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Forum Discussion
Daily short outages with CBR750 and Comcast
I have a CBR750 in a mesh setup so I can work remotely. Starting last week, the System would lose cable connection for a minute or two. Sometime I had to reboot modem. Would always come back. Also, tried direct ethernet connection to modem and still no connection.
Called Comcast and they said they detected a line issue and they came out and said they detected noise at the pole and replaced something. Issues seemed mostly better but yesterday the same issues arose.
Called comcast again they sent some signals to modem. Now working but worried it will startup again. Seems most prevalent between 11 am and 2 pm.
Also, any settings I should add/change to my setup?
I have a CBR750 and 4 sats (large old two story house, Modem in downstairs kitchen, have two sats downstairs and two upstairs).
4 Replies
What Firmware version is currently loaded?
What speed tier packages do you pay for for the UP and DOWN?
What channels are you using?
Any Wifi Neighbors near by? If so, how many?Please post a copy and paste of the modems connection status and event log page.
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-modem-modem-router
https://kb.netgear.com/30008/How-do-I-view-or-clear-the-event-logs-on-my-NETGEAR-cable-modem-or-modem-routerHave the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box.
Be sure your using good quality RG6 coax cable up to the modem.
Start with removing any amplifiers, signal attenuators, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.htmlV4.6.14.4_2.3.12
Comcast 900 mb
Startup Procedure Procedure Status Comment Acquire Downstream Channel 507000000 Hz Locked Connectivity State Ok Operational Boot State Ok Operational Security Enabled BPI+ IP Provisioning Mode Honor MDD honorMdd(4) Cable ConnectionCANCEL APPLY Cable Diagnostic Status: Poor Action:
[Downstream Power Level]
Try these actions (Click the Refresh button after each step):
1) Make sure the coaxial cable is tightly connected.
2) Remove any unnecessary splitters.
3) Replace any required splitters.
4) Contact your service provider for troubleshooting help.Internet Access: Downstream Status: Upstream Status: Refresh Save Cable Diagnostic Info Advanced Information Frequency Start Value This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect. Starting Frequency Startup Procedure Procedure Status Comment Acquire Downstream Channel 507000000 Hz Locked Connectivity State Ok Operational Boot State Ok Operational Security Enabled BPI+ IP Provisioning Mode Honor MDD honorMdd(4) Please include all the bottom portion of the connection status page.
