| |
Re: [Connectivity] SBG6580 Intermittent Disconnects Access Denied issue or not?Going to use my internet without a splitter today to see how much of a difference there is. It does seem to be the issue. Called Comcast Support to speak about it and the rep told me they advise not to use a splitter at home. Said I should pay $50 to get a new cable jack installed. Same cost to have a technician look at the jack. Need to decide what I want to do. Will keep the post updated. |
|
rody_44
Premium Member
join:2004-02-20
Quakertown, PA |
rody_44
Premium Member
2014-Apr-6 4:29 pm
Its always been suggested the modem gets put on its own line. Even the highest quality splitter cant defy the laws of physics. |
|
 NetFixerFrom My Cold Dead Hands
Premium Member
join:2004-06-24
The Boro
Pace 5268AC
TRENDnet TEW-829DRU
|
NetFixer
Premium Member
2014-Apr-6 5:52 pm
said by rody_44:Its always been suggested the modem gets put on its own line. Even the highest quality splitter cant defy the laws of physics. That option is not always available due to local franchise (and/or MDU) policies. My business class HSI account was not allowed to have a separate drop to isolate it from a residential TV account (even a single splitter pushed the upstream power to (and over) the upper limit). That is why I was eventually forced to install my own bidirectional amp in order to keep my upstream power levels under control. |
|
 SunnyRuns from Clowns
join:2001-08-19 |
to rody_44
You guys are the experts but I am left wondering why the splitter works fine here but not for him.
Cable comes to the house. Split two ways first. One split goes to three different cables which go to three different bedrooms, two for TV if wanted and one for the CDV modem. The other from the first two way split goes all the way around the house to the other side to a jack in the rec room. Another split there, one side to the TV, the other to my HSI modem.
My signals are about as perfect as one can get. |
|
NetFixerFrom My Cold Dead Hands
Premium Member
join:2004-06-24
The Boro Netgear CM500
Pace 5268AC
TRENDnet TEW-829DRU
|
NetFixer
Premium Member
2014-Apr-6 9:15 pm
said by Sunny:You guys are the experts but I am left wondering why the splitter works fine here but not for him...
My signals are about as perfect as one can get. The difference would be that your signals at the demarc are better than the OP's signals. I seem to recall you mentioning that you are/were an IT admin; surely you are familiar with the famous IT algorithm "garbage in == garbage out". My situation with regard to signal levels was very similar to the OP's situation. At ~60° F my upstream power levels on all channels was usually ~51dBmv with a single splitter (required if I want to be able to use the Comcast TV service) between the modem and the demarc. And when the temperature rose much above ~60° F, I would get random reboots. I had to install my own bidirectional amp in order to compensate for Comcast's signal levels (because Comcast just said too bad...live with it). |
|
| |
Switched around modem and TV on splitter |
It did stay stable off the splitter. Last night I wanted to watch TV, so I put the splitter back in place. However, I switched the modem and TV around on the two OUT connections of the splitter. Above is an screenshot of my upstream levels while on the splitter, simply moved to the other side. Maybe the one side is going bad? I do have plans to pick up new coaxial cable and splitter later today from Comcast in case it starts acting up again. |
|
| |
Are you sure it's a normal splitter, and not a tap? A tap will have one leg with a higher loss, and the other lower. |
|
| |
Splitter being used currently. Moved the modem to the left side for better upstream power levels. |
said by andyross:Are you sure it's a normal splitter, and not a tap? Yup, it is a splitter. It is actually a good quality one that I've been using for months. Both sides state a -3.5dB. |
|
NetFixerFrom My Cold Dead Hands
Premium Member
join:2004-06-24
The Boro Netgear CM500
Pace 5268AC
TRENDnet TEW-829DRU
|
to xdotmatt
said by xdotmatt:I switched the modem and TV around on the two OUT connections of the splitter. Above is an screenshot of my upstream levels while on the splitter, simply moved to the other side. Maybe the one side is going bad?
I do have plans to pick up new coaxial cable and splitter later today from Comcast in case it starts acting up again. Either that or you may have a flaky coax cable/connector, and this time you just got a better connection. If the high upstream power symptom returns after you replace the splitter, I would suggest a new coax cable to the modem might be the next thing to try (if you have not already done that). |
|
| |
I went to Comcast and picked up all new coaxial cables and splitter. I even got a 6ft coaxial cable for the modem since it was on a longer piece that was not necessary. Sadly, still bad connections with everything replaced. They did schedule a technician to come out though tomorrow to test the line. Will keep everyone updated on the issue and thank you to all those who contributed.
NetFixer - as a fellow IT person, I can say this may be the case of GIGO. All tests are pointing to it so we'll find out tomorrow. |
|
rody_44
Premium Member
join:2004-02-20
Quakertown, PA |
to NetFixer
A seperate line is not a seperate drop. I was talking about a homerun. Im assuming his splitter is in the room. |
|
NetFixerFrom My Cold Dead Hands
Premium Member
join:2004-06-24
The Boro Netgear CM500
Pace 5268AC
TRENDnet TEW-829DRU
|
NetFixer
Premium Member
2014-Apr-7 11:34 pm
said by rody_44:A seperate line is not a seperate drop. I was talking about a homerun. Im assuming his splitter is in the room. What would be the point of doing that? The OP would still have the 3.5db attenuation of the splitter in the path, and would still have ~51dBmv (and presumable higher when the temperature rises) upstream power levels. |
|
| |
to xdotmatt
FWIW the splitter you have pictured, we had a fair amount of those that were junk right out of the bag. Normally I might find a bad splitter out my stock once in a great while. Those ones we were finding every couple of days. |
|
