Observer

very slow upload

My last 11 speed tests (in Mbps) have been:

August, 05, 2016 10:45 PM1.26August, 05, 2016 10:45 PM11.6
August, 18, 2016 8:17 PM0.28August, 18, 2016 8:17 PM1.15
August, 20, 2016 9:17 AM1.6August, 20, 2016 9:17 AM2.18
August, 20, 2016 11:54 AM0.54August, 20, 2016 11:54 AM2.67
August, 20, 2016 12:01 PM1.31August, 20, 2016 12:01 PM5.31
August, 20, 2016 12:34 PM1.83August, 20, 2016 12:34 PM5.23
August, 20, 2016 12:44 PM7.53August, 20, 2016 12:44 PM6.01
August, 20, 2016 12:48 PM139.91August, 20, 2016 12:48 PM2.38
August, 20, 2016 4:41 PM126.7August, 20, 2016 4:41 PM2.44
August, 20, 2016 7:57 PM133.73August, 20, 2016 7:57 PM6.92
August, 20, 2016 9:41 PM137.87August, 20, 2016 9:41 PM3.34
August, 20, 2016 10:07 PM160.06August, 20, 2016 10:07 PM3.76

 

I had my coax running through a surge protector on my UPS and after seeing the abysmal performance above this morning, I cut it out and starting at 11:54 AM you can see my download picked back up (still not what it has been at) but my uploaded stayed slow.

 

Prior to that, I have data from the following speed tests:

June, 16, 2016 5:57 PM231.55June, 16, 2016 5:57 PM17.91
June, 18, 2016 4:37 PM139.76June, 18, 2016 4:37 PM5.02
June, 19, 2016 2:44 PM227.62June, 19, 2016 2:44 PM23.27
July, 02, 2016 12:51 AM199.45July, 02, 2016 12:51 AM21.65
July, 03, 2016 10:52 PM215.93July, 03, 2016 10:52 PM22.11
July, 03, 2016 10:55 PM219.66July, 03, 2016 10:55 PM21.82
July, 08, 2016 10:48 PM160.61July, 08, 2016 10:48 PM17.49
July, 10, 2016 8:35 PM213.08July, 10, 2016 8:35 PM23.19
July, 14, 2016 6:26 PM6.42July, 14, 2016 6:26 PM15.37
July, 14, 2016 6:31 PM6.8July, 14, 2016 6:31 PM14.76
July, 14, 2016 7:34 PM2.26July, 14, 2016 7:34 PM7.71
July, 14, 2016 7:46 PM1.43July, 14, 2016 7:46 PM9.23
July, 14, 2016 8:06 PM21.55July, 14, 2016 8:06 PM12.53
July, 14, 2016 8:27 PM3.88July, 14, 2016 8:27 PM7.09
July, 14, 2016 8:35 PM19.66July, 14, 2016 8:35 PM19.09
July, 15, 2016 6:53 AM9.44July, 15, 2016 6:53 AM17.57
July, 15, 2016 5:59 PM229.74July, 15, 2016 5:59 PM21.25
July, 15, 2016 6:03 PM214.63July, 15, 2016 6:03 PM22
July, 15, 2016 6:26 PM183.86July, 15, 2016 6:26 PM21.44
July, 15, 2016 9:52 PM183.35July, 15, 2016 9:52 PM21.75
July, 16, 2016 7:55 AM174.7July, 16, 2016 7:55 AM23.69
July, 16, 2016 1:00 PM186.09July, 16, 2016 1:00 PM22.45
July, 20, 2016 6:19 PM150.73July, 20, 2016 6:19 PM21.94

 

The coax was running through the UPS from July 10-August 20. As you can see I had good performance before the UPS and then ran into some issues on July 14 which corrected themself by the 15th and basically ran okay up until August 5th (although the download speed dropped a bit). And between August 5 and August 18 I don't recall any performance issues either.


Here are modem stats from this morning when I was seeing sub 1 Mbps downloads and 1-2 Mbps Uploads (coax through UPS):

 

And after I went directly from the wall to the modem (which greatly improved download speed):

 

Any thoughts/comments/tips?

9 REPLIES 9
Newcomer

Re: very slow upload

You have UPNP disabled? What devices are connected during tests? Is there construction around your neighborhood?
Observer

Re: very slow upload

UPnP has been on for all of the above tests but I have just turned it off now to see if it makes a difference.

In terms of connected devices, that too hasn't changed over the course of the tests.

And as for construction - possibly, but not in my very immediate area but a little further out.

Sharer

Re: very slow upload

I don't see your download speed picking up till 12:48pm, not 11:54am, unless I'm misreading what you described.  Regardless, never run coax thru a surge protector, as you found out.  Some of your signal levels via the surge protector were awful.

 

Make sure all your coax connections are a little more than finger tight, anything at all loose will affect the signal and create interference.  I use a small wrench or pliers to very slightly tighten the coax just a bit more than finger tight, at the modem, wall plate, and anywhere else it connects, including TV cable boxes, digital adapters, etc.  Also check the box or pedestal outside to make sure those connections are all snug as well, and not oxidized or corroded.

 

Up till July 10, everything looked pretty good.  "Something" happened after that.  Did you connect or move anything in the system?

Observer

Re: very slow upload

Hi glenvee, you are correct - I had mentioned the wrong time. After I had gone directly from the outlet to the modem, the download picked back up.


A TWC Tech was out the week of July 11-15 as I requested grounding be checked due to storm damage taking out my previous modem (and onboard NIC) at the end of June, and he said everything outside looked good (I'm not sure where the box/pedastal is out there).


July 10 was when I installed the UPS, and it was okay until the 14th when I saw that massive drop in performance but it corrected itself on the 15th so I figured it was just some TWC issue. And then until July 20 it was basically at pre-UPS speeds although the download dropped a bit, but upload stayed at 21 Mbps+. I will double check the tightness - I only have the modem connected.


And then up to August 5, I hadn't noticed any performance issues either. But with it coming and going like it has, I started to think maybe there was some underlying issue.

Sharer

Re: very slow upload

You say a TWC Tech was out the week of July 11-15, and I see your speedtest results dropping suddenly on the 14th.  Do you recall if the low speedtests were before or after the tech came? 

If they didn't drop until after the tech had visited, i suspect he left something loose, or changed something for the worse, outside. 

 

In either case, i'd call TWC back for a return visit, tell them you had near perfect speeds till the tech call, ask for another tech to come.

Expert

Re: very slow upload

The supposed surge protectors in UPS and outlet strips are trash, allowing noise and broadcast tv ingress in.

 You need to also get rid of the extra splitters inline, your downstream level is too low and should be closer to 0dBmv

at a -10 level , it won't be reliable.

if on a splitter for cable tv, the modem must be on the first 2 way after the outside grounding block, there also can't be any empty splitter ports

Low DS levels may also be water logged, rodent chewed lines, overhead or underground.

 

Observer

Re: very slow upload

glenvee - the drop on the 14th had corrected itself by the 15th and I am pretty sure the tech was out on the 12th looking back. Would something he may have done/not done back up cause intermittent performance? i.e. sometimes still good as shown on tests from July 15-20?

Observer

Re: very slow upload

MsRaye - I see now how bad the surge protectors are for signal but the fact that I did have some okay speeds in the past (while going through the UPS) indicate my problem could be further down the line? I don't have cable TV so the only only connected outlet is the one to my modem and I am not using any splitters inside. Is there splitting down outside that could cause an issue? Are my upstream levels okay? As that is where I am seeing the biggest performance hit, currently getting only 20-25% of the 22 Mbps I had been getting. Many thanks

Expert

Re: very slow upload

No, you still have a bad downstream connection. There are splitters in the line that need to be removed, or a water logged outside line.

 This looks like a 4 or 8 way splitter in line or multiple 2 ways.. it needs to be removed and if you have tv as well, the modem needs to be on the first 2 way after the grounding block with all the tv boxes split off the other port of the 2 way.

 What you have now at -8, -9dBmv will not be reliable