Comcast connection problems.

Posts: 21 · Vonage Forum Associate Joined: Jul 04, 2005 Posts: 21

OK, here is the deal
For the past 2 weeks my comcast cable internet connection has been HORRIBLE. My connection has been up and down. One minute I can connect with no problems at all and the next minute it is slow as mollasses. They sent a tech out last weekend and he replaced the line from the street to my house and I was still having the same problem. He suggested my cable modem was bad so I went out and dropped $85 on a brand new one and I am still having the same problem. I called up tech support again today and they told me connection with my modem is fine and they could send another tech out if I like Mad

I have no idea what is wrong with my connection. It is driving me NUTS!!! I have been with Comcast for over 5 years now and have not encountered any problems that my-self or Comcast could not fix. Needless to say when Comcast goes down my phone line goes down as well. As soon as my number was ported and I dropped bell south is when I started having problems....Any help/suggestions would be greatly appreciated. Here are some more details about my set-up

Modem: Motorola SB5120 (Brand new)
Router: Linksys BEFSR81
Vonage phone adapter: Linksys PAP2
3 Computers behind the router.

If I by-pass the router and run straight to my comp I still have connection problems.

Any ideas guys??

Posts: 3198 · Posted: Fri Sep 02, 2005 5:58 pm Post subject:

go to 192.168.100.1, click signal and paste the values.

Posts: 164 · Posted: Fri Sep 02, 2005 6:08 pm Post subject: Re: Comcast connection problems.

JCB wrote:

OK, here is the deal
For the past 2 weeks my comcast cable internet connection has been HORRIBLE. My connection has been up and down. One minute I can connect with no problems at all and the next minute it is slow as mollasses. They sent a tech out last weekend and he replaced the line from the street to my house and I was still having the same problem.
xxxx
Modem: Motorola SB5120 (Brand new)
Router: Linksys BEFSR81
Vonage phone adapter: Linksys PAP2
3 Computers behind the router.

If I by-pass the router and run straight to my comp I still have connection problems.

Any ideas guys??

That sounds similar to my recent problem. Did the installer run a new line *inside* the house? You need the first split on the line for a decent signal. The installer tested the signal outside the house, did he note a signal drop when tested at the cable modem? Some apartment houses develop real cable snarls over the years. Each splitter will degrade the signal to the point of uselessness.

My problem was simple. New install through the wall to the incoming cable line. I get a clean signal, and everybody else gets their TV. There was nothing wrong with the system, other than cable connections inside the house.

Posts: 21 · Vonage Forum Associate Joined: Jul 04, 2005 Posts: 21

reebok wrote:

go to 192.168.100.1, click signal and paste the values.

Frequency 687000000 Hz
Signal to Noise Ratio 35 dB
QAM 256
Network Access Control Object ON
Power Level -8 dBmV
The Downstream Power Level reading is a snapshot taken at the time this page was requested.

Upstream Value
Channel ID 1
Frequency 30992000 Hz
Ranging Service ID 774
Symbol Rate 2.560 Msym/s
Power Level 33 dBmV

Posts: 21 · Vonage Forum Associate Joined: Jul 04, 2005 Posts: 21

Quote:

That sounds similar to my recent problem. Did the installer run a new line *inside* the house? You need the first split on the line for a decent signal. The installer tested the signal outside the house, did he note a signal drop when tested at the cable modem? Some apartment houses develop real cable snarls over the years. Each splitter will degrade the signal to the point of uselessness.

My problem was simple. New install through the wall to the incoming cable line. I get a clean signal, and everybody else gets their TV. There was nothing wrong with the system, other than cable connections inside the house.

He came inside and tested the line on the inside. The line from the street is going through a 4-way splitter then to a 2-way splitter then to the modem. The tech replaced the 2-way and did not make any mention of it being a possible problem

Posts: 69 · Full Forum Member Joined: Aug 21, 2005 Posts: 69

Have you considered switching to another server to see what happens? Wink

Posts: 9 · New Forum Member Joined: Aug 19, 2005 Posts: 9

I had the same problem where the cable modem was up and running fine, sometimes for minutes and sometimes for hours but then would degrade and lose signal. Pepperoni touched on the solution that cured my problem. The cable tech came out and took signal Lvl measurements outside and then compared them to measurements taken on the cable inside as it goes into the modem and found a significant degrade of the signal. It turned out to be a generic Radio Shack splitter causing the problem. he replaced it and I haven't had any more problems and that was about 6 months ago.

Posts: 21 · Vonage Forum Associate Joined: Jul 04, 2005 Posts: 21

WIRED wrote:

I had the same problem where the cable modem was up and running fine, sometimes for minutes and sometimes for hours but then would degrade and lose signal. Pepperoni touched on the solution that cured my problem. The cable tech came out and took signal Lvl measurements outside and then compared them to measurements taken on the cable inside as it goes into the modem and found a significant degrade of the signal. It turned out to be a generic Radio Shack splitter causing the problem. he replaced it and I haven't had any more problems and that was about 6 months ago.

Not only did he replace the 2 way splitter going to my TV and modem but he also replaced the 4 way splitter outside. The only other thing I think it could be is that from the 4 way splitter to the 2 way is RG-59 and it should be RG-6 from what I understand. I have another tech coming back out on wednesday Cry

Posts: 5 · New Forum Member Joined: Jan 20, 2005 Posts: 5

When comcast went to 6MB download speed, I was still getting 2.5MB download.

I even connected my modem to the the first split and then ran Cat 5 cable up to the 3rd floor. This did not help.

Comcast tech came out with a spare modem. He put the spare modem in-line and I am not pulling 7 MB download.

The original modem was customer owned. I am now paying $3 a month to the replacement modem.

I would recommend getting as close to the first split as possible.

The only Vonage issue I have is that after 15 minutes the call drops.

Posts: 21 · Vonage Forum Associate Joined: Jul 04, 2005 Posts: 21

joe90 wrote:

When comcast went to 6MB download speed, I was still getting 2.5MB download.

I even connected my modem to the the first split and then ran Cat 5 cable up to the 3rd floor. This did not help.

Comcast tech came out with a spare modem. He put the spare modem in-line and I am not pulling 7 MB download.

The original modem was customer owned. I am now paying $3 a month to the replacement modem.

I would recommend getting as close to the first split as possible.

The only Vonage issue I have is that after 15 minutes the call drops.

Do you mean you are NOW pulling 7 megs?
Earlier today when my connection was fine I was pulling around 7.5 megs/sec download speed. When it works it is great....when it works.