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Motorola SB6141 Dropping Internet Connection Multiples Times A Day

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Motorola SB6141 Dropping Internet Connection Multiples Times A Day

Within the last few weeks, my Motorola SB6141 modem has begun dropping it's connection multiple times a day. Logging into the modem, it shows that it is encountering a T3 timeout with "no ranging response received". All of the connections are tight at the wall and on the mode, There is a single splitter that splits the signal to the cable box and the modem. Last year, a Comcast tech came out and completely changed out the line from the box at the street to the house, so that should not be the problem. I am trying to figure out whether this may be a modem issue and it needs to be replaced (it is going on 7 years old), or if I need to have a Comcast tech come out again (which would not be preferred under current circumstances unless all of the work needs to be done outside). Below are the logs and signal from the modem itself:

Time

Priority

Code

Message

Oct 24 2020 12:21:13

3-Critical

R02.0

No Ranging Response received - T3 time-out;CM-MAC=b8:16:19:f7:45:f2;CMTS-MAC=00:01:5c:69:18:78;CM-QOS=1.1;CM-VER=3.0;

Oct 24 2020 11:14:13

3-Critical

R06.0

Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=b8:16:19:f7:45:f2;CMTS-MAC=00:01:5c:69:18:78;CM-QOS=1.1;CM-VER=3.0;

Oct 24 2020 11:14:13

3-Critical

R03.0

Ranging Request Retries exhausted;CM-MAC=b8:16:19:f7:45:f2;CMTS-MAC=00:01:5c:69:18:78;CM-QOS=1.1;CM-VER=3.0;

Oct 24 2020 11:14:13

3-Critical

R02.0

No Ranging Response received - T3 time-out;CM-MAC=b8:16:19:f7:45:f2;CMTS-MAC=00:01:5c:69:18:78;CM-QOS=1.1;CM-VER=3.0;

Oct 24 2020 11:14:06

3-Critical

R06.0

Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=b8:16:19:f7:45:f2;CMTS-MAC=00:01:5c:69:18:78;CM-QOS=1.1;CM-VER=3.0;

Oct 24 2020 11:14:06

3-Critical

R03.0

Ranging Request Retries exhausted;CM-MAC=b8:16:19:f7:45:f2;CMTS-MAC=00:01:5c:69:18:78;CM-QOS=1.1;CM-VER=3.0;

Oct 24 2020 11:14:06

3-Critical

R02.0

No Ranging Response received - T3 time-out;CM-MAC=b8:16:19:f7:45:f2;CMTS-MAC=00:01:5c:69:18:78;CM-QOS=1.1;CM-VER=3.0;

Oct 24 2020 10:58:18

5-Warning

Z00.0

MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=b8:16:19:f7:45:f2;CMTS-MAC=00:01:5c:69:18:78;CM-QOS=1.1;CM-VER=3.0;

Jan 01 1970 00:06:00

3-Critical

R02.0

No Ranging Response received - T3 time-out;CM-MAC=b8:16:19:f7:45:f2;CMTS-MAC=00:01:5c:69:18:78;CM-QOS=1.1;CM-VER=3.0;

Jan 01 1970 00:05:35

3-Critical

R04.0

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b8:16:19:f7:45:f2;CMTS-MAC=00:01:5c:69:18:78;CM-QOS=1.1;CM-VER=3.0;

Jan 01 1970 00:04:43

3-Critical

R02.0

No Ranging Response received - T3 time-out;CM-MAC=b8:16:19:f7:45:f2;CMTS-MAC=00:01:5c:69:18:78;CM-QOS=1.1;CM-VER=3.0;

Jan 01 1970 00:04:34

3-Critical

R04.0

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b8:16:19:f7:45:f2;CMTS-MAC=00:01:5c:69:18:78;CM-QOS=1.1;CM-VER=3.0;

Jan 01 1970 00:03:43

3-Critical

R02.0

No Ranging Response received - T3 time-out;CM-MAC=b8:16:19:f7:45:f2;CMTS-MAC=00:01:5c:69:18:78;CM-QOS=1.1;CM-VER=3.0;

Jan 01 1970 00:03:34

3-Critical

R04.0

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b8:16:19:f7:45:f2;CMTS-MAC=00:01:5c:69:18:78;CM-QOS=1.1;CM-VER=3.0;

Jan 01 1970 00:02:37

3-Critical

R02.0

No Ranging Response received - T3 time-out;CM-MAC=b8:16:19:f7:45:f2;CMTS-MAC=00:01:5c:69:18:78;CM-QOS=1.1;CM-VER=3.0;

Jan 01 1970 00:02:23

3-Critical

R04.0

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b8:16:19:f7:45:f2;CMTS-MAC=00:01:5c:69:18:78;CM-QOS=1.1;CM-VER=3.0;

Jan 01 1970 00:01:31

3-Critical

R02.0

No Ranging Response received - T3 time-out;CM-MAC=b8:16:19:f7:45:f2;CMTS-MAC=00:01:5c:69:18:78;CM-QOS=1.1;CM-VER=3.0;

Jan 01 1970 00:01:22

3-Critical

R04.0

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b8:16:19:f7:45:f2;CMTS-MAC=00:01:5c:69:18:78;CM-QOS=1.1;CM-VER=3.0;

Jan 01 1970 00:00:25

3-Critical

R02.0

No Ranging Response received - T3 time-out;CM-MAC=b8:16:19:f7:45:f2;CMTS-MAC=00:01:5c:69:18:78;CM-QOS=1.1;CM-VER=3.0;

Jan 01 1970 00:00:17

6-Notice

N/A

Cable Modem Reboot due to power reset ;CM-MAC=b8:16:19:f7:45:f2;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;

 

Downstream

Bonding Channel Value

Channel ID

33

34

35

36

37

38

39

40

Frequency

627000000 Hz

633000000 Hz

639000000 Hz

645000000 Hz

651000000 Hz

657000000 Hz

663000000 Hz

669000000 Hz

Signal to Noise Ratio

38 dB

38 dB

38 dB

38 dB

37 dB

38 dB

38 dB

37 dB

Downstream Modulation

QAM256

QAM256

QAM256

QAM256

QAM256

QAM256

QAM256

QAM256

Power Level

-3 dBmV

-3 dBmV

-3 dBmV

-5 dBmV

-5 dBmV

-4 dBmV

-5 dBmV

-5 dBmV

The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading

 

Upstream

Bonding Channel Value

Channel ID

5

8

7

6

Frequency

35600000 Hz

16400000 Hz

22800000 Hz

29200000 Hz

Ranging Service ID

9299

9299

9299

9299

Symbol Rate

5.120 Msym/sec

5.120 Msym/sec

5.120 Msym/sec

5.120 Msym/sec

Power Level

51 dBmV

49 dBmV

50 dBmV

51 dBmV

Upstream Modulation

[2] QPSK

[1] 32QAM

[3] 64QAM

[2] QPSK

[1] 32QAM

[3] 64QAM

[2] QPSK

[1] 32QAM

[3] 64QAM

[2] QPSK

[1] 32QAM

[3] 64QAM

Ranging Status

Success

Success

Success

Success

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Expert

Re: Motorola SB6141 Dropping Internet Connection Multiples Times A Day

The upstream power is too high and it may be intermittently fluctuating even higher out of spec. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

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.

 

If nothing above applies, then bear in mind that if the premises facing techs can not find or fix a problem at your home, it is they who are responsible for escalating it to their line / network / maintenance dept. techs. The problem may lie beyond your home in the local neighborhood infrastructure somewhere but it is their S.O.P. to start at the home.
Good luck !



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