Here are the technical specs:
Downstream
Channel ID: 123, Frequency: 579000000 Hz, Signal to Noise Ratio: 37 dB, Downstream Modulation: QAM256, Power Level: 7 dBmV
Channel ID: 121, Frequency: 567000000 Hz , Signal to Noise Ratio: 37 dB, Downstream Modulation: QAM256, Power Level: 7 dBmV
Channel ID: 122, Frequency: 573000000 Hz, Signal to Noise Ratio: 37 dB, Downstream Modulation: QAM256, Power Level: 7 dBmV
Channel ID: 124, Frequency: 585000000 Hz, Signal to Noise Ratio: 37 dB, Downstream Modulation: QAM256, Power Level: 7 dBmV
Upstream:
Channel ID 3, Frequency: 23800000 Hz, Ranging Service ID: 71, Symbol Rate: 5.120 Msym/sec, Power Level: 40 dBmV, Upstream Modulation: [3] QPSK, [3] 64QAM, Ranging Status: Success
Channel ID 1, Frequency: 36800000 Hz, Ranging Service ID: 71, Symbol Rate: 5.120 Msym/sec, Power Level: 40 dBmV, Upstream Modulation: [3] QPSK, [3] 64QAM, Ranging Status: Success
Channel ID 2, Frequency: 30300000 Hz, Ranging Service ID: 71, Symbol Rate: 5.120 Msym/sec, Power Level: 40 dBmV, Upstream Modulation: [3] QPSK, [3] 64QAM, Ranging Status: Success
Sharper Probe results (note I've run this twice, both times upstream measurement was aborted due to high packet loss...):
DiffProbe release. January 2012. Build 1008.
Shaper Detection Module.
Connected to server 64.9.225.166.
Estimating capacity:
Upstream: 5935 Kbps.
Downstream: 28919 Kbps.
The measurement will take upto 2.5 minutes. Please wait.
Checking for traffic shapers:
Upstream: Measurement aborted due to high packet loss rate.
Downstream: No shaper detected.
Median received rate: 28336 Kbps.
For more information, visit: http://www.cc.gatech.edu/~partha/diffprobe
Modem details:
Model Name: SB6121
Vendor Name: Motorola
Firmware Name: SB_KOMODO-1.0.6.10-SCM00-NOSH
Boot Version: PSPU-Boot(25CLK) 1.0.12.18m3
Hardware Version: 5.0
Serial Number: 359079213126064201012019
Firmware Build Time: Oct 29 2012 18:07:13
Description of the problem:
With all the tech stuff out of the way, the issue is that during peak hours (7:30pm - 12:00am) I am seeing significant packet loss, and occasionally degreadation of upload throughput. I subscribe to a 25/5 plan (I think it is called Performance)...
Any packet loss makes playing online games or streaming video pretty terrible, and I've seen rates between 2% and 15% depending on when I check (used http://www.pingtest.net/, among others -- see this report from their site which I just ran: http://www.pingtest.net/result/93666465.png).
I started noticing the issue in the last 1-2 weeks. I have spoken with a comcast rep and they reset my connection remotely, but I have not had a tech out. The problem was not resolved by the remote connection reset (obviously), and the fact that it is during peak hours only makes me assume that there is something wrong upstream from me somewhere...
Anyone have any suggestions for what to do?
Thanks.