Service speed issues

[bmehling]

We recently upgraded our service package to 600Mb from 200Mb and have seen no increase in speeds. In fact, and maybe just because I'm looking more, speeds are worse/all over the place, ranging from 90Mb to 250Mb, occassionally hitting close to 300Mb. Also having some latency issues. When we upgraded, I realized our modem was not up to the task of transmitting 600Mb (rated for 343Mb), so I got a new Morotola MB7621 (Gigabit rated), which is a Comcast certified modem. I've talked to Comcast support a couple times, and they said things look Ok on their end, but I was just checking in the modem interface and have found some errors that I've seen others reporting here. I'll post the errors and connection stats below. The previous owners on the house had cable running into nearly every room of the house and had a 5 way splitter installed in the junction box, which I have removed so it's just the incoming line running directly into the modem. No cable TV, no splits, although there is a junction from the line running into the house into an inside cable.

Time	Priority	Description
Time Not Established	Critical (3)	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=00:40:36:6b:37:e6;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not Established	Critical (3)	No Ranging Response received - T3 time-out;CM-MAC=00:40:36:6b:37:e6;CMTS-MAC=00:01:5c:7f:ba:4e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established	Notice (6)	Honoring MDD; IP provisioning mode = IPv6
Sun Oct 04 09:51:45 2020	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=00:40:36:6b:37:e6;CMTS-MAC=00:01:5c:7f:ba:4e;CM-QOS=1.1;CM-VER=3.0;

Startup Sequence

Startup Step Status Comment       Acquire Downstream Channel 573000000 Hz Locked       Upstream Connection OK Operational       Boot State OK Operational       Configuration File OK d11_m_mb7621_extremepro_c01.cm       Security Enabled BPI+

Connection Status

System Up Time 0 days 16h:56m:40s         Network Access Allowed

Downstream Bonded Channels

Channel Lock Status Modulation Channel ID Freq. (MHz) Pwr (dBmV) SNR (dB) Corrected Uncorrected 1 Locked QAM256 9 573.0 5.5 39.1 0 0 2 Locked QAM256 42 447.0 10.3 41.5 0 0 3 Locked QAM256 43 453.0 9.7 40.2 0 0 4 Locked QAM256 44 459.0 10.1 41.3 0 0 5 Locked QAM256 45 465.0 10.8 41.7 0 0 6 Locked QAM256 38 471.0 10.2 41.2 0 0 7 Locked QAM256 39 477.0 8.9 40.5 1 0 8 Locked QAM256 40 483.0 8.8 40.2 1 0 9 Locked QAM256 41 489.0 9.5 40.9 0 0 10 Locked QAM256 33 495.0 9.1 40.7 0 0 11 Locked QAM256 34 501.0 7.2 39.9 0 0 12 Locked QAM256 35 507.0 6.7 35.0 1 0 13 Locked QAM256 36 513.0 8.2 40.2 0 0 14 Locked QAM256 1 519.0 8.6 40.5 0 0 15 Locked QAM256 2 525.0 7.9 40.2 0 0 16 Locked QAM256 3 531.0 7.7 40.1 0 0 17 Locked QAM256 4 537.0 7.3 42.2 0 0 18 Locked QAM256 5 543.0 7.8 42.4 0 0 19 Locked QAM256 6 555.0 7.7 42.3 0 0 20 Locked QAM256 7 561.0 7.3 42.2 0 0 21 Locked QAM256 8 567.0 5.6 41.7 0 0 22 Locked QAM256 10 579.0 5.7 41.8 0 0 23 Locked QAM256 11 585.0 6.4 42.1 0 0 24 Locked QAM256 12 591.0 7.5 42.3 0 0 Total             3 0

Upstream Bonded Channels

Channel Lock Status Channel Type Channel ID Symb. Rate (Ksym/sec) Freq. (MHz) Pwr (dBmV) 1 Locked ATDMA 3 5120 22.8 34.8 2 Locked ATDMA 1 5120 35.6 33.8 3 Locked ATDMA 2 5120 29.2 35.3 4 Locked ATDMA 4 5120 16.4 34.5 5 Not Locked Unknown 0 0 0 0.0 6 Not Locked Unknown 0 0 0 0.0 7 Not Locked Unknown 0 0 0 0.0 8 Not Locked Unknown 0 0 0 0.0

[EG]

Are there more error log entries being shown ? If so, please post them in their entirety. Those "Time Not Established" ones that you posted indicate only one single event.