akita
@comcast.net
| SB6120 Provisioning problem
I'm currently running an SB4100, which recently has gotten unreliable when hot. I bought an SB6120 from Fry's as a replacement and attempted to get it provisioned by Comcast.
I don't have D3 support in my area yet (Fremont, CA) and just want to use the SB6120 with my current Performance tier service. After 2 long calls and using 2 different SB6120's I still can't get it provisioned. All the lights will eventually come on, but the online light just keeps flashing. Should the online LED be on continuously even when not provisioned properly, as long as it can get a block sync?
I have a Channel Vision powered amplifier inline, but I don't think this is the problem, since my SB4100 was working fine. Signal levels are at -1 dBmV.
Anybody have a similar experience? The last tech I spoke with mumbled something about a "rate code" in the billing dept possibly preventing a succesful provisioning...
Any thoughts before I give up on the SB6120?
Thanks. |
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wanger
join:2008-04-20
Reading, PA | Why not try asking the question here: »/forum/comcastdirect |
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gar187er
Premium Alcoholic
join:2006-06-24
Dover, DE | reply to akita
4100 is old, needed to be changed....
why doi you have the amp? |
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koshoka
join:2006-12-01
Pottsville, PA | reply to akita
what's your upstream level? |
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madden2k5
join:2009-04-09
Portsmouth, VA
 ·Cox HSI
1 edit | First of all you shouldnt be running a inline amp between the connection of your modem. Inline amps are for shitty signal tv's and stuff. Anyways off the main splitter once it hits the house, you should have a direct line running to the modem, and then have lines running for all the tv's and etc.
Anyways there is no reason why they cant provision that modem, but if there is a problem on your end then it could cause this. So did the people on the other end of the phone say things looked ok when they first provision the modem? |
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ComTech 4
Premium
join:2002-11-28
USA
| reply to akita
Proper Modem Setup |
Wow there is something totally wrong. If you have an amp and still your still at -1, you have a signal problem.
Think of it as this "If you amp garbarge you get more garbage" The power level will improve but not the quality. So without the amp your sitting at -16. |
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akita
@comcast.net
| reply to akita
Thanks for all the replies!
The reason I have the amp (CVT-2/4 PIA) is due to my unusual installation. The cable running from the green tower at the curb to my garage is 175 feet. At that point, Comcast installed a splitter to drive the Arris modem for my phone service. The other leg of the splitter goes to the amp, which supplies the SB6120 and the TVs.
As an experiment, I connected the SB6120 directly to the splitter where the Arris modem is, and noted that the online LED was still flashing and not solid. This is why I was asking if the online light should be on solid even if Comcast has not registered the MAC address. At this drop, the signal is as good as it gets.
I don't like using the amp, but if the signal is poor, why does the SB4100 work, does it have a better chipset?
Here's some more info from the SB6120:
Downstream Bonding Channel Value
Channel ID 1 2 3 4
Frequency 705000000 Hz 717000000 Hz 723000000 Hz 729000000 Hz
Signal to Noise Ratio 36 dB 37 dB 37 dB 38 dB
Downstream Modulation QAM256 QAM256 QAM256 QAM256
Power Level
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
0 dBmV 0 dBmV 0 dBmV 0 dBmV
Upstream Bonding Channel Value
Channel ID 1
Frequency 30600000 Hz
Ranging Service ID n/a
Symbol Rate 5.120 Msym/sec
Power Level 55 dBmV
Upstream Modulation [3] QPSK
[3] 64QAM
Ranging Status Success
Signal Stats (Codewords) Bonding Channel Value
Channel ID 1 2 3 4
Total Unerrored Codewords 21436035 21436421 21436159 21436512
Total Correctable Codewords 13 0 0 0
Total Uncorrectable Codewords 1661 1444 1432 1438
Model Name: SB6120
Vendor Name: Motorola
Firmware Name: SB6120-1.0.1.8-SCM02-NOSH
Boot Version: PSPU-Boot 1.0.0.4m1
Hardware Version: 1.0
Serial Number: 18690****************
Firmware Build Time: Apr 22 2009 12:15:22
From the log:
Jun 30 2009 12:42:05 5-Warning T202.0 Lost MDD Timeout;CM-MAC=00:22:10:2b:68:07;CMTS-MAC=00:01:5c:32:78:c4;CM-QOS=1.0;CM-VER=3.0;
Thanks. |
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nate1234
join:2008-08-21
Moorestown, NJ | reply to akita
Your signal levels are great!
I wonder if it is a defective modem or something? |
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koshoka
join:2006-12-01
Pottsville, PA | Your upstream level is way to high. |
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nate1234
join:2008-08-21
Moorestown, NJ | Its not way too high, it is within limits. It could still be an issue though. |
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madden2k5
join:2009-04-09
Portsmouth, VA | Nate, no the upstream level of 55 is too high.. withen specs or not its pushing it, and can cause problems at any given time.
As for the 6120, only the link bottom light should blink. the online, and etc lights should be solid. |
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akita
@seagate.com
| Thanks all.
I'm really curious to know whether the online light should be on solid even when the SB6120 is not provisioned. This is important because when I had it hooked up right at the first splitter, before Comcast had the new MAC address, the online was blinking. If it should be on solid even under these conditions, then this is a Comcast issue and not related to my wiring...
The upstream level comes from the modem and not influenced by the wiring/amp in the house, right?
I have tried 2 different SB6120s with Comcast with the same results. On both of my calls, the tech had me transfered to the billing dept. to register the S/N and MAC address. Could my problems be related to an account issue where my Performance tier does not allow the use of the SB6120? Just reaching here... |
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EG
Ho Ho Ho
Premium
join:2006-11-18
Union, NJ
1 edit | said by akita :
The upstream level comes from the modem and not influenced by the wiring/amp in the house, right?
Sure it is. It is influenced by excessive overall line attenuation and/or excessive noise ingress into the upstream channel.
Modems will achieve block sync before they are even provisioned provided that the quality of the connection is good. |
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dabulls
@comcast.net | If you hooked it up to where the arris emta is and still have no blocksync then you mostlikely have a defective modem. |
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EG
Ho Ho Ho
Premium
join:2006-11-18
Union, NJ | reply to akita
Could be. I would also suspect that at a 55dB transmit power level, the CMTS may be having difficulties hearing the modem. |
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ComTech 4
Premium
join:2002-11-28
USA
| reply to akita
Proper way for a modem and an Emta |
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dabulls
@comcast.net | reply to akita
Is there a reason why you are not useing the emta for internet? |
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EG
Ho Ho Ho
Premium
join:2006-11-18
Union, NJ
| reply to ComTech 4
said by ComTech 4  :this is the way your setup should be Would you recommend that an unbalanced three-way splitter be used, and that the HSI modem be connected to the 3.5dB tap, and that the eMTA and the amp be connected to the 7.0dB taps ? |
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madden2k5
join:2009-04-09
Portsmouth, VA
·Cox HSI
1 edit | said by EG :said by ComTech 4 :this is the way your setup should be Would you recommend that an unbalanced three-way splitter be used, and that the HSI modem be connected to the 3.5dB tap, and that the eMTA and the amp be connected to the 7.0dB taps ? Personally i would, and as of right now that how i got my setup hooked up. No problems with my VOIP and my internet modem is on the -3.5 off the 3way. |
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EG
Ho Ho Ho
Premium
join:2006-11-18
Union, NJ |  |
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