Hub 4 signals

[TAZMANUK]

Could someone check these hub 4 download and upload channel and signals if they are ok, as speed issues are worse on hub 4 after swapping out hub 3 to see if it would fix the issue, holding out for hub 5 😕

 

 

 

[TAZMANUK]

[Kain_W]

Hi TAZMANUK,

Thanks for your post and welcome back to the community!
Sorry to hear you're facing issues.

From checking our service I can see that you've had a technician appointment booked in.

How is your service now?

Thanks,

[TAZMANUK]

Hi had engineer visit today they swapped the hub 4 to see if that was the issue fingers crossed

[TAZMANUK]

On the downstream on channel 3 I've 106 pre rs errors than then reduce to 7 then go back up again, is this something to be concerned about

 

[TAZMANUK]

 todays 240 pre rs errors on channel 3 and only effected channel rest are zeros, why is this please

[TAZMANUK]

They seem to get higher these pre rs errors

 

[TAZMANUK]

Done a reboot of the hub 4 which seems to of addressed the channel 3 high pre rs errors

[TAZMANUK]

24 hours after reboot it seems other channels are getting these pre rs errors now, before all channels was zero, since hub change that was faulty this one is doing pre rs errors which was usually only one channel downstream 3 and highest was about 512 now a few more have them.

Would this effect speed, if so looks like another new hub 4 😕

 

[TAZMANUK]

Also how come our area is still on upstream 16QAM surely should be 32QAM or 64QAM by now

[Andrew-G]

Pre-RS errors are not normally a concern - these are errors that are corrected "on the fly" by the hub's error processing, and have no impact on performance.  Post-RS errors are different - they're uncorrected errors and can affect performance.  Your main problem appears to be an SNR fault on the upstream, because the hub is dropping modulation.  Whilst a vast simplification, you can consider dropped modulation as the hub reducing the data rate, and it does this because the connection to VM's network equipment is too noisy.  That will often affect both speed and connection reliability, as the hub needs to continuously communicate with the network equipment in order to stay connected.  

Looks to me like you need another technician visit, because poor or variable SNR will not resolve itself.  Having said that, when you first posted last year, you had a Hub 4 in an area that was not enabled for DOCSIS 3.1 (gigabit speeds).  Normally that only happens when an area is over-utilised, and that's VM speak for congestion caused by over-selling of new contracts relative to capacity.  Sometimes that's a factor in poor speeds and reliability.  Setup a BQM which will show if anything odd is going on with your VM connection.  Post a LINK to a LIVE, SHARED graph here and we'll see what's happening, although usually needs to run for 24 hours before we can draw reasonable conclusions.  A live graph (as opposed to a snapshot) will continuously update so you can post the link immediately.