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Why does my connection die while I'm using Zoom?

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Why does my connection die while I'm using Zoom?

My internet connection (wifi) breaks several times per day, only when I'm on Zoom. I can't understand why. is it a problem with my internet speed and I need a better package? Is it a problem with the modem/router not being able to handle Zoom meetings over wifi? It's hugely disruptive to my work as I'm working 100% remote and am on Zoom for several hours per day. I'm on a Motorola MG7315.

How can I resolve this? I'm willing to spend money, but I don't know where to spend it! New wifi router? New modem? 

Fri Jul 24 13:37:28 2020   Critical (3)  No UCDs Received - Timeout;;CM-MAC=00:40:36:5c:d7:68;CMTS-MA... 
 Fri Jul 24 13:37:47 2020   Critical (3)  No UCDs Received - Timeout;;CM-MAC=00:40:36:5c:d7:68;CMTS-MA... 
 Fri Jul 24 13:38:06 2020   Critical (3)  No UCDs Received - Timeout;;CM-MAC=00:40:36:5c:d7:68;CMTS-MA... 
 Fri Jul 24 13:39:00 2020   Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/... 
 Fri Jul 24 13:39:09 2020   Critical (3)  No Ranging Response received - T3 time-out;CM-MAC=00:40:36:5... 
 Fri Jul 24 13:39:33 2020   Critical (3)  No Ranging Response received - T3 time-out;CM-MAC=00:40:36:5... 
 Mon Jul 27 13:46:27 2020   Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/... 
 Mon Jul 27 13:47:14 2020   Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/... 
 Mon Jul 27 13:47:14 2020   Critical (3)  Received Response to Broadcast Maintenance Request, But no U... 
 Mon Jul 27 13:47:18 2020   Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/... 
 Mon Jul 27 13:47:18 2020   Critical (3)  Received Response to Broadcast Maintenance Request, But no U... 
 Time Not Established  Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/... 
 Time Not Established  Critical (3)  No Ranging Response received - T3 time-out;CM-MAC=00:40:36:5... 
 Tue Jul 28 17:18:30 2020   Critical (3)  No Ranging Response received - T3 time-out;CM-MAC=00:40:36:5... 
 Tue Jul 28 19:56:10 2020   Critical (3)  No Ranging Response received - T3 time-out;CM-MAC=00:40:36:5... 
 Wed Jul 29 11:04:41 2020   Critical (3)  Resetting the cable modem due to docsDevResetNow 
 Wed Jul 29 11:16:21 2020   Critical (3)  Resetting the cable modem due to docsDevResetNow 
 Wed Jul 29 11:18:36 2020   Critical (3)  Resetting the cable modem due to docsDevResetNow 
 Wed Jul 29 11:55:12 2020   Critical (3)  Resetting the cable modem due to docsDevResetNow 
 Thu Jul 30 09:05:53 2020   Critical (3)  Started Unicast Maintenance Ranging - No Response received -... 
 Thu Jul 30 09:06:01 2020   Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/... 
 Thu Jul 30 09:06:46 2020   Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/... 
 Thu Jul 30 09:06:46 2020   Critical (3)  Received Response to Broadcast Maintenance Request, But no U... 
 Thu Jul 30 09:06:49 2020   Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/... 
 Thu Jul 30 09:06:49 2020   Critical (3)  Received Response to Broadcast Maintenance Request, But no U... 
 Thu Jul 30 09:06:54 2020   Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/... 
 Thu Jul 30 09:06:54 2020   Critical (3)  Received Response to Broadcast Maintenance Request, But no U... 
 Thu Jul 30 09:06:59 2020   Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/... 
 Thu Jul 30 09:06:59 2020   Critical (3)  Received Response to Broadcast Maintenance Request, But no U... 
 Time Not Established  Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/... 
 Fri Jul 31 08:35:12 2020   Critical (3)  Resetting the cable modem due to docsDevResetNow 
 Time Not Established  Notice (6)  Honoring MDD; IP provisioning mode = IPv6