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Forum Discussion
modem CAX80
Hello,
I installed a NetGear Nighthawk AX8 AX6000 WiFi Cable Modem/Router DOCSIS 3.1 CAX80,Firmware Version V2.1.1.4, I have Xfinity/Comcast, plan is 1200mbps upload, 35mbps upload. Having trouble with upload speed. Download speed is running around 800mbps, upload is running at around 4 to 5mbps. Have reset to defaults, have been in chat with tech, have been on the phone with tech, nobody knows why download is so low.
7 Replies
Do you have a screen snip of the cable connections page and the event logs?
That helps check the signal from the ISP.
How are you testing speeds? hardwired in? over wireless?
Cable Connection
Cancel Apply
Frequency start Value
This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.
Starting Frequency 651000000Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 651 MHz Locked
Connectivity State OK Operational
Boot State OK Operational
Security Enabled BPI+
Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked 256 QAM 30 651000000 Hz 1.8 dBmV 42.5 dB 0 0
2 Locked 256 QAM 2 489000000 Hz 0.0 dBmV 42.6 dB 0 0
3 Locked 256 QAM 3 495000000 Hz 0.4 dBmV 42.8 dB 0 0
4 Locked 256 QAM 4 501000000 Hz 0.6 dBmV 42.8 dB 0 0
5 Locked 256 QAM 5 507000000 Hz 0.6 dBmV 42.8 dB 0 0
6 Locked 256 QAM 6 513000000 Hz 0.5 dBmV 42.6 dB 0 0
7 Locked 256 QAM 7 519000000 Hz 0.5 dBmV 42.7 dB 0 0
8 Locked 256 QAM 8 525000000 Hz 0.3 dBmV 42.6 dB 0 0
9 Locked 256 QAM 9 531000000 Hz 0.3 dBmV 42.6 dB 0 0
10 Locked 256 QAM 10 537000000 Hz 0.4 dBmV 42.6 dB 0 0
11 Locked 256 QAM 11 543000000 Hz 0.4 dBmV 42.5 dB 0 0
12 Locked 256 QAM 12 549000000 Hz 0.6 dBmV 42.6 dB 0 0
13 Locked 256 QAM 13 555000000 Hz 0.4 dBmV 42.6 dB 0 0
14 Locked 256 QAM 14 561000000 Hz 0.5 dBmV 42.6 dB 0 0
15 Locked 256 QAM 15 567000000 Hz 0.5 dBmV 42.5 dB 0 0
16 Locked 256 QAM 16 573000000 Hz 0.6 dBmV 42.5 dB 0 0
17 Locked 256 QAM 17 579000000 Hz 0.5 dBmV 42.3 dB 0 0
18 Locked 256 QAM 18 585000000 Hz 0.3 dBmV 42.4 dB 0 0
19 Locked 256 QAM 19 591000000 Hz 0.4 dBmV 42.4 dB 0 0
20 Locked 256 QAM 20 597000000 Hz 0.6 dBmV 42.4 dB 0 0
21 Locked 256 QAM 21 603000000 Hz 0.7 dBmV 42.5 dB 0 0
22 Locked 256 QAM 22 609000000 Hz 0.9 dBmV 42.5 dB 0 0
23 Locked 256 QAM 23 615000000 Hz 1.2 dBmV 42.7 dB 0 0
24 Locked 256 QAM 24 621000000 Hz 1.5 dBmV 42.6 dB 0 0
25 Locked 256 QAM 26 627000000 Hz 1.7 dBmV 42.6 dB 0 0
26 Locked 256 QAM 27 633000000 Hz 1.3 dBmV 42.5 dB 0 0
27 Locked 256 QAM 28 639000000 Hz 1.4 dBmV 42.5 dB 0 0
28 Locked 256 QAM 29 645000000 Hz 1.5 dBmV 42.6 dB 0 0
29 Locked 256 QAM 31 657000000 Hz 1.9 dBmV 42.6 dB 0 0
30 Locked 256 QAM 32 663000000 Hz 2.0 dBmV 42.6 dB 0 0
31 Locked 256 QAM 33 669000000 Hz 1.8 dBmV 42.6 dB 0 0
32 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 7 5120 Ksym/sec 22800000 Hz 38.5 dBmV
2 Locked ATDMA 5 5120 Ksym/sec 35600000 Hz 38.0 dBmV
3 Locked ATDMA 6 5120 Ksym/sec 29200000 Hz 38.8 dBmV
4 Locked ATDMA 8 5120 Ksym/sec 16400000 Hz 38.5 dBmV
5 Locked ATDMA 10 1280 Ksym/sec 39600000 Hz 44.3 dBmV
6 Not Locked Unknown 0 0 0 0.0 dBmV
7 Not Locked Unknown 0 0 0 0.0 dBmV
8 Not Locked Unknown 0 0 0 0.0 dBmVDownstream OFDM Channels
Channel Lock
Status Modulation /
Profile ID Channel
ID Frequency Power SNR /
MER Active Subcarrier
Number Range Unerrored
Codewords Correctable
Codewords Uncorrectable
Codewords
1 Locked 0 ,1 ,2 ,3 37 690000000 Hz 1.88 dBmV 42.2 dB 1228 ~ 2867 360442197 331514059 0
2 Not Locked 0 0 0 Hz 0 dBmV 0 dB 0 ~ 4095 0 0 0
Upstream OFDMA Channels
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power
1 Not Locked 0 0 0 Hz 0 dBmV
2 Not Locked 0 0 0 Hz 0 dBmV
Extended Upstream Transmit Power is checked
Current System Time:Fri Jun 04 08:12:56 2021
System Up Time:12:07:43makes it hard to read when you post it like that. Next time get a screen snip. easier to read.
Do you also have you logs?
Any amplifiers/splitters/signal attenuators in your line?
Tested speeds from wireless as well as wired, tested from 7 different machines. All have about the same upload 5.9gbps max. The original modem from comcast was running at over 40gbps just prior to replacing, my plan calls for 1200 download and 35 upload. Thanks
