Regular Visitor
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4 Messages
Not getting anywhere close to proper download speeds
I just worked with a Comcast Support representative to replace my 11 year old DOCSIS 3.0 modem that could only support speeds of up 135 Mbps. I replaced it with a new ARRIS SB6190 modem. During this interaction, my speed plan was changed from 400Mbps to 800Mbps. When I got off the phone after confirming Internet was working, I ran a speed test and the max download speed I was getting was 110Mbps. I have tested from multiple devices on the same network with no change. I also removed my router from the equation with no difference. This does not make any sense whatsoever as the previous 11 year old modem had higher download speeds than my brand new modem. I have attached screenshots of the modem status page. I would really like to get some answers here as I am now paying for an eighth of the speed that I am promised.
EG
Expert
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108.3K Messages
1 year ago
This may or may not be the root cause of the problem (YMMV) but it should be addressed regardless.
The upstream power is on the high side and it may be intermittently fluctuating even higher to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.
In an effort to try to obtain better connectivity / more wiggle room, check to see if there are 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 from Home Depot, Target, Wal-Mart, etc. Splitters should be swapped with known to be good / new ones to test.
Also check the coax cable for any damage such as cuts, nicks, abrasions, kinks, sharp bends, etc.
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.
Good luck with it !
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OakStreet
Visitor
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5 Messages
1 year ago
I can only sympathize with you. I have a download speed of 4 mbps right now on my Roku. Yes, I have an outdated modem. Yes, I have the lowest tier of service. Yes, the box outside is so old and stuffed with cables it doesn't close. But I am convinced Xfinity throttles customers, and I think it has failed to invest in infrastructure adequate to provide us with the service we are paying for. I think football season ovetaxes their inadequate infrastructure and instead of fixing their problem, they put the blame on customers. My 2 cents.
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