Visitor
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3 Messages
Downstream channels becoming unbonded with Motorola MB8611.
I recently upgraded my internet to the 1200 Mbps package, and ever since I haven't been getting the speeds. I have tried 3 different modems and they all come to the same conclusion that the downstream channels become lost. I have tried 2 of the Netgear Nighthawk CM2000 modems and one of the Motorola MB8611 modem. I had a tech come out and said that everything was good on his end, but he couldn't figure out why my modem wasn't getting the speeds that his meter could. The tech told me that that modem was getting stuck in DOCSIS 3.0 but the speeds weren't even close to maxing out 3.0 speeds.
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EG
Expert
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110.4K Messages
3 years ago
Some of the downstream channel SNR's are too low / out of spec. 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 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 5-1000 MHz, bi-directional, and no gold colored garbage from Radio Shack, Home Depot, Target, 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, 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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user_b9a724
Visitor
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3 Messages
3 years ago
All the lines in the house have been replaced with new cable, and from the box is new as well. Single line with no splitters or splices. The line is only used for internet.
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user_b9a724
Visitor
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3 Messages
3 years ago
I agree but since a tech has been out here I'm just beginning to get frustrated with the whole situation. Everything they said was fine and I've been through multiple modems.
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EG
Expert
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110.4K Messages
3 years ago
Premises techs don't check the neighborhood lines / infrastructure. And sometimes it takes two or even three visits by them before they actually escalate it up.
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