Symptoms

• Repeated T3 timeouts (never T4)

• OFDMA profile flapping between 10 ↔ 11 ↔ 12

• Occasional CCAP commanded power mismatch warnings

• Short upload freezes during noise bursts

• OFDMA always relocks afterward

• No downstream issues at all (SNR 40–41 dB, OFDM PLC 42–43 dB)

My upstream transmit power stays around 42.8–43.3 dBmV, so the modem isn’t struggling to reach the CMTS.

Timeline of Events (May 31 → June 2)

Evening Noise Window (19:00–23:30)

• Multiple T3 timeouts

• Heavy OFDMA profile changes

• Happens every night in the same window

Overnight Noise Window (01:00–03:00)

• More T3s

• Profile drops to 10

• CCAP power mismatch warnings

• Looks like return‑path ingress on the node

Morning Noise Window (06:00–07:00)

• A few T3s

• Profile flapping

• Possibly a device on the node powering on

Midday

• Everything clean

• No T3s

• OFDMA stable

• Upstream power steady

• Downstream perfect

This pattern repeats almost identically every day.

The cable is new from the drop directly to the modem using ppc connectors. I installed a PPC FPA6-54 last week.  Field techs have been sent to my home twice. On May 21st I was informed by a field tech that maintanace was informed and would come out that week. Yesterday and today I had to power reset my modem in the morning. 

Clean Event Log (MAC Addresses Removed)

06/02/2026 06:11:33 — Notice Successful LAN WebGUI login

06/02/2026 06:05:51 — Critical No Ranging Response received – T3 time‑out

06/02/2026 05:50:39 — Notice Successful LAN WebGUI login

06/02/2026 05:27:34 — Warning RNG‑RSP CCAP Commanded Power in Excess of 6 dB Below Top of DRW

06/02/2026 05:27:34 — Warning REG‑RSP‑MP Mismatch Between Calculated Value for P1.6hi and CCAP Value

06/02/2026 05:27:30 — Warning MIMO Event: Stored MIMO = –1, post‑cfg MIMO = –1

12/31/1969 16:00:51 — Notice US Diplexer Mode Change: [5–85 MHz]

12/31/1969 16:00:51 — Notice DS Diplexer Mode Change Ignored: [1002 MHz]

12/31/1969 16:00:51 — Notice DS Diplexer Mode Change Ignored: [258 MHz]

12/31/1969 16:00:51 — Notice US Diplexer Mode Change Ignored: [85 MHz]

12/31/1969 16:00:46 — Notice DS Diplexer Mode Initialization: [108–1002 MHz]

12/31/1969 16:00:46 — Notice US Diplexer Mode Initialization: [5–42 MHz]

06/02/2026 05:09:58 — Notice US profile assignment change (11 → 12)

06/02/2026 04:59:58 — Notice US profile assignment change (12 → 11)

06/02/2026 03:59:27 — Notice US profile assignment change (10 → 12)

06/02/2026 03:54:27 — Notice US profile assignment change (12 → 10)

06/02/2026 02:05:53 — Critical No Ranging Response received – T3 time‑out

06/02/2026 01:53:05 — Notice US profile config update

06/01/2026 22:49:59 — Critical No Ranging Response received – T3 time‑out

06/01/2026 22:16:57 — Notice US profile assignment change (10 → 12)

06/01/2026 22:08:57 — Notice US profile assignment change (11 → 10)

06/01/2026 22:01:57 — Notice US profile assignment change (11 → 12)

06/01/2026 21:56:57 — Notice US profile assignment change (12 → 11)

06/01/2026 21:36:57 — Notice US profile assignment change (11 → 12)

06/01/2026 21:28:27 — Notice US profile assignment change (10 → 11)

06/01/2026 20:36:42 — Notice US profile assignment change (11 → 12)

06/01/2026 20:21:42 — Notice US profile assignment change (11 → 12)

06/01/2026 20:16:42 — Notice US profile assignment change (10 → 11)

06/01/2026 20:12:57 — Notice US profile assignment change (12 → 10)

06/01/2026 20:01:42 — Notice US profile assignment change (11 → 12)

06/01/2026 19:53:12 — Notice US profile assignment change (10 → 11)

06/01/2026 19:44:27 — Notice US profile assignment change (12 → 11)

06/01/2026 19:36:42 — Notice US profile assignment change (11 → 12)

06/01/2026 19:27:12 — Notice US profile assignment change (12 → 11)

06/01/2026 19:16:42 — Notice US profile assignment change (11 → 12)

06/01/2026 19:08:42 — Notice US profile assignment change (12 → 11)

06/01/2026 18:56:42 — Notice US profile assignment change (11 → 12)

06/01/2026 18:47:27 — Notice US profile assignment change (12 → 11)

06/01/2026 18:38:27 — Notice US profile assignment change (12 → 11)

06/01/2026 18:03:24 — Critical No Ranging Response received – T3 time‑out

06/01/2026 17:05:27 — Notice CM‑STATUS message sent (Event Code 24)

06/01/2026 17:02:12 — Notice CM‑STATUS message sent (Event Code 16)

06/01/2026 17:02:06 — Notice DS profile config update (Channel 193)

06/01/2026 17:01:52 — Notice CM‑STATUS message sent (Event Code 16)

06/01/2026 17:01:49 — Notice DS profile config update (Channel 193)

06/01/2026 17:01:41 — Notice CM‑STATUS message sent (Event Code 16)

06/01/2026 17:01:33 — Notice DS profile config update (Channel 194)

06/01/2026 16:42:12 — Notice US profile assignment change (12 → 10)

06/01/2026 14:47:32 — Critical No Ranging Response received – T3 time‑out

06/01/2026 14:00:55 — Critical No Ranging Response received – T3 time‑out

06/01/2026 10:00:58 — Critical No Ranging Response received – T3 time‑out

06/01/2026 09:42:11 — Notice US profile assignment change (11 → 12)

06/01/2026 09:37:11 — Notice US profile assignment change (12 → 11)

06/01/2026 07:12:11 — Notice US profile assignment change (10 → 12)

06/01/2026 07:06:11 — Notice US profile assignment change (11 → 10)

06/01/2026 07:04:26 — Notice US profile assignment change (12 → 11)

06/01/2026 06:45:02 — Critical No Ranging Response received – T3 time‑out

06/01/2026 06:32:11 — Notice US profile assignment change (10 → 12)

06/01/2026 06:26:41 — Notice US profile assignment change (11 → 10)

06/01/2026 06:23:56 — Notice US profile assignment change (12 → 11)

06/01/2026 06:17:11 — Notice US profile assignment change (11 → 12)

06/01/2026 06:11:11 — Notice US profile assignment change (12 → 11)

06/01/2026 06:02:11 — Notice US profile assignment change (11 → 12)

06/01/2026 05:56:26 — Notice US profile assignment change (12 → 11)

06/01/2026 05:25:50 — Warning RNG‑RSP CCAP Commanded Power in Excess of 6 dB Below Top of DRW

06/01/2026 05:25:50 — Warning REG‑RSP‑MP Mismatch for P1.6hi

06/01/2026 05:25:46 — Warning MIMO Event: Stored MIMO = –1, post‑cfg MIMO = –1

12/31/1969 16:00:50 — Notice US Diplexer Mode Change: [5–85 MHz]

12/31/1969 16:00:50 — Notice DS Diplexer Mode Change Ignored: [1002 MHz]

12/31/1969 16:00:50 — Notice DS Diplexer Mode Change Ignored: [258 MHz]

12/31/1969 16:00:50 — Notice US Diplexer Mode Change Ignored: [85 MHz]

12/31/1969 16:00:45 — Notice DS Diplexer Mode Initialization: [108–1002 MHz]

12/31/1969 16:00:45 — Notice US Diplexer Mode Initialization: [5–42 MHz]

06/01/2026 02:06:13 — Notice US profile assignment change (12 → 10)

06/01/2026 01:58:32 — Critical No Ranging Response received – T3 time‑out

06/01/2026 01:56:13 — Notice US profile assignment change (11 → 12)

06/01/2026 01:52:58 — Notice US profile config update

06/01/2026 01:50:28 — Notice US profile assignment change (12 → 11)

06/01/2026 00:55:28 — Notice US profile assignment change (11 → 12)

06/01/2026 00:50:28 — Notice US profile assignment change (10 → 11)

06/01/2026 00:47:28 — Notice US profile assignment change (12 → 10)

06/01/2026 00:45:28 — Notice US profile assignment change (11 → 12)

06/01/2026 00:39:28 — Notice US profile assignment change (12 → 11)

05/31/2026 23:27:54 — Critical No Ranging Response received – T3 time‑out

05/31/2026 23:05:28 — Notice US profile assignment change (11 → 12)

05/31/2026 22:55:13 — Notice US profile assignment change (12 → 10)

05/31/2026 22:45:28 — Notice US profile assignment change (11 → 12)

05/31/2026 22:42:39 — Critical No Ranging Response received – T3 time‑out

05/31/2026 22:40:28 — Notice US profile assignment change (10 → 11)

05/31/2026 22:35:28 — Notice US profile assignment change (12 → 10)

05/31/2026 22:26:02 — Critical No Ranging Response received – T3 time‑out

05/31/2026 22:25:28 — Notice US profile assignment change (11 → 12)

05/31/2026 22:20:28 — Notice US profile assignment change (12 → 11)

05/31/2026 22:15:28 — Notice US profile assignment change (10 → 12)

05/31/2026 22:06:43 — Notice US profile assignment change (11 → 10)

05/31/2026 22:05:28 — Notice US profile assignment change (10 → 11)

05/31/2026 22:02:28 — Notice US profile assignment change (12 → 10)

05/31/2026 21:56:02 — Critical No Ranging Response received – T3 time‑out

05/31/2026 21:10:28 — Notice US profile assignment change (11 → 12)

05/31/2026 20:51:28 — Notice US profile assignment change (12 → 11)

The following from the status page is after having to power reset the modem this morning. 

Procedure	Status	Comment
Acquire Downstream Channel	405000000 Hz	Locked
Connectivity State	OK	Operational
Boot State	OK	Operational
Configuration File	OK
Security	Enabled	BPI+
DOCSIS Network Access Enabled	Allowed

Downstream Bonded Channels
Channel ID	Lock Status	Modulation	Frequency	Power	SNR/MER	Corrected	Uncorrectables
4	Locked	256QAM	405000000 Hz	-1.3 dBmV	40.9 dB	0	0
12	Locked	256QAM	453000000 Hz	-0.9 dBmV	40.9 dB	0	0
20	Locked	256QAM	501000000 Hz	-1.2 dBmV	40.9 dB	0	0
28	Locked	256QAM	549000000 Hz	-1.5 dBmV	40.9 dB	0	0
1	Locked	256QAM	387000000 Hz	-1.4 dBmV	40.4 dB	0	0
2	Locked	256QAM	393000000 Hz	-1.2 dBmV	40.4 dB	0	0
3	Locked	256QAM	399000000 Hz	-1.2 dBmV	40.4 dB	0	0
5	Locked	256QAM	411000000 Hz	-1.5 dBmV	40.9 dB	0	0
6	Locked	256QAM	417000000 Hz	-1.4 dBmV	40.9 dB	0	0
7	Locked	256QAM	423000000 Hz	-1.2 dBmV	40.9 dB	0	0
8	Locked	256QAM	429000000 Hz	-1.1 dBmV	40.9 dB	0	0
9	Locked	256QAM	435000000 Hz	-1.1 dBmV	40.9 dB	0	0
10	Locked	256QAM	441000000 Hz	-1.1 dBmV	40.4 dB	0	0
11	Locked	256QAM	447000000 Hz	-1.3 dBmV	40.4 dB	0	0
13	Locked	256QAM	459000000 Hz	-0.9 dBmV	40.4 dB	0	0
14	Locked	256QAM	465000000 Hz	-0.9 dBmV	40.9 dB	0	0
15	Locked	256QAM	471000000 Hz	-1.0 dBmV	40.9 dB	0	0
16	Locked	256QAM	477000000 Hz	-1.2 dBmV	40.9 dB	0	0
17	Locked	256QAM	483000000 Hz	-1.0 dBmV	40.4 dB	0	0
18	Locked	256QAM	489000000 Hz	-1.0 dBmV	40.9 dB	0	0
19	Locked	256QAM	495000000 Hz	-1.1 dBmV	40.4 dB	0	0
21	Locked	256QAM	507000000 Hz	-1.3 dBmV	40.4 dB	0	0
22	Locked	256QAM	513000000 Hz	-1.2 dBmV	40.4 dB	0	0
23	Locked	256QAM	519000000 Hz	-1.2 dBmV	40.9 dB	0	0
24	Locked	256QAM	525000000 Hz	-1.1 dBmV	40.4 dB	0	0
25	Locked	256QAM	531000000 Hz	-1.3 dBmV	40.9 dB	0	0
26	Locked	256QAM	537000000 Hz	-1.4 dBmV	40.9 dB	0	0
27	Locked	256QAM	543000000 Hz	-1.4 dBmV	40.4 dB	0	0
29	Locked	256QAM	555000000 Hz	-1.6 dBmV	40.9 dB	0	0
30	Locked	256QAM	561000000 Hz	-1.8 dBmV	40.4 dB	0	0
31	Locked	256QAM	567000000 Hz	-1.8 dBmV	40.9 dB	0	0
32	Locked	256QAM	573000000 Hz	-1.7 dBmV	40.4 dB	0	0
193	Locked	OFDM PLC	722000000 Hz	-1.8 dBmV	43.0 dB	2368900	0
194	Locked	OFDM PLC	957000000 Hz	-5.7 dBmV	42.0 dB	11550676	0

Upstream Bonded Channels
Channel ID	Lock Status	US Channel Type	Frequency	Width	Power
1	Locked	SC-QAM	16400000 Hz	6400000	42.8 dBmV
4	Locked	SC-QAM	35600000 Hz	6400000	42.8 dBmV
3	Locked	SC-QAM	29200000 Hz	6400000	42.8 dBmV
2	Locked	SC-QAM	22800000 Hz	6400000	42.8 dBmV
41	Locked	OFDMA	36200000 Hz	44400000	42.8 dBmV

Current System Time:06/02/2026 06:14:12