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Gigabit service drops to 5-7 Mbps daily until modem reset

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New Poster

Gigabit service drops to 5-7 Mbps daily until modem reset

I am using a purchased Arris SB8200 modem, and running speed tests from a computer hardwired into Orbi router. Every 1-2 days, my gigabit connection (which usually only runs between 500-600 Mbps anyway) will drop to 5-7 Mbps. It will stay there until I do a hard reset on my modem. I've called both Comcast and Arris about this issue, and of course each company blames the other. Who is correct?? Is this a modem issue or a connection issue? I really don't want to have to purchase another modem, they're not cheap. I've attached the router status and event log below. This is right after I did a hard reset.

 

Thanks! 

 

Procedure Status Comment
Acquire Downstream Channel 577750000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK  
Security Enabled BPI+
DOCSIS Network Access Enabled Allowed  

 

 
Downstream Bonded Channels
Channel ID Lock Status Modulation Frequency Power SNR/MER Corrected Uncorrectables
13 Locked QAM256 577750000 Hz 8.1 dBmV 42.9 dB 0 0
10 Locked QAM256 559750000 Hz 7.8 dBmV 42.8 dB 0 0
11 Locked QAM256 565750000 Hz 7.8 dBmV 42.7 dB 0 0
12 Locked QAM256 571750000 Hz 7.8 dBmV 42.5 dB 0 0
14 Locked QAM256 583750000 Hz 8.0 dBmV 42.7 dB 0 0
15 Locked QAM256 589750000 Hz 7.9 dBmV 42.9 dB 0 0
16 Locked QAM256 595750000 Hz 8.1 dBmV 42.8 dB 0 0
17 Locked QAM256 601750000 Hz 8.1 dBmV 42.7 dB 0 0
18 Locked QAM256 607750000 Hz 7.9 dBmV 42.6 dB 0 0
19 Locked QAM256 613750000 Hz 8.0 dBmV 42.7 dB 0 0
20 Locked QAM256 619750000 Hz 8.1 dBmV 42.8 dB 0 0
21 Locked QAM256 625750000 Hz 7.8 dBmV 42.7 dB 0 0
22 Locked QAM256 631750000 Hz 7.9 dBmV 42.6 dB 0 0
23 Locked QAM256 637750000 Hz 8.0 dBmV 42.7 dB 0 0
24 Locked QAM256 643750000 Hz 7.9 dBmV 42.7 dB 0 0
25 Locked Other 780000000 Hz 8.2 dBmV 41.0 dB 74447039 0
26 Not Locked QAM256 0 Hz 0.0 dBmV 42.6 dB 0 0
27 Locked QAM256 649750000 Hz 7.9 dBmV 42.5 dB 0 0
28 Locked QAM256 655750000 Hz 7.8 dBmV 42.5 dB 0 0
29 Locked QAM256 661750000 Hz 7.6 dBmV 42.6 dB 0 0
30 Locked QAM256 667750000 Hz 7.6 dBmV 41.6 dB 0 0
31 Locked QAM256 673750000 Hz 7.6 dBmV 42.7 dB 0 0
32 Locked QAM256 679750000 Hz 7.6 dBmV 42.6 dB 0 0
33 Locked QAM256 685750000 Hz 7.7 dBmV 42.7 dB 0 0
34 Locked QAM256 691750000 Hz 7.8 dBmV 42.7 dB 0 0
35 Locked QAM256 697750000 Hz 7.7 dBmV 42.7 dB 0 0
36 Locked QAM256 703750000 Hz 7.7 dBmV 42.7 dB 0 0
37 Locked QAM256 709750000 Hz 7.7 dBmV 42.7 dB 0 0
38 Locked QAM256 715750000 Hz 7.8 dBmV 42.7 dB 0 0
39 Locked QAM256 721750000 Hz 7.8 dBmV 42.4 dB 0 0
40 Locked QAM256 727750000 Hz 7.6 dBmV 42.6 dB 0 0
41 Locked QAM256 733750000 Hz 7.9 dBmV 42.7 dB 0 0


 

 
Upstream Bonded Channels
Channel Channel ID Lock Status US Channel Type Frequency Width Power
1 4 Locked SC-QAM Upstream 36500000 Hz 6400000 Hz 42.0 dBmV
2 1 Locked SC-QAM Upstream 17300000 Hz 6400000 Hz 42.0 dBmV
3 2 Locked SC-QAM Upstream 23700000 Hz 6400000 Hz 42.0 dBmV
4 3 Locked SC-QAM Upstream 30100000 Hz 6400000 Hz 42.0 dBmV

 

Date Time Event ID Event Level Description
06/25/2020 08:46 67061600 6 "DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 2436694066 6 "Honoring MDD; IP provisioning mode = IPv6"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
06/21/2020 07:19 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
05/21/2020 05:54 2436694044 3 "Resetting the cable modem due to docsDevResetNow"
05/19/2020 12:34 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
05/01/2020 10:21 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
05/01/2020 10:21 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
05/01/2020 10:21 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
05/01/2020 10:20 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
05/01/2020 10:20 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:95:69:fb:ca:59;CMTS-MAC=00:01:5c:6a:78:62;CM-QOS=1.1;CM-VER=3.1;"
Highlighted
Contributor

Re: Gigabit service drops to 5-7 Mbps daily until modem reset

The Rf signal looks good so unless there is fluctuation in the RF or an Upstream SNR issue in your area. With the limited info I would have to lean towards it is an issue with your equipment.

-Are you hardwired into the Orbi that is hardwired into the modem? Or are you hardwired into a wireless Orbi unit?

-Your getting 500-600 Mbps hardwired into the Orbi but what do you get if your hardwired directly into the modem?

 -When the speeds drop did someone in the house start doing something? (smart TV, play music on a Sono’s like system, online gaming, someone just got home)

 

Without know everything I would probably try-

-Replace the Ethernet cords (especially the ones that came with the Orbi’s)

- Make sure all coax connectors are tight (on the modem, wall plate, any cable splitters in the house)

-If possible hard wire directly into the modem tomorrow morning and see if the same issue happens at al tomorrow. (Would help to see if the issue is with the Orbi’s or the modem. If you still get the same issue when your directly plugged into the modem, then it could be a modem or a Comcast issue, but it would help to narrow down what could be causing the issues.) The speeds your seeing when your not having the issue seems like the Orbi’s are limiting your speeds, should be getting 940 to 970 Mbps download hardwired.

Highlighted
New Poster

Re: Gigabit service drops to 5-7 Mbps daily until modem reset

Thank you for the reply. The PC is hardwired into the Orbi, and the Orbi is hardwired into the Arris.

 

I just changed my connection to plug the PC directly into the Arris using CAT 6 cable. On the xfinity speedtest, I'm getting 760Mbps. Typically the speed drops to 5-7 Mbps aren't tied to any specific event. I'll notice them usually in the evenings when I settle down for a video call, online gaming, or browsing on my phone. Not consistent to a single device or activity. I'll just notice the connection is sluggish, do a speed test, and it comes up 5-7 Mbps. At that point I go reset my modem and things go back to normal for a day or two.

 

Also, I just noticed that after this most recent modem reboot, one of the downstream channels is showing significant errors, and the upstream power has now jumped about 10 dBmV.

 

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 577750000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK  
Security Enabled BPI+
DOCSIS Network Access Enabled Allowed  

 

 
Downstream Bonded Channels
Channel ID Lock Status Modulation Frequency Power SNR/MER Corrected Uncorrectables
13 Locked QAM256 577750000 Hz 6.2 dBmV 38.8 dB 8 28
10 Locked QAM256 559750000 Hz 6.5 dBmV 41.1 dB 0 0
11 Locked QAM256 565750000 Hz 6.3 dBmV 40.7 dB 0 0
12 Locked QAM256 571750000 Hz 6.2 dBmV 39.1 dB 0 0
14 Locked QAM256 583750000 Hz 6.1 dBmV 37.7 dB 0 0
15 Locked QAM256 589750000 Hz 6.4 dBmV 38.9 dB 0 0
16 Locked QAM256 595750000 Hz 6.8 dBmV 39.8 dB 0 0
17 Locked QAM256 601750000 Hz 7.0 dBmV 40.6 dB 0 0
18 Locked QAM256 607750000 Hz 6.9 dBmV 41.0 dB 0 0
19 Locked QAM256 613750000 Hz 7.1 dBmV 35.5 dB 0 0
20 Locked QAM256 619750000 Hz 7.2 dBmV 38.1 dB 0 0
21 Locked QAM256 625750000 Hz 6.9 dBmV 41.2 dB 0 0
22 Locked QAM256 631750000 Hz 7.0 dBmV 34.5 dB 498385 131396
23 Locked QAM256 637750000 Hz 7.0 dBmV 37.1 dB 870 0
24 Locked QAM256 643750000 Hz 7.0 dBmV 41.8 dB 0 0
25 Locked Other 780000000 Hz 8.2 dBmV 38.8 dB 28493991 0
26 Not Locked QAM256 0 Hz 0.0 dBmV 42.1 dB 0 0
27 Locked QAM256 649750000 Hz 7.1 dBmV 42.3 dB 0 0
28 Locked QAM256 655750000 Hz 7.0 dBmV 42.5 dB 0 0
29 Locked QAM256 661750000 Hz 7.0 dBmV 42.4 dB 0 0
30 Locked QAM256 667750000 Hz 7.0 dBmV 42.0 dB 0 0
31 Locked QAM256 673750000 Hz 7.0 dBmV 42.6 dB 0 0
32 Locked QAM256 679750000 Hz 7.0 dBmV 42.5 dB 0 0
33 Locked QAM256 685750000 Hz 7.2 dBmV 42.7 dB 0 0
34 Locked QAM256 691750000 Hz 7.4 dBmV 42.5 dB 0 0
35 Locked QAM256 697750000 Hz 7.3 dBmV 42.5 dB 0 0
36 Locked QAM256 703750000 Hz 7.4 dBmV 42.5 dB 0 0
37 Locked QAM256 709750000 Hz 7.4 dBmV 42.0 dB 0 0
38 Locked QAM256 715750000 Hz 7.6 dBmV 42.8 dB 0 0
39 Locked QAM256 721750000 Hz 7.6 dBmV 39.3 dB 0 0
40 Locked QAM256 727750000 Hz 7.4 dBmV 35.7 dB 34164 2095
41 Locked QAM256 733750000 Hz 7.8 dBmV 38.8 dB 0 0


 

 
Upstream Bonded Channels
Channel Channel ID Lock Status US Channel Type Frequency Width Power
1 4 Locked SC-QAM Upstream 36500000 Hz 6400000 Hz 51.0 dBmV
2 1 Locked SC-QAM Upstream 17300000 Hz 6400000 Hz 55.0 dBmV
3 2 Locked SC-QAM Upstream 23700000 Hz 6400000 Hz 50.0 dBmV
4 3 Locked SC-QAM Upstream 30100000 Hz 6400000 Hz 51.0 dBmV


 

 

Current System Time: Thu Jun 25 10:24:11 2020

Highlighted
Expert

Re: Gigabit service drops to 5-7 Mbps daily until modem reset

The RF signals do not "look good" as others have suggested. The SNR's on some of the downstream channels are too low;

 

19 Locked QAM256 613750000 Hz 7.1 dBmV 35.5 dB 0 0
20 Locked QAM256 619750000 Hz 7.2 dBmV 38.1 dB 0 0
21 Locked QAM256 625750000 Hz 6.9 dBmV 41.2 dB 0 0
22 Locked QAM256 631750000 Hz 7.0 dBmV 34.5 dB 498385 131396
23 Locked QAM256 637750000 Hz 7.0 dBmV 37.1 dB 870 0
24 Locked QAM256 643750000 Hz 7.0 dBmV 41.8 dB 0 0
25 Locked Other 780000000 Hz 8.2 dBmV 38.8 dB 28493991 0

 

Looks like there is extraneous noise ingressing into the line somewhere at those frequencies. 

 

Also, the upstream power is too high / out of spec. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, and latency problems.

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there 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 types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

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.



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