Slow speed tests - 4mbps DL on Extreme Pro

Hi, I watched that already before posting, but nothing seemed to help. Any other ideas? Thanks

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@eamims wrote:

Have been on the 150mbps plan and today went to the 600 Extreme Pro.

 

Using Arris SB6183 and an Orbi setup in a typical house (my main computer is hardwired to the main Orbi).

 

I get around 4 or 5mbps test results DL, with around 20mbps upload. Repeatable, across multiple speed test sites and on different devices around the house, including the Orbi device's own speed test. Same results if I hardwire directly to the modem, bypassing the Orbi altogether.

 

What gives? I can still watch Youtube videos, including 4K, etc.. are the speed tests just giving me false readings?

 

Thanks

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Start here;

https://forums.xfinity.com/t5/Your-Home-Network/Connection-Troubleshooting-Tips/m-p/1253575#M94474

Post the requested info from here;

https://forums.xfinity.com/t5/Your-Home-Network/Information-Requested-for-Connection-Related-Posts/m-p/1253381#M192739

SB6183

Haven't had time at home to make a tech call to Comcast yet regarding it.

See images:

The downstream power is on the weak side and the upstream power is on the high side, and they may be intermittently fluctuating even farther to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, and latency problems.

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.