New Contributor
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4 Messages
Low, inconsistent speeds despite good signal & SNR values.
We were on 16/3 service years ago. Then 27/7 for the past couple of years. I noticed low upload speeds and issues and saw in our panel, we were listed on 16/3 service still. It was claimed that we were provisioned for 27/7 but we didn't see those speeds. We got a credit and moved to 25/10 recently.
I still see 16/3 service in my panel here:
https://businessclass.comcast.net/Secure/MyAccount/MyAccountHero/
The best figures I have seen are 28 down and 10 up. They never happend at the same time and our upload is very inconsistent, hovering around 3-6. This makes our QOS very hard to set for our voip due to the variable upload. Some days the download will drop to 3 and upload will be at 10. Other days we see download at 25 and upload at 2. Typical figures are 20/5. The variability on upload is what is killing me and I really want to get the 10 up.
Typical figures are upstream power 41db. Downstream -1.5db, SNR 37. SMC D3G, fixed IP. Calling tech support for business is difficult. Techs are generally no better than consumer techs and want to come in the middle of the day and take our network down (voip & mission critical functions should not go down m-f, 9-5).
There is an line -6db attenuator I am thinking about swapping to -3db though I think this will have little to no effect overall. I was thinking dropping the upload power slightly may help with the upload consistency.
I've had periodic good luck on the consumer side with techs who were able to re-provision the modem with some tweaks to get the service level we pay for. I don't want to spend 6+hours with techs in person and on phone. Ideas?
kraze
Problem solver
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305 Messages
9 years ago
Your levels look good for the most part, but it could hurt to swap out attenuator. Personally I'd try bypassing it completely and see if anything changes. If not, it's probably safe to leave as is. As for the tech visit, IIRC they should do appointments as late as 8 P.M, but that could be area specific. If not, your only option may be just ask for the latest appointment and hope the guy runs behind schedule.
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vtjballeng
New Contributor
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4 Messages
9 years ago
I tried with a good 3.5db attenuator. Same SNR (37). Downstream +2 to 2.5db. Upstream is now 38db. 28mbps down, 6-7mbps up.
With no attenuator, the SNR is the same (37). Doenstream is +4.5 to 5db. Upstream is now 35db. 28mbps down, 6-7mbps up.
I don't want the level that high on the modem and I see no differece with the attenuator vs without, so I will leave this with the 3.5db attenuator.
I was hoping someone here could modify my upstream values so I can get full bandwidth.
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vtjballeng
New Contributor
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4 Messages
9 years ago
Thanks! I'll contact Comcast_Jon via PM. When a tech comes out, I am typically educating them on their job. It isn't that I know that much, I just have strong networking knowledge andknow cable connection basics. The tech's are typically VERY poorly educated, though I have run into some exceptionally knowledgeable ones.
Usually the result is that they simply make a call to get something changed that I was not authorized to alter.
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kraze
Problem solver
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305 Messages
9 years ago
Sadly, that would all need to be done on-site via a tech, and if he couldn't get levels within an acceptable range he would likely have to call for a line technician.
Though, it never hurts PMing an admin here and asking for an escalation. Try reaching out to Comcast_Jon to see if he can provide some assistance.
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kraze
Problem solver
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305 Messages
9 years ago
To a degree that's understandable, as the techs job really isn't to know networking as they handle more of the physical aspect of networking. After signal levels/interference and some other obvious concerns what they do is more physical. Is the equipment functioning properly, is the connection tight, is the cable damaged..etc.
The sad thing is if all that's looks good to them then it normally means there isn't an issue. Which isn't always the case.
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