I had have an Arris SBG67832-AC and only 1 upstream channel out of 4 was bonding. Comcast tech support told me my modem was bad. I purchased a new Modem Netgear C6300. 16 Down 4 Up channels. Still only getting 1 Upstream channel bonding. with the new Modem. Down load speeds are 150 Mbs upload speed is only 10Mbs. Comcast tech support said my modem is bad. Find very hard to believe new modem is having same issue.
What do the modem's signal stats look like ? Refer to the User Manual here for login to the user interface instructions here;
Please post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.
The upstream power is too high / out of spec. The downstream power is too weak as well. That can cause random disconnects, spontaneous re-booting of the modem, speed and latency problems, and the un-bonding of channels.
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.
After self troubleshooting these are my reading now. They changed a little. My upstream channel is now 3 instead of 1. My spltter is the one Comcast provided.
Still needs work / out of spec. If you can't get it any better, as stated, you should get a tech out to investigate / correct. Good luck with it !
Quite welcome ! Please post back with how things turn out.
They were out today. He put new slitter in my garage where it feeds the hous with a new style with alot less signal loss. He put new weathr proof ends on my outide cable. Huge differnece.
It could still be better..
Hello, rcastle2! I'm glad you reached out to us here about this! I'm glad to see that your levels are looking much better. Have you had a chance yet to run some speed tests to see if you are back to the speeds you are subscribed to? I'd like to make sure we get this 100% taken care of for you. 🙂
I look forward to your update.
rcastle2, as I have not heard back from you in some time, I have closed this thread to further comments. I hope you were able to troubleshoot and get better speeds, but if you still need assistance, please feel free to start a new thread.