Welcome to Comcast Help & Support Forums
Find solutions, share knowledge, and get answers from customers and experts

New to the Community? Start here.

5,665,043

members

48

online now

1,836,868

discussions

Back to Top

Extreme 105 Service very slow (10-20Mbps)

Posted by
Visitor
  • Congrats on Posting your first topic!

Message 1 of 2
117 Views

Hello,

 

My internet speed has seemed crippled for the past month. It seems that my speeds are way slower than they should be, sometimes around 20 down/ 12 up. What should my next steps be? I've always had luck when comcast "reprovisioned" the modem or sent a signal down to it. I've checked connections and everything seems ok and importantly has not changed before this performance drop.

Attached is a picture of some of the model signal tables.

 

 

1 REPLY
Posted by
Connection Expert

Message 2 of 2
91 Views
The upstream power is too high and may be intermittently fluctuating even higher out of spec. That can cause random disconnects, spontaneous re-booting of the modem, and speed 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 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<br><br>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.



Community Icon
I am not a Comcast employee, I am a paying customer just like you!
I am an XFINITY Forum Expert and I am here to help. For information on the program click here.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark it as an accepted solution!solution Icon
Community Icon
I am not a Comcast employee. I am a paying customer just like you!
I am an XFINITY Forum Expert and I am here to help.
We ask that you post publicly so people with similar questions may benefit.
Was your question answered? Mark it as an accepted solution!solution Icon
Community Icon
I am not a Comcast employee.

Was your question answered?
Mark it as a solution!solution Icon