Multiple Daily Outages for ~5 Minutes Each - "No Ranging Response received"

I have Xfinity Gigabit Internet plan with a Netgear CM1200 modem. Every day, there is one or more network outage where there is no connectivity at all for about 5-10 minutes. It happens randomly with no specific pattern. I've verified that it isn't my home networking equipment as I've been connected wired directly to the modem and the issue still occurs.

The modem logs during the outage are copied below. There are multiple "Critical" type logs including "No Ranging Response received - T3 time-out" and "no Unicast Maintenance opportunities received - T4 time out". I've seen other posts similar to this where Comcast stepped into help. Hope that can happen here or others from the community can suggest what to do. Link aggregation (LACP) is disabled on the modem which is the only known related issue I could find related to CM1200.

Time	Priority	Description
Tue Jun 09 13:13:44 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:13:42 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1 2 3.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:12:33 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1 2.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:12:02 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1 2 3.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:11:59 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:11:38 2020	Notice (6)	DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:11:38 2020	Notice (6)	TLV-11 - unrecognized OID;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:11:25 2020	Notice (6)	Honoring MDD; IP provisioning mode = IPv6
Tue Jun 09 13:11:17 2020	Critical (3)	No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:11:02 2020	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:11:02 2020	Critical (3)	No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:11:02 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 22; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:11:01 2020	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:11:00 2020	Critical (3)	No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:10:59 2020	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:10:58 2020	Critical (3)	No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:10:54 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:10:53 2020	Critical (3)	No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:10:51 2020	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:10:44 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:09:44 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 20; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:09:34 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1 2 3.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:09:07 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:09:07 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:09:02 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:08:57 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:08:56 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:08:46 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1 3.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:08:46 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:08:36 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1 2 3.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:08:29 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:08:26 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1 2.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:08:24 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:08:15 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1 2.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:08:13 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:08:05 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1 2 3.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:07:54 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1 2.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:07:26 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:07:02 2020	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
Tue Jun 09 13:07:00 2020	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2.;CM-MAC=08:36:c9:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;

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Responses

Accepted Solution

EG

Expert

•

111.5K Messages

5 years ago

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

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.

EG

Expert

•

111.5K Messages

5 years ago

Please also post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.

ravishi

New Poster

•

3 Messages

5 years ago

Hi EG,

I copied the contents of the "Cable Connection" page below. Note that this capture is when the internet is working normally. Hope this helps.

Frequency start Value

This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.

Starting Frequency

Startup Procedure

Procedure	Status	Comment
Acquire Downstream Channel	603000000 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	36	603000000 Hz	1.1 dBmV	41.7 dB	19637	16623
2	Locked	QAM256	12	447000000 Hz	2.8 dBmV	43.2 dB	41262	26014
3	Locked	QAM256	13	453000000 Hz	3 dBmV	43.2 dB	32044	17698
4	Locked	QAM256	14	459000000 Hz	2.8 dBmV	43.2 dB	24604	19691
5	Locked	QAM256	15	465000000 Hz	2.7 dBmV	43.1 dB	39033	24726
6	Locked	QAM256	16	471000000 Hz	2.8 dBmV	43.1 dB	16373	13624
7	Locked	QAM256	17	477000000 Hz	2.4 dBmV	42.8 dB	33258	20579
8	Locked	QAM256	18	483000000 Hz	2.3 dBmV	42.8 dB	21817	15169
9	Locked	QAM256	19	489000000 Hz	2.4 dBmV	42.7 dB	18534	14196
10	Locked	QAM256	20	495000000 Hz	2 dBmV	42.7 dB	31317	24175
11	Locked	QAM256	21	507000000 Hz	2.6 dBmV	42.7 dB	21987	14338
12	Locked	QAM256	22	513000000 Hz	2.4 dBmV	42.4 dB	21632	16091
13	Locked	QAM256	23	519000000 Hz	2.3 dBmV	42.7 dB	17785	12435
14	Locked	QAM256	24	525000000 Hz	2.3 dBmV	42.5 dB	23390	16704
15	Locked	QAM256	25	531000000 Hz	2.1 dBmV	42.4 dB	19948	16279
16	Locked	QAM256	26	543000000 Hz	1.9 dBmV	42.5 dB	21536	17696
17	Locked	QAM256	27	549000000 Hz	2 dBmV	42.6 dB	16146	12917
18	Locked	QAM256	28	555000000 Hz	2.4 dBmV	42.7 dB	15366	14446
19	Locked	QAM256	29	561000000 Hz	1.9 dBmV	42.5 dB	21407	16572
20	Locked	QAM256	30	567000000 Hz	1.9 dBmV	42.5 dB	13990	11958
21	Locked	QAM256	31	573000000 Hz	1.7 dBmV	42.5 dB	19473	16207
22	Locked	QAM256	32	579000000 Hz	2.1 dBmV	42.6 dB	14775	13629
23	Locked	QAM256	33	585000000 Hz	2 dBmV	42.6 dB	19098	15012
24	Locked	QAM256	34	591000000 Hz	1.5 dBmV	42.4 dB	18509	16409
25	Locked	QAM256	35	597000000 Hz	1.2 dBmV	42.2 dB	15170	12995
26	Locked	QAM256	37	609000000 Hz	1.1 dBmV	42.2 dB	17271	14312
27	Locked	QAM256	38	615000000 Hz	1.1 dBmV	42.3 dB	11841	12458
28	Locked	QAM256	39	621000000 Hz	0.9 dBmV	42.1 dB	18003	16085
29	Locked	QAM256	40	627000000 Hz	0.7 dBmV	42 dB	14242	11750
30	Locked	QAM256	41	633000000 Hz	1.1 dBmV	42.1 dB	13831	13061
31	Locked	QAM256	42	639000000 Hz	1.7 dBmV	42.3 dB	21240	14115
32	Not Locked	Unknown	0	0 Hz	0.0 dBmV	0.0 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	17300000 Hz	47.5 dBmV
2	Locked	ATDMA	2	5120 Ksym/sec	23700000 Hz	47.5 dBmV
3	Locked	ATDMA	3	5120 Ksym/sec	30300000 Hz	47.8 dBmV
4	Locked	ATDMA	4	5120 Ksym/sec	36700000 Hz	48.5 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

Downstream OFDM Channels

Channel	Lock Status	Modulation / Profile ID	Channel ID	Frequency	Power	SNR / MER	Active Subcarrier Number Range	Unerrored Codewords	Correctable Codewords	Uncorrectable Codewords
1	Locked	0 ,1 ,2 ,3	48	688000000 Hz	0.8 dBmV	40.9 dB	1228 ~ 2867	1075905112	162391322	20458
2	Not Locked	0	0	0 Hz	0 dBmV	0.0 dB	0 ~ 4095	0	0	0

Upstream OFDMA Channels

Channel	Lock Status	Modulation / Profile ID	Channel ID	Frequency	Power
1	Not Locked	0	0	0 Hz	0 dBmV
2	Not Locked	0	0	0 Hz	0 dBmV

Extended Upstream Transmit Power

Enable Extended Upstream Transmit Power

Current System Time:Tue Jun 09 13:43:02 2020

System Up Time:2 days 17:13:01

ravishi

New Poster

•

3 Messages

5 years ago

Thanks EG! I'm in an apartment so I can't control all splitters on the line but I'm not using any inside the apartment. However, I reseated the connection to the modem and rebooted it. I'm not an expert on what I should be looking for but the downstream power is higher and the upstream power is lower. I pasted the updated "Cable Connection" output below. I'll keep an eye on any outages over the next couple days. If none, I'll come back and mark your reply as "Best Answer". Thanks for your help so far!

Frequency start Value

Starting Frequency

Startup Procedure

Procedure	Status	Comment
Acquire Downstream Channel	603000000 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	36	603000000 Hz	2 dBmV	41.8 dB	0	0
2	Locked	QAM256	12	447000000 Hz	4 dBmV	43.3 dB	0	0
3	Locked	QAM256	13	453000000 Hz	3.9 dBmV	43.4 dB	0	0
4	Locked	QAM256	14	459000000 Hz	3.9 dBmV	43.4 dB	0	0
5	Locked	QAM256	15	465000000 Hz	3.8 dBmV	43.3 dB	0	0
6	Locked	QAM256	16	471000000 Hz	3.7 dBmV	43.3 dB	0	0
7	Locked	QAM256	17	477000000 Hz	3.4 dBmV	43 dB	0	0
8	Locked	QAM256	18	483000000 Hz	3.3 dBmV	43 dB	0	0
9	Locked	QAM256	19	489000000 Hz	3.2 dBmV	42.9 dB	0	0
10	Locked	QAM256	20	495000000 Hz	3.1 dBmV	42.9 dB	0	0
11	Locked	QAM256	21	507000000 Hz	3.4 dBmV	42.9 dB	0	0
12	Locked	QAM256	22	513000000 Hz	3.4 dBmV	42.8 dB	0	0
13	Locked	QAM256	23	519000000 Hz	3.1 dBmV	42.9 dB	0	0
14	Locked	QAM256	24	525000000 Hz	3.1 dBmV	42.8 dB	0	0
15	Locked	QAM256	25	531000000 Hz	3.1 dBmV	42.7 dB	0	0
16	Locked	QAM256	26	543000000 Hz	2.9 dBmV	42.7 dB	0	0
17	Locked	QAM256	27	549000000 Hz	3 dBmV	42.9 dB	0	0
18	Locked	QAM256	28	555000000 Hz	3 dBmV	43 dB	0	0
19	Locked	QAM256	29	561000000 Hz	2.9 dBmV	42.9 dB	0	0
20	Locked	QAM256	30	567000000 Hz	2.8 dBmV	42.8 dB	0	0
21	Locked	QAM256	31	573000000 Hz	2.7 dBmV	42.8 dB	0	0
22	Locked	QAM256	32	579000000 Hz	3.1 dBmV	42.8 dB	0	0
23	Locked	QAM256	33	585000000 Hz	3 dBmV	42.8 dB	0	0
24	Locked	QAM256	34	591000000 Hz	2.7 dBmV	42.7 dB	0	0
25	Locked	QAM256	35	597000000 Hz	2.2 dBmV	42.4 dB	0	0
26	Locked	QAM256	37	609000000 Hz	2.2 dBmV	42.4 dB	0	0
27	Locked	QAM256	38	615000000 Hz	2.2 dBmV	42.5 dB	0	0
28	Locked	QAM256	39	621000000 Hz	2.1 dBmV	42.4 dB	0	0
29	Locked	QAM256	40	627000000 Hz	1.8 dBmV	42.2 dB	0	0
30	Locked	QAM256	41	633000000 Hz	2.1 dBmV	42.3 dB	0	0
31	Locked	QAM256	42	639000000 Hz	2.9 dBmV	42.6 dB	0	0
32	Not Locked	Unknown	0	0 Hz	0.0 dBmV	0.0 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	17300000 Hz	46.3 dBmV
2	Locked	ATDMA	2	5120 Ksym/sec	23700000 Hz	46 dBmV
3	Locked	ATDMA	3	5120 Ksym/sec	30300000 Hz	46.5 dBmV
4	Locked	ATDMA	4	5120 Ksym/sec	36700000 Hz	47.3 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

Downstream OFDM Channels

Channel	Lock Status	Modulation / Profile ID	Channel ID	Frequency	Power	SNR / MER	Active Subcarrier Number Range	Unerrored Codewords	Correctable Codewords	Uncorrectable Codewords
1	Locked	0 ,1 ,2 ,3	48	688000000 Hz	1.8 dBmV	41.3 dB	1228 ~ 2867	16958472	2639300	397
2	Not Locked	0	0	0 Hz	0 dBmV	0.0 dB	0 ~ 4095	0	0	0

Upstream OFDMA Channels

Channel	Lock Status	Modulation / Profile ID	Channel ID	Frequency	Power
1	Not Locked	0	0	0 Hz	0 dBmV
2	Not Locked	0	0	0 Hz	0 dBmV

Extended Upstream Transmit Power

Enable Extended Upstream Transmit Power

Current System Time:Tue Jun 09 15:31:33 2020

System Up Time:00:36:39

EG

Expert

•

111.5K Messages

5 years ago

These are the desired Comcast specs from the troubleshooting tips sticky topic at the top of the board;

Specification	Min	Max
Downstream Power Level
Cable Modems	-10dBmV	+10dBmV
Gateways and EMTAs	-7dBmV	+7dBmV
Downstream Signal to Noise Ratio	35dB	-
Upstream Power Level	+35dBmV	+50dBmV
Upstream Signal to Noise Ratio	31dB	-
Upstream Receive Power	-2dBmV	+2dBmV

Mac_guru

New Poster

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1 Message

5 years ago

So when I check my cable settings, My download are all < 1

Is this cause for concern? I am losing packets, and have also seen the "No Ranging response received" message, although not as frequently.

Thanks!

Downstream Bonded Channels

Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR	Correctables	Uncorrectables
1	Locked	QAM256	29	633000000 Hz	0.1 dBmV	39.6 dB	0	0
2	Locked	QAM256	13	537000000 Hz	0.8 dBmV	39.6 dB	0	0
3	Locked	QAM256	14	543000000 Hz	0.9 dBmV	39.7 dB	0	0
4	Locked	QAM256	15	549000000 Hz	0.9 dBmV	39.8 dB	0	0
5	Locked	QAM256	16	555000000 Hz	1 dBmV	39.8 dB	0	0
6	Locked	QAM256	17	561000000 Hz	0.9 dBmV	39.5 dB	0	0
7	Locked	QAM256	18	567000000 Hz	0.9 dBmV	39.9 dB	0	0
8	Locked	QAM256	19	573000000 Hz	0.9 dBmV	39.9 dB	0	0
9	Locked	QAM256	20	579000000 Hz	0.7 dBmV	39.8 dB	0	0
10	Locked	QAM256	21	585000000 Hz	0.7 dBmV	39.7 dB	0	0
11	Locked	QAM256	22	591000000 Hz	0.6 dBmV	39.7 dB	0	0
12	Locked	QAM256	23	597000000 Hz	0.8 dBmV	39.8 dB	0	0
13	Locked	QAM256	24	603000000 Hz	0.7 dBmV	39.7 dB	0	0

Your Home Network

ravishi

Multiple Daily Outages for ~5 Minutes Each - "No Ranging Response received"

EG

EG

ravishi

ravishi

EG

Mac_guru

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