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I am having issues with download speeds never reaching more than 10-40Mbs on a 100Mbs plan.

I noticed the following in the log: "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out"


"Started Unicast Maintenance Ranging - No Response received - T3 time-out;"

With priority 3

For download I have for channel 25 (Id 1)
Freq. 573.00 MHz,
power:-4.00 dBmV
Snr:38.61 dB
Uncorrectables: 0

And in upload
Symbol rate: 5120 kSym/s
Freq: 37.80 MHz
power:46.50 dBmV

When I try to troubleshooting using the Xfinity app it always says that something odd has been detected and they will reboot the modem.

Any ideas?

Re: SB6190

Are there any more channels being shown other than the single downstream and single upstream channel that you posted ?

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Frequent Visitor

Re: SB6190

Yes there 32 channels for download and 4 in the upload. Among the download there is one that appear odd. Channel:8;
Frequncy: 465.00MHz Power:-3.80 dBmV
SNR: 38.98 dB
Corrected: 1093
Uncorrectables: 24937

All the upload look the same as previously posted but different frequencies.
Frequent Visitor

Re: SB6190

I moved an antenna signal amplifier and I noticed that all download channels show no uncorrectables packets. SNR is between 38.9 and 37.6.

Still the max download speed is between 20-50Mbs on a (up to) 100Mbs. Is that normal? Of course with up to ... Anything goes, but I was hoping for 10/15% less not 50-80%.