C7000-100NAS - 100 Mbs Download, 1 Mbs upload?

[SeonTheNeon]

I am currently using Cox Communications as my service provider. The modem/router duo (C7000-100NAS) I have is running firmware version V1.01.18. I have heard numerous reports about this model having very poor performance. Whilst I am receiving 100 Mbs download speeds, my upload, of which I am very reliant upon, is reaching a maximum of 1 Mbs. This is very startling for me, as I am paying for 100 down and up. Any suggestions or reasons for this happening? The event logs and cable connection are posted below.

Event Log:

Time Priority Description 1970-1-1, 00:00:40 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:00:43 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:00:38 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 2016-12-26, 12:43:43 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:1b:54:ca:f9:8b;CM-QOS=1.1;CM-VER=3.0; 2016-12-28, 09:57:26 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:1b:54:ca:f9:8b;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:00:37 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:00:39 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 2016-12-28, 17:25:16 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:1b:54:ca:f9:8b;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:00:37 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 2016-12-29, 22:05:14 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:1b:54:ca:f9:8b;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:00:37 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 2016-12-29, 22:07:09 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:1b:54:ca:f9:8b;CM-QOS=1.1;CM-VER=3.0; 2016-12-29, 22:07:44 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:1b:54:ca:f9:8b;CM-QOS=1.1;CM-VER=3.0; 2016-12-29, 22:07:57 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:1b:54:ca:f9:8b;CM-QOS=1.1;CM-VER=3.0; 1970-1-1, 00:00:39 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 1970-1-1, 00:00:42 Notice (6) WiFi Interface [wl0] set to Channel 1 (Side-Band Channel:N/A) - Reason:INIT 1970-1-1, 00:00:42 Notice (6) WiFi Interface [wl1] set to Channel 153 (Side-Band Channel:N/A) - Reason:INIT 1970-1-1, 00:00:49 Notice (6) Honoring MDD; IP provisioning mode = IPv4 1970-1-1, 00:00:51 Warning (5) DHCP WARNING - Non-critical field invalid in response ;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:1b:54:ca:f9:8b;CM-QOS=1.0;CM-VER=3.0; 2016-12-29, 22:09:20 Notice (6) TLV-11 - unrecognized OID;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:1b:54:ca:f9:8b;CM-QOS=1.1;CM-VER=3.0; 2016-12-29, 22:09:24 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:1b:54:ca:f9:8b;CM-QOS=1.1;CM-VER=3.0; 2016-12-29, 22:10:02 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:1b:54:ca:f9:8b;CM-QOS=1.1;CM-VER=3.0; 2016-12-29, 22:36:55 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:1b:54:ca:f9:8b;CM-QOS=1.1;CM-VER=3.0; 2016-12-29, 22:51:19 Notice (6) WiFi Interface [wl0] set to Channel 1 (Side-Band Channel:5) - Reason:INTERFERENCE 2016-12-29, 22:56:07 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:7f:b9:dc:30:e8;CMTS-MAC=00:1b:54:ca:f9:8b;CM-QOS=1.1;CM-VER=3.0;

Cable Connection:

Startup Procedure

Procedure Status Comment Acquire Downstream Channel 855000000 Hz Locked Connectivity State OK Operational Boot State OK Operational Security Enabled BPI+ IP Provisioning Mode Honor MDD honorMdd(4)

Downstream Bonded Channels

Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables 1 Locked QAM256 22 855000000 Hz 9.8 dBmV 39.3 dB 0 0 2 Locked QAM256 1 729000000 Hz 10.5 dBmV 40.2 dB 0 0 3 Locked QAM256 2 735000000 Hz 9.9 dBmV 40 dB 0 0 4 Locked QAM256 3 741000000 Hz 9.9 dBmV 40 dB 0 0 5 Locked QAM256 4 747000000 Hz 9.8 dBmV 39.9 dB 0 0 6 Locked QAM256 5 753000000 Hz 10.4 dBmV 40 dB 0 0 7 Locked QAM256 6 759000000 Hz 10.7 dBmV 40.1 dB 0 0 8 Locked QAM256 7 765000000 Hz 10.7 dBmV 40 dB 0 0 9 Locked QAM256 8 771000000 Hz 11 dBmV 40 dB 0 0 10 Locked QAM256 9 777000000 Hz 11 dBmV 40 dB 0 0 11 Locked QAM256 10 783000000 Hz 10.9 dBmV 40 dB 0 0 12 Locked QAM256 11 789000000 Hz 10.9 dBmV 39.9 dB 0 0 13 Locked QAM256 12 795000000 Hz 10.9 dBmV 39.9 dB 0 0 14 Locked QAM256 13 801000000 Hz 10.9 dBmV 39.9 dB 0 0 15 Locked QAM256 14 807000000 Hz 10.6 dBmV 39.8 dB 0 0 16 Locked QAM256 15 813000000 Hz 10.4 dBmV 39.7 dB 0 0 17 Locked QAM256 16 819000000 Hz 10 dBmV 40.8 dB 0 0 18 Locked QAM256 17 825000000 Hz 10 dBmV 40.8 dB 0 0 19 Locked QAM256 18 831000000 Hz 10.1 dBmV 40.9 dB 0 0 20 Locked QAM256 19 837000000 Hz 9.9 dBmV 40.6 dB 0 0 21 Locked QAM256 20 843000000 Hz 9.8 dBmV 40.5 dB 0 0 22 Locked QAM256 21 849000000 Hz 9.9 dBmV 40.8 dB 0 0 23 Locked QAM256 23 861000000 Hz 9.1 dBmV 40.3 dB 0 0 24 Locked QAM256 24 867000000 Hz 9 dBmV 39.9 dB 0 0

Upstream Bonded Channels

Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 1 5120 Ksym/sec 38600000 Hz 38.1 dBmV 2 Locked ATDMA 2 5120 Ksym/sec 32200000 Hz 38.3 dBmV 3 Locked ATDMA 3 5120 Ksym/sec 25800000 Hz 38.3 dBmV 4 Locked TDMA and ATDMA 4 2560 Ksym/sec 21000000 Hz 38.3 dBmV 5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV

Current System Time:Thu Dec 29 23:02:57 2016

[ctpirn]

I have the C7000-100NAS as well and had simular results.

I fixed them but replacing exsiting cable with new RG6 cable and connectors rated to 1000MHz. and what helped the most improving upload speeds was using a 5-1005MHz spiltter with EMI shielding and wiring it to a proper earth ground if your cable drop isn't grounded when it comes into the house.

Try this

https://www.amazon.com/gp/product/B007YV0UQW/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

try hooking it up grounded and ungrounded and compare results.

It will also drop your power level down a bit which might not be a bad thing in your case.

Replace all splitters yearly or when performance slows! 

If all else fails have the cable company to install a new drop and have a line tech come out and adjust your neighboorhood cable power amps.