10 Messages
Slow download speeds
I have the Connect More "300Mbps" rated speed and my own Motorola MB7621 modem. Modem was purchased new a little over four years ago. My PC is connected via ethernet cable. I am getting about 93 Mbps downloads, 23 Mbps uploads and 18 ms latency. I called, talked to a robot, and was sent a link and was texted immediately that a technician need to come out. One is scheduled to come tomorrow, but if someone can determine that it's most likely my modem, I'd rather cancel and just purchase.
Lately my internet has been going out and restarting the modem has fixed it. Last night it went out again and was still out this morning. Turning off, waiting 30 seconds, and turning back on didn't fix it this time. So I tried unplugging power cord and also coax cable, plugging both in and that worked.
Only started attempting speed tests the past few weeks and always under 100 Mbps.
Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;
EG
Expert
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110.2K Messages
11 months ago
Please also copy all of the text in its entirety of the *Downstream Power Levels*, the *SNR's* (Signal to Noise Ratios), and the *Upstream Power Level* numbers and paste them into your next post.
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EG
Expert
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110.2K Messages
11 months ago
Yes. This may or may not be the root cause of the problem (YMMV) but it should be addressed regardless.
The upstream power is borderline / high and it may be intermittently fluctuating even higher to out-of-spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.
In an effort to try to obtain better connectivity / more wiggle room, check to see if there are any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage from Home Depot, Target, Wal-Mart, etc. Splitters should be swapped with known to be good / new ones to test.
Also check the coax cable for any damage such as cuts, nicks, abrasions, kinks, sharp bends, etc.
If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two-way splitter connected directly off of the drop from the street / pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.
Good luck with it !
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EG
Expert
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110.2K Messages
11 months ago
@user_uwixj4
Have you had a chance to see if any of those tips apply ?
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