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shrijbala's avatar
shrijbala
Aspirant
Dec 09, 2022

8-stream AX WiFi Gateway (CAX80)

Hello, I have 2 questions :    1) I have high speed 1Gbps internet connection and at time i see the issue with Upstream level. Xfinity is my provider and they confirmed that everything is good at ...
FURRYe38's avatar
FURRYe38
Guru - Experienced User
Dec 09, 2022

Please post a copy and paste of the modems connection status and event log page.
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-modem-modem-router
https://kb.netgear.com/30008/How-do-I-view-or-clear-the-event-logs-on-my-NETGEAR-cable-modem-or-modem-router

 

Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box. 
Be sure your using good quality RG6 coax cable up to the modem. 
Start with removing any amplifiers, signal attenuators, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html

 

EAX80 would be a good match for a extender. 

What is the size of your home? Sq Ft?

  • shrijbala's avatar
    shrijbala
    Aspirant
    Dec 09, 2022

    Hi,

     

    ISP has verified and we have removed all the splitters that were left over in the past. I'm not sure if the insulation across the walls is hampering the signal. House is about 2000 sqft.

     

    Time Priority Description 
    Thu Dec 8 08:42:39 2022Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Thu Dec 8 08:42:42 2022Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Thu Dec 8 08:42:48 2022Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Thu Dec 8 08:43:39 2022Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Thu Dec 8 08:43:39 2022Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Thu Dec 8 08:43:59 2022Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Thu Dec 8 08:44:00 2022Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Thu Dec 8 08:44:18 2022Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Thu Dec 8 08:44:19 2022Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Thu Dec 8 08:44:38 2022Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Thu Dec 8 08:44:39 2022Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Thu Dec 8 08:44:59 2022Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Thu Dec 8 08:45:04 2022Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
    Thu Dec 8 09:09:05 2022Notice (6)TLV-11 - unrecognized OID;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Thu Dec 8 09:09:23 2022Notice (6)DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Thu Dec 8 11:06:52 2022Notice (6)CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Thu Dec 8 11:07:21 2022Notice (6)CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Wed Dec 7 22:42:27 2022Critical (3)Resetting the cable modem due to docsDevResetNow
    Wed Oct 26 00:07:07 2022Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Wed Oct 26 00:07:08 2022Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Wed Oct 26 00:07:27 2022Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Wed Oct 26 00:07:28 2022Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Wed Oct 26 00:07:47 2022Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Wed Oct 26 00:07:52 2022Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
    Thu Jan 1 00:00:44 1970Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
    Thu Jan 1 00:00:44 1970Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
    Thu Jan 1 00:00:49 1970Critical (3)No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Thu Jan 1 00:00:55 1970Notice (6)Honoring MDD; IP provisioning mode = IPv6
    Thu Jan 1 00:02:07 1970Critical (3)No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Thu Jan 1 00:03:52 1970Critical (3)No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Thu Jan 1 00:05:15 1970Critical (3)No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    Thu Jan 1 00:06:38 1970Critical (3)No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:40:02:78;CMTS-MAC=04:2a:e2:c6:ba:b4;CM-QOS=1.1;CM-VER=3.1;
    • shrijbala's avatar
      shrijbala
      Aspirant
      Dec 09, 2022

      To add, CAX80 is my modem + router and I do not have a separate Modem from the ISP. My home is 2000+ sqft but has 3 floors.

       

      Does 1 EAX80 sufficient for this?

       

      Thanks,

      Bala