Intermittent disconnects

[gp-se]

---

@CWolfCW wrote:

Mississauga (Dundas/Winston Churchill)

So the past few weeks, my housemates and I have been getting random disconnects from the modem. I've tried without my router, resetting the modem, connecting from a separate jack... to no avail. I'm hoping for advice as to what might be the issue.

No.	Time	Type	Priority	Event
1	02/14/2018 22:43:50	82000200	critical	No Ranging Response received - T3 time-out;CMTS-MAC=00:17:10:93:72:23;CM-QOS=1.1;CM-VER=3.1;
2	02/15/2018 00:18:59	68010300	error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-QOS=1.1;CM-VER=3.1;
3	02/15/2018 00:45:15	90000000	warning	MIMO Event MIMO: Stored MIMO=1 post cfg file MIMO=-1;CM-QOS=1.1;CM-VER=3.1;
4	02/16/2018 23:27:24	82000200	critical	No Ranging Response received - T3 time-out;CMTS-MAC=00:17:10:93:72:23;CM-QOS=1.1;CM-VER=3.1;
5	02/17/2018 03:41:02	90000000	warning	MIMO Event MIMO: Stored MIMO=1 post cfg file MIMO=-1;CM-QOS=1.1;CM-VER=3.1;
6	02/18/2018 03:41:00	68010300	error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-QOS=1.1;CM-VER=3.1;
7	02/18/2018 17:43:56	84020200	warning	Lost MDD Timeout;CM-QOS=1.1;CM-VER=3.1;
8	02/21/2018 03:41:01	68010300	error	DHCP RENEW WARNING - Field invalid in response v4 option;CMTS-MAC=00:17:10:93:72:23;CM-QOS=1.1;CM-VER=3.1;
9	02/21/2018 15:52:24	82000200	critical	No Ranging Response received - T3 time-out;CMTS-MAC=00:17:10:93:72:23;CM-QOS=1.1;CM-VER=3.1;
10	02/25/2018 03:41:02	68010300	error	DHCP RENEW WARNING - Field invalid in response v4 option;;CMTS-MAC=00:17:10:93:72:23;CM-QOS=1.1;CM-VER=3.1;
11	02/25/2018 12:44:34	82000200	critical	No Ranging Response received - T3 time-out;CMTS-MAC=00:17:10:93:72:23;CM-QOS=1.1;CM-VER=3.1;
12	02/26/2018 03:41:02	68010300	error	DHCP RENEW WARNING - Field invalid in response v4 option;CMTS-MAC=00:17:10:93:72:23;CM-QOS=1.1;CM-VER=3.1;
13	02/27/2018 00:35:08	84000500	critical	SYNC Timing Synchronization failure - Loss of Sync;CMTS-MAC=00:17:10:93:72:23;CM-QOS=1.1;CM-VER=3.1;
14	02/27/2018 00:35:16	84020200	warning	Lost MDD Timeout;CMTS-MAC=00:17:10:93:72:23;CM-QOS=1.1;CM-VER=3.1;
15	02/27/2018 03:41:02	68010300	error	DHCP RENEW WARNING - Field invalid in response v4 option;CMTS-MAC=00:17:10:93:72:23;CM-QOS=1.1;CM-VER=3.1;

DOCSIS WAN

This menu displays both upstream and downstream signal parameters

DOCSIS Overview

Network Access	Permitted
Subnet Mask	255.255.240.0
DHCP Lease Time	😧 07 H: 00 M: 00 S: 00

Downstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Signal noise ratio (dB)
1	603000000	256QAM	6.700	9	40.366
2	849000000	256QAM	4.000	2	40.946
3	855000000	256QAM	3.100	3	40.366
4	861000000	256QAM	2.900	4	40.366
5	579000000	256QAM	6.300	5	40.366
6	585000000	256QAM	5.800	6	40.366
7	591000000	256QAM	4.600	7	40.366
8	597000000	256QAM	5.400	8	40.366
9	303000000	256QAM	7.200	1	40.366
10	609000000	256QAM	4.900	10	40.366
11	615000000	256QAM	5.600	11	40.946
12	621000000	256QAM	6.300	12	40.946
13	633000000	256QAM	4.100	13	40.946
14	639000000	256QAM	5.800	14	40.946
15	645000000	256QAM	4.600	15	40.366
16	651000000	256QAM	3.600	16	40.946
17	657000000	256QAM	5.000	17	40.366
18	663000000	256QAM	5.400	18	40.366
19	669000000	256QAM	3.900	19	40.946
20	675000000	256QAM	4.900	20	40.366
21	681000000	256QAM	5.200	21	40.366
22	687000000	256QAM	3.400	22	40.366
23	693000000	256QAM	3.500	23	38.983
24	699000000	256QAM	4.500	24	40.366
25	705000000	256QAM	4.400	25	40.946
26	711000000	256QAM	3.800	26	40.366
27	717000000	256QAM	5.300	27	40.366
28	723000000	256QAM	3.900	28	40.946
29	825000000	256QAM	5.500	29	40.946
30	831000000	256QAM	5.000	30	40.366
31	837000000	256QAM	5.000	31	40.946
32	843000000	256QAM	4.600	32	40.366

OFDM Downstream Overview

Receiver	FFT type	Subcarr 0 Frequency(MHz)	PLC locked	NCP locked	MDC1 locked	PLC power(dBmv)
0	NA	NA	NO	NO	NO	NA
1	4K	290600000	YES	YES	YES	7.500000

Upstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Bandwidth
1	38596000	ATDMA - 64QAM	34.250	3	3200000
2	30596000	ATDMA - 64QAM	30.750	1	6400000
3	23700000	ATDMA - 64QAM	30.250	2	6400000

OFDM/OFDMA Overview

Channel Index	State	lin Digital Att	Digital Att	BW (sc's*fft)	Report Power	Report Power1_6	FFT Size
0	DISABLED	0.5000	0.0000	0.0000	-inf	-1.0000	4K
1	DISABLED	0.5000	0.0000	0.0000	-inf	-1.0000	4K

---

@CWolfCW

Your signal levels look good, but all those errors look like it could be an issue with the CMTS. I suggest calling Rogers and ask them to check other people on your Node for any issues. It could be a Node/CMTS issue.

[Ghost314]

@Datalink

As you might expect, plugging the modem directly into the wall socket did not improve things, I'm still getting randomly disconnected. The following is the information I observed while the connection was down. I included all tables as there appears to be nothing in them worth hiding.

DOCSIS Overview

Network Access	Process...
IP Address	0.0.0.0
Subnet Mask
Gateway IP Address
DHCP Lease Time	😧 -- H: -- M: -- S: --

Downstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Signal noise ratio (dB)
1	603000000	256QAM	2.800	9	36.610
5	579000000	256QAM	3.300	0	9.680
6	585000000	256QAM	3.100	0	9.818
7	591000000	256QAM	2.700	0	9.943
9	603000000	256QAM	2.800	0	10.078
10	609000000	256QAM	3.600	0	13.200

OFDM Downstream Overview

Receiver	FFT type	Subcarr 0 Frequency(MHz)	PLC locked	NCP locked	MDC1 locked	PLC power(dBmv)
0	NA	NA	NO	NO	NO	NA
1	NA	NA	NO	NO	NO	NA

Upstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Bandwidth
1	30596000	ATDMA - 64QAM	37.750	1	6400000

OFDM/OFDMA Overview

Channel Index	State	lin Digital Att	Digital Att	BW (sc's*fft)	Report Power	Report Power1_6	FFT Size
0	DISABLED	0.5000	0.0000	0.0000	-inf	-1.0000	4K
1	DISABLED	0.5000	0.0000	0.0000	-inf	-1.0000	4K

The next set of tables is from when the connection was back up, I ommitted some tables that looked like they had info that might let someone identify me:

Downstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Signal noise ratio (dB)
1	603000000	256QAM	2.700	9	36.610
2	849000000	256QAM	2.000	2	34.926
3	855000000	256QAM	1.900	3	35.084
4	861000000	256QAM	2.200	4	35.084
5	579000000	256QAM	3.300	5	36.610
6	585000000	256QAM	3.100	6	36.610
7	591000000	256QAM	2.600	7	36.387
8	597000000	256QAM	2.400	8	36.387
9	303000000	256QAM	-1.500	1	37.636
10	609000000	256QAM	3.600	10	37.356
11	615000000	256QAM	3.000	11	36.387
12	621000000	256QAM	2.600	12	36.610
13	633000000	256QAM	3.500	13	37.356
14	639000000	256QAM	4.000	14	37.356
15	645000000	256QAM	3.600	15	36.610
16	651000000	256QAM	3.400	16	36.610
17	657000000	256QAM	3.200	17	36.610
18	663000000	256QAM	3.900	18	37.356
19	669000000	256QAM	4.100	19	37.356
20	675000000	256QAM	3.400	20	36.610
21	681000000	256QAM	2.800	21	36.387
22	687000000	256QAM	3.000	22	36.387
23	693000000	256QAM	3.100	23	36.610
24	699000000	256QAM	3.300	24	36.387
25	705000000	256QAM	2.600	25	35.780
26	711000000	256QAM	2.300	26	35.780
27	717000000	256QAM	3.000	27	36.387
28	723000000	256QAM	3.400	28	36.387
29	825000000	256QAM	1.500	29	35.084
30	831000000	256QAM	1.800	30	35.084
31	837000000	256QAM	2.000	31	35.084
32	843000000	256QAM	1.700	32	35.084

OFDM Downstream Overview

Receiver	FFT type	Subcarr 0 Frequency(MHz)	PLC locked	NCP locked	MDC1 locked	PLC power(dBmv)
0	NA	NA	NO	NO	NO	NA
1	4K	290600000	YES	YES	YES	-0.599998

Upstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Bandwidth
1	38596000	ATDMA - 64QAM	45.750	6	3200000
2	30596000	ATDMA - 64QAM	42.500	4	6400000
3	23700000	ATDMA - 64QAM	40.500	5	6400000

OFDM/OFDMA Overview

Channel Index	State	lin Digital Att	Digital Att	BW (sc's*fft)	Report Power	Report Power1_6	FFT Size
0	DISABLED	0.5000	0.0000	0.0000	-inf	-1.0000	4K
1	DISABLED	0.5000	0.0000	0.0000	-inf	-1.0000	4K

[Datalink]

@Ghost314 did you reboot the modem to get it back to a working state, or did the modem reboot on its own?  

Your downstream DOCSIS 3.0 signal levels are ok, as are the signal to noise ratios, the upstream DOCSIS 3.0 signal levels are above the normal levels for this modem (when its running DOCSIS 3.1 on the downstream side).  The upstream levels are still within spec, but, their above the usual 31 to 33 dBmV levels.  That indicates that there is either a cable issue, or perhaps an MDU/CMTS issue.  Typically, in a house installation, as the external cable fails, the modem upstream output increases until the modem hits 51 dBmV for three channel operation.  If the CMTS calls for more power from the modem, the modem will shut down one channel, and run the other two channels with higher power levels.  If that still doesn't work, the modem will shut down another channel, resulting in single channel upstream operation.  When you're in a dual and single channel mode, you will notice it as the data rates will drop.  I wouldn't expect the same for an apartment unless the apartments were connected to an external CMTS, where the cabling is exposed to the elements.  Thats why I was indicating that it would be good to know what your modem is connected to, an internal MDU, or external CMTS.  That also determines what level of tech is required to sort out the problem. 

In any event, when you get a drop in service, you should call in to tech support and at the very least log the event on file.  Get enough of those events, and it will gain attention.  Put tech support on speed dial and don't hesitate to use it.  

[juched]

Hello,

I have been getting disconnects with my Rogers 150u account since I converted in November.  I changed my modem out 2 weeks ago for a white DOCSIS 3.1 one (CODA).  I noticed the same error that occurs on the new modem as the old one when my Internet temporarily disconnects:

03/05/2018 23:31:30

90000000

warning

MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;

Here are my current modem details from the web page.  The colour items are the one constant I can always see which matches up with my internet disconnect time (adjust 5 hours for timezone).

DOCSIS Logs

The DOCSIS event logs is shown here

No.	Time	Type	Priority	Event
1	03/05/2018 23:29:18	82000200	critical	No Ranging Response received - T3 time-out;CM-MAC=90:50:ca:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;
2	03/05/2018 23:29:19	84000500	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=90:50:ca:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;
3	03/05/2018 23:29:24	82000200	critical	No Ranging Response received - T3 time-out;CM-MAC=90:50:ca:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;
4	03/05/2018 23:29:25	82000300	critical	Ranging Request Retries exhausted;CM-MAC=90:50:ca:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;
5	03/05/2018 23:29:25	82000600	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=90:50:ca:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;
6	03/05/2018 23:29:32	82000200	critical	No Ranging Response received - T3 time-out;CM-MAC=90:50:ca:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;
7	03/05/2018 23:29:33	82000300	critical	Ranging Request Retries exhausted;CM-MAC=90:50:ca:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;
8	03/05/2018 23:29:33	82000600	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=90:50:ca:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;
9	03/05/2018 23:29:58	82000400	critical	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=90:50:ca:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;
10	03/05/2018 23:30:23	90000000	warning	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=90:50:ca:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;
11	03/05/2018 23:30:53	82000200	critical	No Ranging Response received - T3 time-out;CM-MAC=90:50:ca:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;
12	03/05/2018 23:30:54	82000300	critical	Ranging Request Retries exhausted;CM-MAC=90:50:ca:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;
13	03/05/2018 23:30:54	82000600	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=90:50:ca:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;
14	03/05/2018 23:30:54	82000300	critical	Ranging Request Retries exhausted;CM-MAC=90:50:ca:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;
15	03/05/2018 23:30:54	82000600	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=90:50:ca:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;
16	03/05/2018 23:31:01	82000200	critical	No Ranging Response received - T3 time-out;CM-MAC=90:50:ca:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;
17	03/05/2018 23:31:02	82000300	critical	Ranging Request Retries exhausted;CM-MAC=90:50:ca:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;
18	03/05/2018 23:31:02	82000600	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=90:50:ca:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;
19	03/05/2018 23:31:30	90000000	warning	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=90:50:ca:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;
20	03/05/2018 23:33:23	82000200	critical	No Ranging Response received - T3 time-out;CM-MAC=90:50:ca:xx:xx:xx;CMTS-MAC=00:17:10:90:e4:83;CM-QOS=1.1;CM-VER=3.1;

DOCSIS WAN

This menu displays both upstream and downstream signal parameters

DOCSIS Overview

Network Access	Permitted
IP Address	7.x.x.x
Subnet Mask	255.255.240.0
Gateway IP Address	7.x.x.x
DHCP Lease Time	😧 06 H: 23 M: 58 S: 54

Downstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Signal noise ratio (dB)
1	615000000	256QAM	0.600	11	37.356
2	849000000	256QAM	-3.400	2	36.387
3	855000000	256QAM	-3.300	3	36.387
4	861000000	256QAM	-2.700	4	36.387
5	579000000	256QAM	0.100	5	36.610
6	585000000	256QAM	0.500	6	37.356
7	591000000	256QAM	0.400	7	36.610
8	597000000	256QAM	0.600	8	37.356
9	603000000	256QAM	1.000	9	37.356
10	609000000	256QAM	1.100	10	37.356
11	303000000	256QAM	-1.000	1	36.387
12	621000000	256QAM	0.200	12	37.356
13	633000000	256QAM	0.100	13	37.356
14	639000000	256QAM	0.500	14	36.610
15	645000000	256QAM	1.000	15	37.356
16	651000000	256QAM	1.500	16	37.356
17	657000000	256QAM	1.500	17	37.356
18	663000000	256QAM	1.700	18	36.610
19	669000000	256QAM	2.400	19	37.636
20	675000000	256QAM	2.100	20	37.356
21	681000000	256QAM	1.800	21	36.610
22	687000000	256QAM	1.100	22	36.610
23	693000000	256QAM	0.200	23	36.610
24	699000000	256QAM	-0.100	24	36.610
25	705000000	256QAM	-0.600	25	37.636
26	711000000	256QAM	-1.300	26	36.610
27	717000000	256QAM	-1.500	27	36.387
28	723000000	256QAM	-1.100	28	36.610
29	825000000	256QAM	1.200	29	37.356
30	831000000	256QAM	-0.800	30	36.610
31	837000000	256QAM	-2.700	31	36.610
32	843000000	256QAM	-3.300	32	36.387

OFDM Downstream Overview

Receiver	FFT type	Subcarr 0 Frequency(MHz)	PLC locked	NCP locked	MDC1 locked	PLC power(dBmv)
0	NA	NA	NO	NO	NO	NA
1	4K	290600000	YES	YES	YES	-0.299999

Upstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Bandwidth
1	30596000	ATDMA - 64QAM	34.750	1	6400000
2	38596000	ATDMA - 64QAM	38.750	3	3200000
3	23700000	ATDMA - 64QAM	34.000	2	6400000

OFDM/OFDMA Overview

Channel Index	State	lin Digital Att	Digital Att	BW (sc's*fft)	Report Power	Report Power1_6	FFT Size
0	DISABLED	0.5000	0.0000	0.0000	-inf	-1.0000	4K
1	DISABLED	0.5000	0.0000	0.0000	-inf	-1.0000	4K

Nothing looks particularly off, and the speed is great.  Just these disconnects keep happening and I want to know what to push for when I call tech support.

When I called and changed my modem they said my area was clean and my internet connection looked solid, but they did admit it was odd to have these errors in my logs.   New modem was step one to see if it was invovled.  My old modem was a black one and I have had it for a couple years without issue.  

This seems to have occured after changing from 100u to 150u package.

Thank you!

***Edited: Removed CM MAC address***

[RogersTony]

Hello @juched,

Thanks for your post and welcome to the Rogers Community Forums!

These type of intermittent disconnects can get super annoying over time especially if it ends up interrupting important work you are doing online. =(

The signal levels you provided look great everything seems to be in order so these disconnects are very odd! Does it always happen at the same time or does it happen randomly but always with that error in your event logs? Do you have your modem connected to power via a power bar or is it connected directly to the outlet?

Keep us posted!

RogersTony

[juched]

Hello and thank you.

This doesn’t happen at the same time it randomly. Sometimes it takes days and other times it happens multiple times in one day.

When it does happen I check the logs and see the MiMo message.

The cable modem is plugged in to a battery UPS and wasn’t a problem for 2 years until I changed to 150u. Odd.

[RogersZia]

Hello @juched,

Thanks for the update! We may need to escalate a ticket to our engineering teams to investigate this fully and see what is causing this issue. We'd also like to run a few tests on our end and may have a few followup questions once everything has been tested out on our end.

We'll need to gain access to your account to get started on this. Please send us a Private Message @CommunityHelps so we can take a closer look. For more information on our private Messaging system please Click Here.

We look forward to hearing from you !

RogersZia

[ddragon]

Internet signal cutting out every 15-20 minutes for 1-2 minutes

Anyone experiencing their internet cutting out every 15-20 minutes for a few minutes? It started in the last few weeks. I have my computer plugged right into the rogers modem for fast speed but now I get cutoff very now and then. When I do I check the modem and all the lights are on and working.

I also have BELL internet in the house for the kids. I don’t think Rogers is worth it for $105.08 a month for 100u service if they can’t even keep it going for longer than 15 minutes. If it doesn’t get fixed I plan on cancelling. It’s my last Rogers service and I’ll never go back.

[Datalink]

@ddragon have you called tech support to report the issue?  That sounds like the external cable is failing.  It would be much easier if it simply failed, as it would make troubleshooting much easier.  If you can get thru to tech support while the internet service is out, that is the best time to call.  It sounds like the modem is probably rebooting, attempting to reestablish communications with the Cable Modem Termination System (CMTS).  If so, you might not have time to contact tech support, but, its worth trying, and you should definitely report this to tech support.  Put them on speed dial and don't hesitate to use it.  In the mean time, can you log into the modem, navigate to the STATUS .... DOCSIS WAN tab, copy the Downstream and Upstream table and paste that into a post.  The copy and paste process will paste in the text contents of the table.  Ignore the data that sits above the Downstream table as that modem specific and shouldn't be posted in an open forum.

Are you aware that Bell is rolling out symmetrical service?  Looks like their current internet users are seeing upgrades in speeds as well as implementation of symmetrical download/upload rates, without any notice to the upgraded users.  Fwiw......

http://www.dslreports.com/forum/r31862917-Internet-Symmetrical-speed-is-back

[Claranon]

Ottawa (Nepean)

I've been having issues with intermittent disconnecting several times a day for the past few weeks. My modem model name is CGN3ACSMR and I live in a detached house. The disconnects happens on Wifi as well as Ethernet-connected devices. It always comes back up within a couple minutes so I never have time to call support to see what it looks like on their end. I had a similar problem six months ago and swapped the modem and things were good for a while, but now they've started getting bad again. I rarely use cable TV but a few times in the past couple weeks I've noticed pixellation of the signal, although I haven't found any correlation between that and the disconnects.

Any help would be much appreciated (in fact, the Internet just went down again right when I tried to post this the first time!). Here are my downstream/upstream overviews:

Downstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Signal noise ratio (dB)
1	621000000	256QAM	3.700	12	40.366
2	579000000	256QAM	2.600	5	40.366
3	585000000	256QAM	1.900	6	40.366
4	591000000	256QAM	1.900	7	40.366
5	597000000	256QAM	2.300	8	40.366
6	603000000	256QAM	2.400	9	40.366
7	609000000	256QAM	2.400	10	40.366
8	615000000	256QAM	3.500	11	40.946
9	303000000	256QAM	1.800	1	40.366
10	633000000	256QAM	4.400	13	40.366
11	639000000	256QAM	4.400	14	40.366
12	645000000	256QAM	3.800	15	40.946
13	651000000	256QAM	3.900	16	40.366
14	657000000	256QAM	3.800	17	40.366
15	663000000	256QAM	3.700	18	40.946
16	669000000	256QAM	4.400	19	40.946
17	675000000	256QAM	3.800	20	40.366
18	681000000	256QAM	3.400	21	40.366
19	687000000	256QAM	4.200	22	40.946
20	693000000	256QAM	4.300	23	40.946
21	699000000	256QAM	3.900	24	40.366
22	705000000	256QAM	4.200	25	40.946
23	711000000	256QAM	4.800	26	40.946
24	717000000	256QAM	4.900	27	40.366

Upstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Bandwidth
1	30596000	ATDMA - 64QAM	44.750	1	6400000
2	38596000	ATDMA - 64QAM	45.250	3	3200000
3	23700000	ATDMA - 64QAM	45.000	2	6400000