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LAN speed down to 90Mbps

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New Poster

LAN speed down to 90Mbps

I always have to reset my LAN connection in order to get max speed. It keeps dropping down to 90Mbps. Anyone else having this problem or know why it's happening?
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Expert

Re: LAN speed down to 90Mbps

Start with the modem's signal stats. Perhaps they already are, or they are close to being out of spec and intermittently they go completely of spec. Try getting them here http://192.168.100.1 or here http://10.0.0.1

Please post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.

What is the exact make and model number of the modem ?

Is this a WiFi connection ?



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New Poster

Re: LAN speed down to 90Mbps

Thanks for the reply. There are a bunch of downstream and upstream indices. The downstream power levels range from -5.9 to -8.5 dBmV and the upstream levels from 44 to 47 dBmV. The SNR ranges from 38.5 to 40.0 dB.
It is a wired connection.
Thanks.
New Poster

Re: LAN speed down to 90Mbps

The make and model number are Technicolor and CGM4140COM
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Expert

Re: LAN speed down to 90Mbps

The downstream power is on the low / weak side and it may be intermittently fluctuating even lower to out of spec levels. The upstream power is a bit on the high side as well. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, 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.



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New Poster

Re: LAN speed down to 90Mbps

Thank you very much for the detailed information. I believe there are some splitters in line. I will check on them. Thanks again!