cmjstota
Premium
join:2003-02-27
Warner Robins, GA
1 edit | Rediculous Speeds, Simply Rediculous. HELP!!!
Is there any COX techs out there that can help me get this problem looked at? The local people I IM (PapaSmurf hasn't been on in 6 days, and MGA_SOC is not looking at their messages or something) aren't around. For this entire week I've seen the worst download speeds in the evening hours ever....Boost has been around for a bit now and it was working great but now this is simply rediculous, it feels like I'm being throttled because around 1am EST my speeds are up siginificantly close to where they are supposed to be....
Look at these tests from 8:30 and 10:00 tonight.....it's sad, really sad:
8:30pm
»members.cox.net/christopher.john···_FTP.JPG
»members.cox.net/christopher.john···0TAM.JPG
»members.cox.net/christopher.john···0ATL.JPG
10pm
»members.cox.net/christopher.john···FTP2.JPG
»members.cox.net/christopher.john···TAM2.JPG
I'll post again if I am up at 1am to show the difference.
*edit* Can a Mod or something add the [GA] tag? In my haste I forgot to. This is from Middle Georgia. |
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Gamer
join:2006-12-09
Phoenix, AZ
| While it's most likely something has become overloaded, could you check your signal levels [if available] and post them as well: »192.168.100.1
I would recommend PMing CoxTOC1  at this time (General residential). CoxTech1 is currently on vacation.
I don't believe I've ever seen MGA_SOC, Smurf doesn't make too many appearences. |
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cmjstota
Premium
join:2003-02-27
Warner Robins, GA
1 edit | My levels are high ,at least the downstream anyways, but it's been that high for months now with no problems and in a couple hours it will be the same and my speeds will be back to normalish. PapaSmurf told me to IM MGA_SOC when I have problems they are strictly in the Middle Georgia area and it shows them logging in every day but not reading their IM's.
Downstream Value
Frequency 699000000 Hz
Signal to Noise Ratio 35 dB
QAM QAM256
Network Access Control Object ON
Power Level 14 dBmV
The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading
Upstream Value
Channel ID 2
Frequency 23696000 Hz
Ranging Service ID 353
Symbol Rate 2.560 Msym/s
Power Level 44 dBmV |
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cmjstota
Premium
join:2003-02-27
Warner Robins, GA
| Ok look at this right after MIDNIGHT look at this:
»members.cox.net/christopher.john···_FTP.JPG
»members.cox.net/christopher.john···0ATL.JPG
WTF....it's like its throttled until midnight. |
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m8trix
join:2003-12-24
Phoenix, AZ
 ·Cox HSI
| reply to cmjstota
correct me if im wrong but your downstream power level is weak and maybe the cause,do these levels stay the same when you connection is fine.
i feel you pain im running into the same issues,between 830pm and 1030pm my down load goes to 900kbs and uplaod is 1mb yet my levels are pefrect and no drops or packet loss,i have just been waiting for the data engineers to find something |
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cmjstota
Premium
join:2003-02-27
Warner Robins, GA
2 edits | Actually my downstream is high at +14dbmv it used to be right at 0 which is ideal but it's always like that even now when my speeds are back to normal.
Hmm just a thought but my modem logs have my modem changing channels from 2 to 1 at 11pm, Could that be the problem that Channel 2 is FUBAR? Never heard anything of the sorts but it wouldn't suprise me. |
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m8trix
join:2003-12-24
Phoenix, AZ | reply to cmjstota
well first thing a tech is most likely want to do is improve the signal strength on the downstream,this could be a bad splitter or to many splits |
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darkwish
Free Knight
Premium
join:2003-09-12
Virginia Beach, VA
| said by m8trix :well first thing a tech is most likely want to do is improve the signal strength on the downstream,this could be a bad splitter or to many splits His downstream is already very high. Any higher and his modem will not be able to sync. |
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cableguy619
join:2003-06-24
Chula Vista, CA | reply to cmjstota
Yeah someone isnt reading :P, You are pretty hot on your rx at 14. Are you running a inline amp? If so remove it. |
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Gamer
join:2006-12-09
Phoenix, AZ
| reply to m8trix
said by m8trix :well first thing a tech is most likely want to do is improve the signal strength on the downstream,this could be a bad splitter or to many splits It doesn't need to be improved, +15dBmV is a level near 40 times stronger than necessary. While this is nearing too strong, there's really no need to attenuate it.
Modems work fine directly off the tap with signal levels around +15-20 dBmV DSPwr, +25-35 dBmV USPwr. |
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m8trix
join:2003-12-24
Phoenix, AZ
·Cox HSI
| reply to cmjstota
dont you want to be as close to zero as possible whether you are on the positive or negative side.hes at +14 putting him at the outter edge of where you want to be...
Downstream Received Power: the DOCSIS specification requires cable modems to function correctly with downstream power levels in the range -15 dBmV to +15 dBmV: power readings at or close to those extremes are likely to be unacceptable.Generally, power level should be between -5db and +5db for best performace |
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Gamer
join:2006-12-09
Phoenix, AZ
2 edits | said by m8trix :dont you want to be as close to zero as possible whether you are on the positive or negative side.hes at +14 putting him at the outter edge of where you want to be... Downstream Received Power: the DOCSIS specification requires cable modems to function correctly with downstream power levels in the range -15 dBmV to +15 dBmV: power readings at or close to those extremes are likely to be unacceptable.Generally, power level should be between -5db and +5db for best performace If your modem only has a tolerance of +/-5 dB, replace it.
The generally accepted value for DSPwr is 0 dBmV +/- 10 dB, while USPwr is ideal at 40 dBmV , +/- 10 dB.
As it stands, the Moto's handle an overly strong signal very well (The original post looks like a SB5120). It's not uncommon for Cox to test a line with a Moto directly at the tap, without attenuating the signal, and have significantly stronger signal levels than that without consequence.
I will agree that if there is a line amp on the premises causing the signal to be at those levels, it should be removed. Futhermore, if the modem loses sync during the periods of slow connectivity or there is a substansial increase in the power level during these periods, that would indicate a signal problem. |
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cmjstota
Premium
join:2003-02-27
Warner Robins, GA
| The power level is consistant during the day and night when its bad and good the levels are the same. I do have a Motorola SB5120 also. There is no inline amplifier in place and I have 2 splitters one when the signal comes into the house to go to 2 different rooms and the other in my room with it going to the Cable and Modem. |
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TheFoX210
join:2007-06-21
Phoenix, AZ
1 edit | reply to Gamer
. |
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CoxTOC1
join:2007-05-15
Newport News, VA | Actually TheFoX210 you are incorrect on your signal levels.
SNR is 35db and above
Tx is 35 to 52 dBmV
Rx is -15 to 15 dBmV
Are the current acceptable signal levels. |
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TheFoX210
join:2007-06-21
Phoenix, AZ
1 edit | . |
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Gamer
join:2006-12-09
Phoenix, AZ
1 edit | I'll take a modem with a TX of 35dBmV over 50dBmV in Phoenix any day. The contractors keep aiming for 50dBmV in the winter, then the minute summer hits people seem to drop like flies with TX levels of 55dBmV+.
Given that the 'solution' to a modem with a TX power of less than 35dBmV is to get it to 40+dBmV with an attenuator, why not just let the modem, which is perfectly capable of doing so, transmit at 35dBmV if the CMTS tells it to? |
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TheFoX210
join:2007-06-21
Phoenix, AZ | That I can't answer since I'm not a field tech. I agree that when the summer hits levels will change like that. There's work being done to the system to hopefully correct that issue through the use of automatic gain controllers. |
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vraeden
join:2007-06-21
Gainesville, FL | I have the Exact Same problem. Fine around 8am, terrible all evening into the early morning. In Florida. Was better at old apartment, just moved. |
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vraeden
join:2007-06-21
Gainesville, FL | Wanted to add, I spoke to a tech on the phone and he said my modem had a perfect signal, but wouldn't admit that the low speeds is a real problem. |
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