Re: [Connectivity] Working! WOOT in Comcast HSI http://www.dslreports.com/forum/r20839099 en Wed, 11 Nov 2009 04:21:13 EDT Wed, 11 Nov 2009 04:21:13 EDT Re: [Connectivity] Working! WOOT http://www.dslreports.com/forum/remark,20850434 EG : W.I.W., here is a direct quote from a sticky troubleshooting topic written by a possibly former Forum Administrator at the comcast.net help forums:

>>"• Upstream Power Level: Ideally this should be within the 30dBmV to 50dBmV range. If it is between 50-55dBmV, you are approaching the upper-limits but should still be able to operate. If this is above 55dBmV or below 30dBmV, you will likely start to see frequent disconnects or modem reboots."

This quote was referring to using the QAM 16 upstream modulation scheme.]]> http://www.dslreports.com/forum/remark,20850434 Fri, 25 Jul 2008 22:32:30 EDT Re: [Connectivity] Working! WOOT http://www.dslreports.com/forum/remark,20850385 EG : Well 55dB UPL is not "very good"...

Some of the premise techs word's are not necessarily *gospel*..]]> http://www.dslreports.com/forum/remark,20850385 Fri, 25 Jul 2008 22:22:28 EDT Re: [Connectivity] Working! WOOT http://www.dslreports.com/forum/remark,20850336 Vampyre : the tech looked when he was here after he ran that new cable, and he said, those were very good levels...]]> http://www.dslreports.com/forum/remark,20850336 Fri, 25 Jul 2008 22:11:54 EDT Re: [Connectivity] Working! WOOT http://www.dslreports.com/forum/remark,20850160 alfnoid : Well even with the modem making a guess since you can only really measure it at the CMTS, 55 when it should top at 50 is way too high for a service tech to leave it at.
I am still going to assume that his TX mod is at min QAM16, but the same goes if it were QPSK and the limit were 58.

If I left a modem's TX at 55 back when I was in that position and my sup happened to go out on it because there was a repeat...hell to pay is all I'll tell ya.

I just think that the OP is going to see more issues with connectivity so he may want to get it checked further.

Tell you what...call support tell them you have been have connectivity issues and ask them to tell you your levels.
They have a max/min limit that they are supposed to use to dispatch service calls on.
Assuming you have an extra 30 mins lying around.]]> http://www.dslreports.com/forum/remark,20850160 Fri, 25 Jul 2008 21:34:51 EDT Re: [Connectivity] Working! WOOT http://www.dslreports.com/forum/remark,20850065 Vampyre : So even though it's working I should call a tech.. it took 2 years to get them to even get it to stay connected for more than 30 mins]]> http://www.dslreports.com/forum/remark,20850065 Fri, 25 Jul 2008 21:12:37 EDT Re: [Connectivity] Working! WOOT http://www.dslreports.com/forum/remark,20849931 EG : There is some amount of personal opinion involved here, and the accuracy of any particular modem's measuring mechanism, and its tolerance of marginal or supposedly out of spec signal figures must also be taken into account, and I'm certainly not completely disagreeing with you.

I will say however that "way out of spec" can be somewhat subjective, especially if their modem is not currently re-booting spontaneously and they are not currently experiencing any connectivity issues. ]]> http://www.dslreports.com/forum/remark,20849931 Fri, 25 Jul 2008 20:40:29 EDT Re: [Connectivity] Working! WOOT http://www.dslreports.com/forum/remark,20849497 alfnoid : 55 is way too high not borderline...I bet his TX modulation is not QPSK since his RX is QAM 256...if it were it would be borderline.
So therefore if he has QAM16 like I suspect, it is out of spec and he still needs a tech out.

I have seen QPSK work @ a TX of 62...doesn't mean it should be working or will stay working.]]> http://www.dslreports.com/forum/remark,20849497 Fri, 25 Jul 2008 18:57:44 EDT Re: [Connectivity] Working! WOOT http://www.dslreports.com/forum/remark,20839668 EG :
said by Vampyre See Profile :

Ya, I know.. but with the crappy service I have been getting anything is better then nothing!!! LOL
I wish you the best of luck sir ! :)]]> http://www.dslreports.com/forum/remark,20839668 Wed, 23 Jul 2008 22:59:50 EDT Re: [Connectivity] Working! WOOT http://www.dslreports.com/forum/remark,20839373 Vampyre : Ya, I know.. but with the crappy service I have been getting anything is better then nothing!!! LOL]]> http://www.dslreports.com/forum/remark,20839373 Wed, 23 Jul 2008 21:55:52 EDT Re: [Connectivity] Working! WOOT http://www.dslreports.com/forum/remark,20839147 EG : Oh, no begrudgement intended here and I'm happy that you now have some stable connectivity !! :)

What I am saying is that your current UPL does not leave very much wiggle room in case there are intermittent fluctuations which could very well happen, so I personally wouldn't throw a block party celebrating a level of 55dB, and that you should still be somewhat concerned..]]> http://www.dslreports.com/forum/remark,20839147 Wed, 23 Jul 2008 21:09:43 EDT Re: [Connectivity] Working! WOOT http://www.dslreports.com/forum/remark,20839099 Vampyre : who cares, my modem has not dropped off once...

after all most 2 years of service drops ever 10 mins I'm happy.. and I get blazing fast speeds]]> http://www.dslreports.com/forum/remark,20839099 Wed, 23 Jul 2008 20:59:38 EDT Re: [Connectivity] Working! WOOT http://www.dslreports.com/forum/remark,20838674 EG : W.I.W., 55dB upstream power is still marginal..]]> http://www.dslreports.com/forum/remark,20838674 Wed, 23 Jul 2008 19:38:33 EDT [Connectivity] Working! WOOT http://www.dslreports.com/forum/remark,20838622 Vampyre : Ok, so I've posted my problems in here before... about how my modem would drop connection and I would have to go outside and unplug the cable from the house and reconnect it to get the singal back...

after 1 year of that, I got a tech out here to work on it, and low and behold he fixed it. and it was the very same thing I told them needed to be done 2 techs ago....

he ended up replacing the cable from the pole to the house (they still need to come bury it) but it's working like a champ now... no drops for 1 week...

and my modem levels have never looked better...

Downstream Value
Frequency 711000000 Hz
Signal to Noise Ratio 36 dB
QAM QAM256
Network Access Control Object ON
Power Level -3 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 1
Frequency 34400000 Hz
Ranging Service ID 726
Symbol Rate 2.560 Msym/s
Power Level 55 dBmV ]]> http://www.dslreports.com/forum/remark,20838622 Wed, 23 Jul 2008 19:28:32 EDT