fi).


These statistics you're showing are for the line to the AT&T network, and they look pretty good.  They in no way tell anything about your Wi-Fi situation, except that to say that the line looks good, so any problems you're having appear to be with your Wi-Fi.

New Member

 • 

13 Messages

4 years ago

Thank you for you reply.  In more detail these are our issues.  We have U-Verse with three Tvs. Main Tv has the dvr and two tvs use wireless boxes. On all three tvs live tv will randomly freeze/pixelates for few seconds.  This is intermittent and random. On our wireless boxes sometimes the signal strength will be weak or red light, then will go up back to full strength and be fine.

The two wireless boxes were added last year after a tech told us the pixelates was due to coax wiring. he told us this would fix issue but still happens  

Soetimes when we turn on tv with the dvr our tv says message that uverse box is off.  I then need to rest RG

On wifi issues our devices will say we’re not connected to wifi but internet is up and running. This was happening last year too and a tech added a WAP and switched out our RG.  

All problems above resolve after reboot of RG but eventually will happen again.  

I hope this info helps. Its not always convenient to re set the RG

ACE - Expert

 • 

37.1K Messages

4 years ago

While I am not a big fan of coax-connected set tops, I would still take coax over Wi-Fi seven times out of ten.  AT&T decided that wireless was better than coax, largely because its much faster for a tech to set up.

Can you be a little clearer about the actual content of the message when "our tv says message that uverse box is off."  How is the DVR connected to the Gateway?  Ethernet or Coax?  If coax, would Ethernet be at all possible?

Finally, it would be good to check the stats again after you run for a while, particularly after you notice some issues on the TV to see if the CRC errors have gone up.

New Member

 • 

13 Messages

4 years ago

Hello, Our DVR is connected by ethernet and HDMI cable.    All connections are tight. 

Few days ago we turned on dvr tv.  The message said that HDMI device is not on.  The dvr box was on but tv didn’t recognize it was on.  Not sure what to do at that point I restarted the RG.  

Thank you for your info, help and patience.  I will keep eye on CRC errors and if they go up I will call technical support for troubleshooting help.  

Thank you again 

ACE - Expert

 • 

37.1K Messages

4 years ago

If the TV says it doesn't see any signal on the HDMI channel, that could mean that the DVR has failed to HDCP negotiations with the TV and has cut it off.  You could try a different HDMI cable or a different port on your TV (or a component cable set).  Or it could mean the DVR has hardware issues.

New Member

 • 

13 Messages

4 years ago

Thank you. I will try new cable and keep eye on the errors as suggested.  Thank you so much for your guidance.  Have great evening


NEED HELP?