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4 Messages

09/13/2026 5:45 PM

Arris S33v2 cable modem disconnecting everyday

I've tried calling 1-800-Xfinity and talking to AI assistant, then finally talking to a person, who told me to replace the ethernet cord between my cable modem and my router. I did this, but it did not help. Now I've found the xfinity forums and I'm hoping technical support still exists at this company. After briefly reading some other posts on the forum, I logged into my modem's web interface and below is the error log from the cable modem.


What should I try next? Thanks in advance.

Date Time

Event Level

Description

12/9/2026
13:32:40

3

CMSTATUS:US_Diplexer_Mode_Change:TLV-21.1, 5-85MHz.

12/9/2026
13:32:55

3

No Ranging Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

12/9/2026
13:32:58

6

Honoring MDD; IP provisioning mode = IPv6

12/9/2026
13:33:07

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-84.2, 108MHz.

12/9/2026
13:33:07

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-84.3, 1002MHz.

12/9/2026
13:33:07

3

CMSTATUS:US_Diplexer_Mode_Change:TLV-84.1, 5-42MHz.

12/9/2026
13:33:09

6

DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

12/9/2026
13:33:10

6

DS profile assignment change. DS Chan ID: 33; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

12/9/2026
13:33:17

3

UCD invalid or channel unusable;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

12/9/2026
14:09:33

3

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

12/9/2026
14:10:27

3

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

12/9/2026
14:10:32

3

No Ranging Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

12/9/2026
14:10:32

3

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

12/9/2026
14:10:32

3

No Ranging Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

12/9/2026
14:10:33

3

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

12/9/2026
14:10:40

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-21.2, 258MHz.

12/9/2026
14:10:40

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-21.3, 1002MHz.

12/9/2026
14:10:41

3

CMSTATUS:US_Diplexer_Mode_Change:TLV-21.1, 5-85MHz.

12/9/2026
14:10:46

3

No Ranging Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

12/9/2026
14:10:50

6

Honoring MDD; IP provisioning mode = IPv6

12/9/2026
14:10:58

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-84.2, 108MHz.

12/9/2026
14:10:58

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-84.3, 1002MHz.

12/9/2026
14:10:59

3

CMSTATUS:US_Diplexer_Mode_Change:TLV-84.1, 5-42MHz.

12/9/2026
14:11:00

6

DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

12/9/2026
14:11:02

6

DS profile assignment change. DS Chan ID: 33; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

12/9/2026
14:11:09

3

UCD invalid or channel unusable;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
02:42:35

3

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
02:43:30

3

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
02:43:31

3

No Ranging Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
02:43:33

3

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
02:43:35

3

No Ranging Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
02:43:35

3

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
02:43:42

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-21.2, 258MHz.

13/9/2026
02:43:42

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-21.3, 1002MHz.

13/9/2026
02:43:42

3

CMSTATUS:US_Diplexer_Mode_Change:TLV-21.1, 5-85MHz.

13/9/2026
02:43:49

3

No Ranging Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
02:43:52

6

Honoring MDD; IP provisioning mode = IPv6

13/9/2026
02:44:01

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-84.2, 108MHz.

13/9/2026
02:44:01

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-84.3, 1002MHz.

13/9/2026
02:44:03

3

CMSTATUS:US_Diplexer_Mode_Change:TLV-84.1, 5-42MHz.

13/9/2026
02:44:04

6

DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
02:44:05

6

DS profile assignment change. DS Chan ID: 33; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
02:44:13

3

UCD invalid or channel unusable;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
04:43:19

3

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
04:49:48

6

CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
04:49:53

6

CM-STATUS message sent. Event Type Code: 16; Chan ID: 193 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
04:50:13

6

CM-STATUS message sent. Event Type Code: 16; Chan ID: 193 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
04:51:08

3

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
04:52:06

3

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
04:52:07

3

No Ranging Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
04:52:08

3

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
04:52:14

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-21.2, 258MHz.

13/9/2026
04:52:14

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-21.3, 1002MHz.

13/9/2026
04:52:15

3

CMSTATUS:US_Diplexer_Mode_Change:TLV-21.1, 5-85MHz.

13/9/2026
04:52:19

3

No Ranging Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
04:52:25

6

Honoring MDD; IP provisioning mode = IPv6

13/9/2026
04:52:33

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-84.2, 108MHz.

13/9/2026
04:52:33

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-84.3, 1002MHz.

13/9/2026
04:52:34

3

CMSTATUS:US_Diplexer_Mode_Change:TLV-84.1, 5-42MHz.

13/9/2026
04:52:35

6

DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
04:52:36

6

DS profile assignment change. DS Chan ID: 33; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
04:52:44

3

UCD invalid or channel unusable;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
07:28:21

3

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
07:28:22

6

CM-STATUS message sent. Event Type Code: 16; Chan ID: 193 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
07:35:02

6

CM-STATUS message sent. Event Type Code: 24; Chan ID: 193 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
07:59:55

3

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
08:08:00

6

CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
08:09:34

3

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
08:10:34

3

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
08:10:41

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-21.2, 258MHz.

13/9/2026
08:10:41

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-21.3, 1002MHz.

13/9/2026
08:10:42

3

CMSTATUS:US_Diplexer_Mode_Change:TLV-21.1, 5-85MHz.

13/9/2026
08:10:48

3

No Ranging Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
08:10:51

6

Honoring MDD; IP provisioning mode = IPv6

13/9/2026
08:11:00

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-84.2, 108MHz.

13/9/2026
08:11:00

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-84.3, 1002MHz.

13/9/2026
08:11:00

3

CMSTATUS:US_Diplexer_Mode_Change:TLV-84.1, 5-42MHz.

13/9/2026
08:11:02

6

DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
08:11:03

6

DS profile assignment change. DS Chan ID: 33; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
08:11:09

3

UCD invalid or channel unusable;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
09:58:24

3

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
09:59:12

3

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
09:59:21

3

No Ranging Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
09:59:24

3

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
09:59:31

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-21.2, 258MHz.

13/9/2026
09:59:31

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-21.3, 1002MHz.

13/9/2026
09:59:32

3

CMSTATUS:US_Diplexer_Mode_Change:TLV-21.1, 5-85MHz.

13/9/2026
09:59:39

3

No Ranging Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
09:59:44

6

Honoring MDD; IP provisioning mode = IPv6

13/9/2026
09:59:52

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-84.2, 108MHz.

13/9/2026
09:59:52

3

CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-84.3, 1002MHz.

13/9/2026
09:59:53

3

CMSTATUS:US_Diplexer_Mode_Change:TLV-84.1, 5-42MHz.

13/9/2026
09:59:54

6

DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
09:59:56

6

DS profile assignment change. DS Chan ID: 33; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
10:00:02

3

UCD invalid or channel unusable;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
10:54:44

3

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
10:54:48

6

CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
10:58:13

6

CM-STATUS message sent. Event Type Code: 24; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=[Edited: “Personal Information”];CMTS-MAC=[Edited: “Personal Information”];CM-QOS=1.1;CM-VER=3.1;

13/9/2026
11:22:35

3

Failed LAN WebGUI login attempt from [Edited: “Personal Information”]on 26/09/13 at 11:22 AM.

13/9/2026
11:22:39

3

Successful LAN WebGUI login from [Edited: “Personal Information”]on 26/09/13 at 11:22 AM.

 

Question

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Updated 

7 minutes ago

 • Edited

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user_zxz72x

Visitor

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4 Messages

4 hours ago

Not sure if this is helpful additional information, but here is the channel info. 

Downstream Bonded Channels
Channel ID Lock Status Modulation Frequency Power SNR/MER Corrected Uncorrectables
36 Locked QAM256 591000000 Hz 7 dBmV 42 dB 17959 20501
13 Locked QAM256 453000000 Hz 6 dBmV 42 dB 21585 25177
14 Locked QAM256 459000000 Hz 6 dBmV 43 dB 20912 24872
15 Locked QAM256 465000000 Hz 6 dBmV 42 dB 19047 21516
16 Locked QAM256 471000000 Hz 6 dBmV 42 dB 19923 23262
17 Locked QAM256 477000000 Hz 6 dBmV 42 dB 19511 23035
18 Locked QAM256 483000000 Hz 6 dBmV 42 dB 19486 21469
19 Locked QAM256 489000000 Hz 6 dBmV 43 dB 19009 21698
20 Locked QAM256 495000000 Hz 6 dBmV 43 dB 19260 21617
21 Locked QAM256 501000000 Hz 6 dBmV 42 dB 18420 20481
22 Locked QAM256 507000000 Hz 6 dBmV 42 dB 18295 20145
23 Locked QAM256 513000000 Hz 6 dBmV 42 dB 18019 19796
24 Locked QAM256 519000000 Hz 6 dBmV 42 dB 18064 19561
25 Locked QAM256 525000000 Hz 6 dBmV 42 dB 17761 19233
26 Locked QAM256 531000000 Hz 6 dBmV 42 dB 17155 18683
27 Locked QAM256 537000000 Hz 6 dBmV 42 dB 16947 18654
28 Locked QAM256 543000000 Hz 6 dBmV 42 dB 17128 18243
29 Locked QAM256 549000000 Hz 6 dBmV 42 dB 16491 17686
30 Locked QAM256 555000000 Hz 6 dBmV 42 dB 16581 17341
31 Locked QAM256 561000000 Hz 6 dBmV 42 dB 16390 17358
32 Locked QAM256 567000000 Hz 6 dBmV 42 dB 16242 16431
33 Locked QAM256 573000000 Hz 7 dBmV 42 dB 16351 16736
34 Locked QAM256 579000000 Hz 6 dBmV 42 dB 15896 16579
35 Locked QAM256 585000000 Hz 6 dBmV 42 dB 15415 16023
37 Locked QAM256 597000000 Hz 6 dBmV 42 dB 15565 15813
38 Locked QAM256 603000000 Hz 6 dBmV 42 dB 15574 15106
39 Locked QAM256 609000000 Hz 6 dBmV 42 dB 15463 14832
40 Locked QAM256 615000000 Hz 7 dBmV 42 dB 14979 15162
41 Locked QAM256 621000000 Hz 7 dBmV 42 dB 14648 14607
42 Locked QAM256 627000000 Hz 7 dBmV 42 dB 14870 14182
43 Locked QAM256 633000000 Hz 7 dBmV 42 dB 14500 14682
44 Locked QAM256 639000000 Hz 7 dBmV 42 dB 14139 13475
193 Locked OFDM PLC 690000000 Hz 6 dBmV 42 dB 3613317050 27327
194 Locked OFDM PLC 957000000 Hz 6 dBmV 41 dB 447676755 2358


Upstream Bonded Channels
Channel ID Lock Status US Channel Type Frequency Width Power
1 Locked SC-QAM 16400000 Hz 6400000 45.3 dBmV
2 Locked SC-QAM 22800000 Hz 6400000 46.3 dBmV
3 Locked SC-QAM 29200000 Hz 6400000 46.0 dBmV
4 Locked SC-QAM 35600000 Hz 6400000 46.5 dBmV


Current System Time:Sun Sep 13 11:54:50 2026

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XfinityDuron

Official Employee

 • 

1K Messages

1 hour ago

Can you share with me the exact issue you are having at this time?

4

0

user_zxz72x

Visitor

 • 

4 Messages

The cable modem disconnects from internet multiple times per day, everyday. 

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51 minutes ago

0

XfinityDuron

Official Employee

 • 

1K Messages

Are you currently using a Xfinity modem or a personal modem for your services?

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please mark as Best Answer.tick

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38 minutes ago

0

user_zxz72x

Visitor

 • 

4 Messages

personal modem, Arris S33v2

(edited)

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34 minutes ago

0

XfinityAldrik

Official Employee

 • 

2.7K Messages

Thank you for confirming that @user_zxz72x! I’d like to take a deeper look at the signals the modem is receiving and send some other troubleshooting signals to the modem. One step we may want to try is swapping out the modem for a different one or one of our rental wireless gateways to see if the issue happens on other modems. 

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7 minutes ago

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BruceW

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22 minutes ago

... here is the channel info ...

The signal levels and SNR values posted look OK, but the number of Uncorrectables is way too high, unless these figures are over a very long period of time. Does the modem report "Uptime"?

If you want to troubleshoot this yourself, please see Internet Troubleshooting Tips. If you can't find the problem or you'd rather have Comcast/Xfinity take care of it and an employee does not respond to your message here, call them at the phone number on your bill or 1-800-Comcast, or use one of the options on https://www.xfinity.com/support/contact-us/. It's not likely they can fix the problem remotely. If not, insist they send a tech out to identify the cause and correct it.

If the tech finds bad coax, splitters, amplifiers, or connections in your home (even if Comcast/Xfinity originally supplied them) you'll probably have to pay for the visit (approx $100) unless you have their Service Protection Plan ( https://www.xfinity.com/support/articles/service-protection-plan, closed to customers that don't already have it). If the trouble is due to a faulty Comcast rental device or anything outside your home you shouldn't be charged.

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