Cable signal levels - only 2 locked upstream channels

On chat with tech trying to sell me new plan for over an hour. He does not understand signal levels.

Old Netgear C7000 modem intermittent. Out for up to 6 hrs.

Downstream might be a little high. Only 2 channels lock on upstream. New Netgear CAX30 modem from Amazon - web GUI shows Cable Diagnostic poor. Upstream status orange.

Removed active splitter from circuit. Outside cable directly connected to modem cable at junction box in basement.

Suspect outdoor cable or hardware problem but don't want another tech to come here and tell me it is inside cable problem and charge fee...

Are these levels below as shown in the modem OK?:

<tabindex=-1>Downstream Bonded Channels</tabindex=-1>

Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR	Correctables	Uncorrectabables
1	Locked	256 QAM	1	507000000 Hz	13.0 dBmV	42.8 dB	0	0
2	Locked	256 QAM	2	513000000 Hz	12.7 dBmV	42.7 dB	0	0
3	Locked	256 QAM	3	519000000 Hz	12.2 dBmV	42.5 dB	0	0
4	Locked	256 QAM	4	525000000 Hz	12.2 dBmV	42.5 dB	0	0
5	Locked	256 QAM	5	531000000 Hz	12.2 dBmV	42.4 dB	0	0
6	Locked	256 QAM	6	537000000 Hz	12.7 dBmV	42.6 dB	0	0
7	Locked	256 QAM	7	543000000 Hz	12.4 dBmV	42.4 dB	0	0
8	Locked	256 QAM	8	549000000 Hz	12.0 dBmV	42.4 dB	0	0
9	Locked	256 QAM	9	555000000 Hz	11.9 dBmV	42.3 dB	0	0
10	Locked	256 QAM	10	561000000 Hz	11.9 dBmV	42.2 dB	0	0
11	Locked	256 QAM	11	567000000 Hz	11.8 dBmV	42.2 dB	0	0
12	Locked	256 QAM	12	573000000 Hz	11.8 dBmV	42.2 dB	0	0
13	Locked	256 QAM	13	579000000 Hz	12.1 dBmV	42.3 dB	0	0
14	Locked	256 QAM	14	585000000 Hz	11.7 dBmV	42.1 dB	0	0
15	Locked	256 QAM	15	591000000 Hz	11.7 dBmV	42.2 dB	0	0
16	Locked	256 QAM	16	597000000 Hz	11.3 dBmV	42.0 dB	0	0
17	Locked	256 QAM	17	603000000 Hz	10.9 dBmV	41.8 dB	0	0
18	Locked	256 QAM	18	609000000 Hz	11.1 dBmV	42.1 dB	0	0
19	Locked	256 QAM	19	615000000 Hz	11.2 dBmV	42.0 dB	0	0
20	Locked	256 QAM	20	621000000 Hz	11.2 dBmV	42.0 dB	0	0
21	Locked	256 QAM	21	627000000 Hz	10.6 dBmV	41.7 dB	0	0
22	Locked	256 QAM	22	633000000 Hz	10.4 dBmV	41.6 dB	0	0
23	Locked	256 QAM	23	639000000 Hz	10.6 dBmV	41.8 dB	0	0
24	Locked	256 QAM	24	645000000 Hz	10.8 dBmV	41.8 dB	0	0
25	Locked	256 QAM	25	651000000 Hz	11.0 dBmV	42.0 dB	0	0
26	Locked	256 QAM	26	657000000 Hz	10.9 dBmV	41.9 dB	0	0
27	Locked	256 QAM	27	663000000 Hz	10.9 dBmV	41.8 dB	0	0
28	Locked	256 QAM	28	669000000 Hz	10.8 dBmV	41.8 dB	0	0
29	Locked	256 QAM	29	675000000 Hz	10.4 dBmV	41.1 dB	0	0
30	Locked	256 QAM	30	681000000 Hz	10.3 dBmV	41.7 dB	0	0
31	Locked	256 QAM	31	687000000 Hz	10.4 dBmV	41.6 dB	0	0
32	Not Locked	Unknown	0	0 Hz	0.0 dBmV	0.0 dB	0	0

<tabindex=-1>Upstream Bonded Channels (Partial Service)</tabindex=-1>

Channel	Lock Status	US Channel Type	Channel ID	Symbol Rate	Frequency	Power
1	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0 dBmV
2	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0 dBmV
3	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0 dBmV
4	Locked	ATDMA	17	2560 Ksym/sec	35600000 Hz	40.8 dBmV
5	Locked	ATDMA	18	2560 Ksym/sec	40400000 Hz	40.0 dBmV
6	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0 dBmV
7	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0 dBmV
8	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0 dBmV

<tabindex=-1>Downstream OFDM Channels</tabindex=-1>

Channel	Channel ID	Frequency	Power	SNR/MER	Active Subcarrier Number Range	Total Codewords	Uncorrectable Codewords
1	33	780000000 Hz	8.1 dBmV	39.5 dB	1108 ~ 2987	1567449	0
2	0	0 Hz	0 dBmV	0 dB	0 ~ 0	0	0

<tabindex=-1>Upstream OFDMA Channels</tabindex=-1>

Channel	UpstreamIsMuted	Ranging Status	Subcarrier Zero Frequency	Active Subcarrier Number Range	Symbols Per Frame	Tx Power
1		Other	0 MHz	0 ~ 0	0	0 dBmV
2		Other	0 MHz	0 ~ 0	0	0 dBmV

Extended Upstream Transmit Power

Enable Extended Upstream Transmit Power

Current System Time: 2025-01-28 20:16:54

System Up Time: 00:16:25

Responses

XfinityDemitrius

Official Employee

•

1.8K Messages

3 months ago

Hey @wledena, Thank you for visiting our official Xfinity Forums Community support page. We greatly appreciate you taking the time to share your experience regarding the Xfinity Internet connectivity issues. I would be more than happy to offer my assistance looking into this further for you.

Thank you very much for posting the statistics of the modem. Most of bonded channels are within specification or slightly out. Are you experiencing more of a slow connection or intermittent connection when using the CAX30 modem?

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W

wledena

2 Messages

I thought the downstream were ok. Maybe a little high which you would not think would be a problem but high levels can overdrive circuits. Th problem was the upstream. Nothing to do with the modem in the end. Tech came out and said he was going to check the cables. Disappeared up the street and when he came back modem GUI was all green. Suspect he switched us to another port on the node. He still wanted to come in and check our cabling but no improvement after that. Has been good for a couple of days. We will see but leaning towards Verizon Fios.

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3 months ago

0

XfinityDemitrius

Official Employee

•

1.8K Messages

I am glad to hear you are not experiencing issues @wledena. Sounds like you had a recent In-Home Service Visit to have someone take a look. With everything working as intended, would there happen to be anything more we could assist you with to help make your experience an even better one?

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 a reply as the Accepted Answer. tick

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 a reply as the Accepted Answer. tick

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3 months ago

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EG

Expert

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109.9K Messages

3 months ago

@wledena

For curiosity, would you please post what the signal status values look like now ?

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Your Home Network

wledena

Cable signal levels - only 2 locked upstream channels

XfinityDemitrius

wledena

XfinityDemitrius

EG

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