Xfinity Support

"Hello. My gateway is registering a severe downstream signal overflow (Power Level at +22 dBmV and SNR collapsed to 27 dB), but my upstream is normal at 41 dBmV. This is a local network/plant infrastructure issue affecting the neighborhood tap, not my house. Please do not schedule an in-home technician. Please escalate this directly to local line maintenance to balance the neighborhood tap/amplifier."

Note this is happening at night some time after 11:30pm, did this on 10/13/2026 and 10/14/2026

Downstream	Channel Bonding Value
Channel ID	38	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	33	34	35	36	39	40	41	37
Lock Status	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Not locked	Not locked	Not locked	Not locked	Not locked	Not locked	Not locked	Locked	Locked	Locked	Locked	Not locked	Not locked	Not locked	Not locked	Locked	Not locked	Locked	Locked	Locked	Locked	Locked	Locked
Frequency	339 MHz	387 MHz	393 MHz	399 MHz	405 MHz	411 MHz	417 MHz	423 MHz	429 MHz	435 MHz	441 MHz	447 MHz	453 MHz	459 MHz	465 MHz	471 MHz	477 MHz	483 MHz	489 MHz	495 MHz	507 MHz	513 MHz	519 MHz	525 MHz	363 MHz	369 MHz	375 MHz	381 MHz	345 MHz	351 MHz	357 MHz	630000000
SNR	35.9 dB	29.6 dB	30.3 dB	30.6 dB	30.7 dB	30.9 dB	30.7 dB	29.6 dB	28.2 dB	0.0 dB	0.0 dB	0.0 dB	0.0 dB	0.0 dB	0.0 dB	0.0 dB	28.5 dB	29.7 dB	30.0 dB	29.3 dB	0.0 dB	0.0 dB	0.0 dB	0.0 dB	27.4 dB	0.0 dB	27.6 dB	28.5 dB	33.7 dB	30.3 dB	28.4 dB	25.5 dB
Power Level	22.5 dBmV	14.5 dBmV	15.6 dBmV	16.0 dBmV	16.3 dBmV	16.9 dBmV	17.0 dBmV	16.0 dBmV	14.3 dBmV	12.7 dBmV	11.3 dBmV	10.6 dBmV	10.3 dBmV	10.5 dBmV	11.3 dBmV	12.6 dBmV	14.2 dBmV	16.0 dBmV	16.8 dBmV	16.4 dBmV	13.0 dBmV	11.8 dBmV	11.1 dBmV	10.7 dBmV	11.2 dBmV	10.9 dBmV	11.5 dBmV	12.9 dBmV	19.1 dBmV	15.2 dBmV	12.4 dBmV	15.8 dBmV
Modulation	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	Unknown	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	OFDM

*Channel ID 38 is the Primary channel

Upstream	Channel Bonding Value
Channel ID	1	2	3	4	5	6
Lock Status	Locked	Locked	Locked	Locked	Locked	Locked
Frequency	10 MHz	16 MHz	22 MHz	29 MHz	35 MHz	39 MHz
Symbol Rate	2560	5120	5120	5120	5120	1280
Power Level	42.0 dBmV	42.3 dBmV	42.3 dBmV	40.8 dBmV	40.8 dBmV	41.0 dBmV
Modulation	QAM	QAM	QAM	QAM	QAM	QAM
Channel Type	ATDMA	ATDMA	ATDMA	ATDMA	ATDMA	ATDMA

CM Error Codewords
Channel ID	38	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	33	34	35	36	37	39	40	41
Unerrored Codewords	67051285	140662995	148116862	148615407	148720916	149400239	148554050	137610995	55389371	912944	29	0	0	0	60	773152	46739526	125867145	137797971	115274771	27998	0	0	0	6176677	3504910	14657391	87132772	119929333	151193902	149348015	67051285
Correctable Codewords	77958445	10219067	2753272	2283956	2161946	1515000	2367140	13313737	88922581	8138374	0	0	0	0	0	22399102	92648129	25095462	13198238	35655699	1799534	0	0	0	60410437	43275249	82801529	62919029	14498924	2545	1856777	77958445
Uncorrectable Codewords	6106618	1323	10	6	6	1	9	2576	6535435	6955511	0	0	0	0	0	54319996	11417518	28654	1565	70457	6032920	0	0	0	43492647	40292083	47878026	1143316	102360915	0	4	6106618

Modem Stats

Modem Status:Connected

Your Home Network

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Xfinity Support

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