Basic Internet Connectivity And Modem Help

[xiaofeichang]

Thanks! I've been using a wire to connect my laptop directly to modem since the disconnection problem. What does it mean when the downstream signal is tooo high?

[Ktuntied2]

Thank you for your post, thanks to you I have now bought  an ubee ddm3513 and all problems are gone.

[i-am-nerdburg]

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xiaofeichang wrote:

Thanks! I've been using a wire to connect my laptop directly to modem since the disconnection problem. What does it mean when the downstream signal is tooo high?

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It means the the signal is strong and your modem won't work properly. Your signal is extremely high, which is why I asked if you had an amplifier in your house.

[ppinternet]

Nerdburg,

Any update, or the solution still remains to replace the Modem.

Frustrated till the limit with this disconnection problem.

Checked the modem the firmware still shows "Jan 31 15:34:06 2012", so no rollback or update happend yet.

thanks.

[xiaofeichang]

Thanks, Nerdburg! I don't think i have an amplifier at home, at least I am not told so. So probably I should talk to Comcast to reduce the signal level? and a silly questioin.... is the signal some type of radiation that's harmful for humanbody?

[evil_hero]

I have a feeling those of us that have bought the dpc3008 should start looking for a new modem, and those that rent should be calling up comcast to get a replacement NON-dpc3008.

Look at the sbg6580 the first report of the constant drops was Dec 2011, and they still haven't fixed it yet.

Most frustrating part is trying to find an 8x4 channel modem that actually works.....

The only one I have found that could be a decent replacement is the Arris WBM760A. So I guess it's time to sale my sbg6580(firmware issue) and my dpc3008(firmware issue) can't get the sb6121, cause that one is having issues, so I guess that leaves the Arris.....for now.

[EG]

The Zoom 5341J is a wonderful 8x4 straight cable modem !!! No CC compatibilty/firmware issues that I have seen. I've been using one for about five months now and it's been reliable, high performance, and bulletproof. At this point I can say that it is probably the best modem I've ever had and I have had many !

[i-am-nerdburg]

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xiaofeichang wrote:

Thanks, Nerdburg! I don't think i have an amplifier at home, at least I am not told so. So probably I should talk to Comcast to reduce the signal level? and a silly questioin.... is the signal some type of radiation that's harmful for humanbody?

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Yes, you should give Comcast a call.

Cable is radio (RF), so no health worries.

[evil_hero]

Thanks EG, I will look into it.

[xiaofeichang]

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i-am-nerdburg wrote:

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xiaofeichang wrote:

Thanks, Nerdburg! I don't think i have an amplifier at home, at least I am not told so. So probably I should talk to Comcast to reduce the signal level? and a silly questioin.... is the signal some type of radiation that's harmful for humanbody?

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Yes, you should give Comcast a call.

Cable is radio (RF), so no health worries.

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Great! Thanks again, Nerfburg.

[ryousuf1]

About  

Model: Cisco DPC3008 Vendor: Cisco Hardware Revision: 1.0   MAC Address: a4:a2:4a:24:82:f6 Bootloader Revision: 2.3.1_R3 Current Software Revision: d3000-v302r125532-120131a-L2VPN-CMCST Firmware Name: d3000-v302r125532-120131a-L2VPN-CMCST.bin Firmware Build Time: Jan 31 15:34:06 2012 Cable Modem Status: Operational Wireless Network:  

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Cable Modem State       DOCSIS Downstream Scanning: Completed DOCSIS Ranging: Completed DOCSIS DHCP: Completed DOCSIS TFTP: Completed DOCSIS Data Reg Complete: Completed DOCSIS Privacy: Enabled    

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Downstream Channels         Power Level: Signal to Noise Ratio: Channel 1 : -1.6 dBmV 39.9 dB Channel 2 : -1.1 dBmV 39.9 dB Channel 3 : -0.6 dBmV 40.1 dB Channel 4 : -0.5 dBmV 40.1 dB Channel 5 : -0.1 dBmV 39.9 dB Channel 6 : -0.1 dBmV 39.9 dB Channel 7 : -0.4 dBmV 40.1 dB Channel 8 : 0.0 dBmV 0.0 dB    

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Upstream Channels         Power Level: Channel 1 : 50.8 dBmV Channel 2 : 0.0 dBmV Channel 3 : 0.0 dBmV Channel 4 : 0.0 dBmV

[Jim721]

EG is right I have had the Zoom 5341J for about 2 months now and it is rock solid I have owned many many modems over the years and this one is the best I ever had. And with 8 downstream channels and 4 upstream you just cant go wrong with the Zoom 5341J.

[JJ81]

Wow, I cant believe it took me so long to find this forum listing. I am too experiencing the same issue, though mine occurs more frequently whilc logg into my job's VPN. I work from home, I can log into the vpn no prob but when I take a call for tech support I can get about 30-2 mins of talk time and the modem reset. 

I have had out 2 tech and 2 bucket trucks, just got off the phone w/ a super. They are gonna try pushing out a rep sooner then 3-5 tomorrow sd I will get a call tonight.

Model: 	Cisco DPC3008
Vendor: 	Cisco
Hardware Revision: 	1.0
Serial Number:	
MAC Address: 	
Bootloader Revision: 	2.3.1_R3
Current Software Revision: 	d3000-v302r125532-120131a-L2VPN-CMCST
Firmware Name: 	d3000-v302r125532-120131a-L2VPN-CMCST.bin
Firmware Build Time: 	Jan 31 15:34:06 2012
Cable Modem Status: 	Operational
Wireless Network: 	
  	Cisco Logo
  		
Cable Modem State 	 
		
DOCSIS Downstream Scanning: 	Completed
DOCSIS Ranging: 	Completed
DOCSIS DHCP: 	Completed
DOCSIS TFTP: 	Completed
DOCSIS Data Reg Complete: 	Completed
DOCSIS Privacy: 	Enabled
  		
Downstream Channels 	 
		
  	Power Level: 	Signal to Noise Ratio:
Channel 1: 	1.2 dBmV 	40.5 dB
Channel 2: 	1.6 dBmV 	40.7 dB
Channel 3: 	2.2 dBmV 	40.9 dB
Channel 4: 	2.6 dBmV 	41.0 dB
Channel 5: 	2.8 dBmV 	41.0 dB
Channel 6: 	2.7 dBmV 	40.7 dB
Channel 7: 	2.3 dBmV 	41.2 dB
Channel 8: 	2.2 dBmV 	40.9 dB
  		
Upstream Channels 	 
		
  	Power Level:
Channel 1: 	50.5 dBmV
Channel 2: 	0.0 dBmV
Channel 3: 	0.0 dBmV
Channel 4: 	0.0 dBmV

[terrim1216]

I had the tech out yesterday. He replaced an old cable and cleaned up some corrusion on the out side. Everything was better, but today during a skype meeting I kept getting dropped. And now with my son also online (although he is on the other band of my dual band router) we keep losing the connection. I would definitely say it's a comcast problem. I got the Cisco dpc3008 router a few weeks ago and everything was fine up until the end of last week. Comcast is full of it if they are saying it's not something on their end. Whatever they did they should revert back to the way it was before, because this is not working for anyone.

[Gandos]

I'm having the exact same problem with the exact same problem.  This started occuring around the 10th of April or so.  I'm using the DPC3008 as everyone else.

Model: Cisco DPC3008 Firmware Build Time: Jan 31 15:34:06 2012

I've called comcast about 6 or 7 times now and they give all the preconditioned responses.

Does anyone know if they will push firmware back on individual modems if you call in? 

I'm fed up with calling.  I've had every line replaced in my house.  Had the pole checked.  I've even went to the store to change modems.  They gave me the exact same model... "DoH..."  I didn't see this post when I went to comcast. 

[Jim721]

After hearing all these problems with this modem and CC not really helping I have to wonder Y you all dont just dump this modem for somthing that is a proven performer.Get rid of the junk and buy a modem that workes. If you cant afford to buy your own and the service centers dont have a different one simply call CC and they will mail you another one request that u want somthing different from the DPC3008 make sure it is a D3 modem. If that dont work then dump CC and go with another ISP honestly how long do you wanna keep stressing over this to many other things in life are more important. Just my opinion this thread should be closed we do not work for CC and there is nothing more we can do about this issue. Good Luck !! Jim.

[EG]

It's not really that these modems are "junk". It appears that it may be a firmware load compatibility issue with it and certain CC systems / brands of CMTS's that they use firmware loads. I will have to disagree with this thread being locked so soon.

[Jim721]

I respect your opinion EG but what more can be solved by this thread ? This is a CC issue and until they find a fix there will be no resolution to this problem just more posts of angry customers. I would agree that if and when this issue is solved there should be another thread opened to post that CC has corrected the problem. Always good to talk with you. Jim Detroit, MI  

[EG]

It is potentially important data and feedback for CC employees who may read it..

[Jim721]

I wish we had more CC employees lurking around here but they seem few and far between.  Jim !!

[Gandos]

The modem is not junk.  It's the fact that I'm renting the modem from comcast.  There is obviously some sort of contract between Cisco and Comcast for these modems. 

Comcast uses their modems and cisco supplies comcast with good firmware updates.  If Cisco can't uphold their end of the bargain then comcast needs to dump them. 

The customers should not be suffering for comcast's problems.

It's like ordering a pizza from Domino's.  You recieve the pizza with rotten pepperoni's.  Domino's says, "Look it's not our fault our pepperoni's are bad, blame our supplier.  Deal with it, it's on your pizza and you paid for it."

[EG]

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Jim721 wrote:

I wish we had more CC employees lurking around here but they seem few and far between.  Jim !!

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You never know who is reading here.

[Jim721]

Im my opinion if CC offers a product that is clearly for whatever reason does not function properly and after complaint after complaint they seem to have no fix then to me its junk and i would move on with somthing else.

    BTW: I liked your story about the pizza..                Jim !!

[EG]

O/k. You can have the "last word".... This time that is !!!

[JJ81]

After making my way through the wall of employees who wouldnt get a super on the phone I finally talked to one who is "alerting maint. and seeing if this can be pushed down the pipeline" he is having a tech super come out w/ a new modem of dirrerent make, he was able to bump my work schedule up to 10-12 which is great being that its +1 hr b4 the start of my shift. Ill update after all is said and done w/ the modem switch

JJ

[Jim721]

I wish you the best of luck JJ81. 

[ryousuf1]

GOOD NEWS

My Cisco DPC3008 just got refreshed again but good news is that now I see Comcast reverted to the following: 

Firmware Build Time: Aug 11 11:30:58 2011

Hopefully no more issues of dropping connections..  Everyone please check http://192.168.100.1/

[robertjw]

Just checked mine, it is also on the Aug 11 firmware.

[pubdef]

Yes, August firmware it is!

[i-am-nerdburg]

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ryousuf1 wrote:

GOOD NEWS

My Cisco DPC3008 just got refreshed again but good news is that now I see Comcast reverted to the following: 

Firmware Build Time: Aug 11 11:30:58 2011

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Interesting....

[hsostock]

I can confirm that the same just happened to me, I had another restart and it reverted to the August 11 firmware.

[Gandos]

Reverted firmware fixed my issues.

[aptos100]

Hopefully you can get a tech out soon. 16-18 dBmv on the Downstream ins insanely high.

[OscarZ]

I just powercycled my modem and it now also has the reverted firmware date. I'm going to go give it a try with some online gaming and see if the disconnection problems have now gone away... *fingers crossed*

[outlier]

My Cisco DPC3008 also received a new firmware push this evening and now shows the Aug '11 build.

So far, 45-minutes w/o a dropped connection... a new record!!!

Let's hope it holds up... And to look on the bright side, better late than never?

[KYL]

Firmware was rolled back this afternoon 3pm PST. All imaging servers are set to flash any DPC3008 back to the original August firmware.

[evil_hero]

*foot in mouth*

Power cycled the modem....and praise the holy modem!!!

Current Software Revision:

d3000-v302r125532-110811a-L2VPN-CMCST

Firmware Name:

d3000-v302r125532-110811a-L2VPN-CMCST.bin

Firmware Build Time:

Aug 11 11:30:58 2011

Cable Modem Status:

Operational

Thank you Comcast! *fingers crossed this solves the issue*  I've been on a skype call and streaming netflix since the modem received the new firmware, and not a drop.......*knock on wood*

[OscarZ]

I was able to use netflix and do some online gaming for over 1.5 hours without a single drop (compared to a drop every 10 minutes before) so for now it looks like the rolled back firmware did the trick. 

[JJ81]

Tech came out, tested everything sd that it looked good. He went down the street to see what other people are seeing. Swapped out modems and now Im seeing improved speeds aswell

http://speedtest.net/result/1901598554.png

compared to

http://speedtest.net/result/1899995581.png

w/ the cisco

[dansob]

Let's see after firmware roll-back, I can deal with 1 disconnect a day but not several. Still testing...

I'm willing to actually buy: Modem from best buy: Motorola - SURFboard DOCSIS 3.0 High-Speed Cable Modem - And stop renting faulty modem from comcast.

[JJ81]

Full day @ work no disconnects w/ the different modem YAY!!

[evil_hero]

Aug firmware, just got a drop playing games

Downstream Channels
Power Level: Signal to Noise Ratio:
Channel 1: -8.9 dBmV 38.7 dB
Channel 2: -9.5 dBmV 38.6 dB
Channel 3: -8.1 dBmV 39.0 dB
Channel 4: -10.0 dBmV 37.9 dB
Channel 5: -10.3 dBmV 37.5 dB
Channel 6: -8.5 dBmV 39.1 dB
Channel 7: -10.7 dBmV 38.0 dB
Channel 8: 0.0 dBmV 0.0 dB

Upstream Channels
Power Level:
Channel 1: 50.3 dBmV
Channel 2: 50.8 dBmV
Channel 3: 0.0 dBmV
Channel 4: 0.0 dBmV

[evil_hero]

Another drop

Downstream Channels
 Power Level: Signal to Noise Ratio:
Channel 1: -9.4 dBmV 38.6 dB
Channel 2: -8.4 dBmV 39.2 dB
Channel 3: -10.2 dBmV 37.9 dB
Channel 4: -10.2 dBmV 37.5 dB
Channel 5: -8.3 dBmV 39.3 dB
Channel 6: -10.2 dBmV 37.9 dB
Channel 7: -9.1 dBmV 38.3 dB
Channel 8: 0.0 dBmV 0.0 dB

Upstream Channels

Power Level:
Channel 1: 50.0 dBmV
Channel 2: 50.5 dBmV
Channel 3: 0.0 dBmV
Channel 4: 0.0 dBmV

[evil_hero]

My guess is my upstream power levels are too high. Thoughts? Do I just need to call comcast? what do I need to tell them?

[EG]

Both of the power levels are borderline to being out of spec and they may be fluctuating farther. Are there any excess / unneeded splitters that can be eliminated. I think that some if the issues in this thread may be doubleheaders in nature.

[terrim1216]

Mine has also reverted back to Aug 2011. Looks like we got their attention. And I did not drop on my skype meeting today. My son also had no issues with xbox last night. All seems better today. Yay!!!

[mtbbum]

I'll also confirm that mine has been reverted back to the Aug 2011 firmware and stability has once again returned to an acceptable level. :-) 

[evil_hero]

EG

I have one 4 port splitter in the back of my house, but the tech said when he came out that he thinks there is another splitter in the walls somewhere. I will try running a direct line off the splitter in the back. 

I think you are right, not all drops in this thread are from the modem. 

Thanks for your help

[EG]

Good luck ! Please let us know how things turn out.

[pmurtaugh]

Is there a way to force the firmware reflash? A call to Comcast? I actually just got Comcast installed this morning and everything was fine until I started to play some games, same as everyone else. My numbers look the same as well, I just have the January firmware.

Model: Cisco DPC3008 Vendor:

Cisco Hardware Revision: 1.0  

MAC Address: 18:59:33:50:45:74

Bootloader Revision: 2.3.1_R3

Current Software Revision: d3000-v302r125532-120131a-L2VPN-CMCST

Firmware Name: d3000-v302r125532-120131a-L2VPN-CMCST.bin

Firmware Build Time: Jan 31 15:34:06 2012

Cable Modem Statusperational

Wireless Network:       

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Cable Modem State      

DOCSIS Downstream Scanning: Completed

DOCSIS Ranging: Completed

DOCSIS DHCP: Completed

DOCSIS TFTP: Completed

DOCSIS Data Reg Complete: Completed

DOCSIS Privacy: Enabled

   

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Downstream Channels        

Power Level: Signal to Noise Ratio:

Channel 1: 7.9 dBmV 39.8 dB

Channel 2: 7.8 dBmV 39.6 dB

Channel 3: 8.7 dBmV 39.7 dB

Channel 4: 8.9 dBmV 39.6 dB

Channel 5: 8.9 dBmV 39.8 dB

Channel 6: 0.0 dBmV 0.0 dB

Channel 7: 0.0 dBmV 0.0 dB

Channel 8: 0.0 dBmV 0.0 dB    

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Upstream Channels         Power Level:

Channel 1: 43.8 dBmV

Channel 2: 0.0 dBmV

Channel 3: 0.0 dBmV

Channel 4: 0.0 dBmV