Modem loosing conection. is it caused by internal network, router, VoIP?

Niqd · 11-27-2006, 05:53 AM

Hi, I have SurfBoard 3100 cable modem, Charter Communications, Southern California. D-link 604 Router. VoIP through Sun Rocket. Win XP pro 1 GB ram.

My Cable modem loses the feed several times a day, all the lights go off and then they come back on after a few minutes. I am trying to trouble shoot and see if it is related to my internal network. So I disconected the internal network and connected the computer directly to the cable modem. But since i have to work i can not check the connection every hour.

Is there a log somewhere that tells if/when the cable modem loses the connection and resets?

thanks so much
Nick

**johnwill** · 11-27-2006, 08:11 AM

Well, if all the lights on the cable modem go off, this appears to be an issue either with the modem, the power to the modem, or your ISP. I suggest you start your debugging there.

Niqd · 11-28-2006, 05:26 AM

Thank you,

I did start debugging with my isp provider. They had me disconnect my internal network to see if the problem is there or the modem. But I am not home much to see if the modem loses connection so i was looking for a log or another way to tell if and when the modem resets

thanks

**johnwill** · 11-28-2006, 09:05 AM

Take a look at some of these and see if they'll log disconnections.

http://www.bysoft.com/networkmonitor.php

http://www.freedownloadscenter.com/N...k_Monitor.html

http://www.freedownloadscenter.com/N...g_Console.html

Here's a page that has lots of networking monitoring utilities, perhaps something there might do the job: http://www.freedownloadscenter.com/S...k_monitor.html

Niqd · 11-29-2006, 05:39 AM

Thank you so much I will try these

~Nick

Niqd · 12-13-2006, 05:51 AM

Update:
Charter Com Inc. sent a technician out to troubleshoot my system. He found a coax splitter that he said were causing the problems. He claimed that on the 4 way splitter (I installed from radio shack)the outputs dB are different on the exit ports and that the Internet/modem needed to be on a 7dB port. I had it installed on a 3.5dB port. So far so good!
thanks
Nick

**johnwill** · 12-13-2006, 08:56 AM

He is correct. You should have your modem connected at a 2:1 splitter at the service entrance and low-loss cable like RG-6U in a home-run directly to the modem.

11-27-2006, 05:53 AM	#1 (permalink)
Niqd Network Technician Join Date: Oct 2006 Location: Southern California Posts: 49 OS: XP, W2K, Vista	Modem loosing conection. is it caused by internal network, router, VoIP? Hi, I have SurfBoard 3100 cable modem, Charter Communications, Southern California. D-link 604 Router. VoIP through Sun Rocket. Win XP pro 1 GB ram. My Cable modem loses the feed several times a day, all the lights go off and then they come back on after a few minutes. I am trying to trouble shoot and see if it is related to my internal network. So I disconected the internal network and connected the computer directly to the cable modem. But since i have to work i can not check the connection every hour. Is there a log somewhere that tells if/when the cable modem loses the connection and resets? thanks so much Nick

11-27-2006, 08:11 AM	#2 (permalink)
johnwill Manager, Networking Forums Join Date: Sep 2002 Location: S.E. Pennsylvania, US Posts: 41,874 OS: Windows 7, XP-Pro, Vista, Linux Blog Entries: 1	Well, if all the lights on the cable modem go off, this appears to be an issue either with the modem, the power to the modem, or your ISP. I suggest you start your debugging there. __________________ If TSF has helped you, Tell us about it! or Donate to help keep the site up! Microsoft MVP - Windows Desktop Experience

11-28-2006, 09:05 AM	#4 (permalink)
johnwill Manager, Networking Forums Join Date: Sep 2002 Location: S.E. Pennsylvania, US Posts: 41,874 OS: Windows 7, XP-Pro, Vista, Linux Blog Entries: 1	Take a look at some of these and see if they'll log disconnections. http://www.bysoft.com/networkmonitor.php http://www.freedownloadscenter.com/N...k_Monitor.html http://www.freedownloadscenter.com/N...g_Console.html Here's a page that has lots of networking monitoring utilities, perhaps something there might do the job: http://www.freedownloadscenter.com/S...k_monitor.html __________________ If TSF has helped you, Tell us about it! or Donate to help keep the site up! Microsoft MVP - Windows Desktop Experience

12-13-2006, 08:56 AM	#7 (permalink)
johnwill Manager, Networking Forums Join Date: Sep 2002 Location: S.E. Pennsylvania, US Posts: 41,874 OS: Windows 7, XP-Pro, Vista, Linux Blog Entries: 1	He is correct. You should have your modem connected at a 2:1 splitter at the service entrance and low-loss cable like RG-6U in a home-run directly to the modem. __________________ If TSF has helped you, Tell us about it! or Donate to help keep the site up! Microsoft MVP - Windows Desktop Experience

11-28-2006, 05:26 AM	#3 (permalink)
Niqd Network Technician Join Date: Oct 2006 Location: Southern California Posts: 49 OS: XP, W2K, Vista	Thank you, I did start debugging with my isp provider. They had me disconnect my internal network to see if the problem is there or the modem. But I am not home much to see if the modem loses connection so i was looking for a log or another way to tell if and when the modem resets thanks

11-29-2006, 05:39 AM	#5 (permalink)
Niqd Network Technician Join Date: Oct 2006 Location: Southern California Posts: 49 OS: XP, W2K, Vista	Thank you so much I will try these ~Nick

12-13-2006, 05:51 AM	#6 (permalink)
Niqd Network Technician Join Date: Oct 2006 Location: Southern California Posts: 49 OS: XP, W2K, Vista	Update: Charter Com Inc. sent a technician out to troubleshoot my system. He found a coax splitter that he said were causing the problems. He claimed that on the 4 way splitter (I installed from radio shack)the outputs dB are different on the exit ports and that the Internet/modem needed to be on a 7dB port. I had it installed on a 3.5dB port. So far so good! thanks Nick