internet service slowed to less than a crawl

Event log on my router... internet service slowed to less than a crawl. Have rebooted router and laptop. Unacceptable.

Tue Nov 24 21:30:55 2015 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; Tue Nov 24 21:30:13 2015 Notice (6) TLV-11 - unrecognized OID;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; Mon Nov 23 10:01:38 2015 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; Mon Nov 23 10:00:35 2015 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; Mon Nov 23 09:58:55 2015 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; Mon Nov 23 09:58:40 2015 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; Mon Nov 23 09:58:40 2015 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; Mon Nov 23 09:58:25 2015 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; Mon Nov 23 09:58:25 2015 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; Mon Nov 23 09:57:07 2015 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; Sat Nov 21 17:38:50 2015 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; Fri Nov 20 13:01:37 2015 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; Sun Nov 15 11:56:25 2015 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; Sat Nov 07 05:47:06 2015 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0;