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c7000v2 - The upstream power too high / out of spec for Comcast

SysopChris3
Luminary

c7000v2 - The upstream power too high / out of spec for Comcast

I made a post to the Comcast community concerning random disconnects on WiFi & ethernet.

https://forums.xfinity.com/t5/Your-Home-Network/Netgear-AC1900-C7000v2-Firmware-Ver-V1-03-01-Random/... 

 

I uploaded my screenshots to Google Photos.
https://photos.app.goo.gl/Cn6kQGPTfg7dRVxw7 

 

This was the reply: The upstream power too high / out of spec for Comcast.

 

Specification Min Max

Downstream Power Level
Cable Modems -10dBmV +10dBmV
Gateways and EMTAs -7dBmV +7dBmV
Downstream Signal to Noise Ratio 35dB -
Upstream Power Level +35dBmV +50dBmV
Upstream Signal to Noise Ratio 31dB -
Upstream Receive Power -2dBmV +2dBmV

 

Here are my specs.

Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power

1 Locked ATDMA 7 5120 Ksym/sec 22800000 Hz 50.8 dBmV
2 Locked ATDMA 5 5120 Ksym/sec 35600000 Hz 51 dBmV
3 Locked ATDMA 6 5120 Ksym/sec 29200000 Hz 51.8 dBmV
4 Locked ATDMA 8 5120 Ksym/sec 16400000 Hz 50.5 dBmV
5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV

 

I am not sure what they are suggesting I do about the power settings. Is this something I can change?

 

I cannot find a pattern to the internet disconnects. My local network remains intact. This started over 1 year ago when i returned the Comcast Cable modem and purchased this one. I started working from at the start of May 2020 and every time this happens the companies VPN drops and my connection to the IBM AS/400 (iSeries Power 9) is lost. Most the time I'm writing software and will sometimes loose some code. It's happened as many as 25 times in 2 hours. Some days only once. This also causes my Phillips Hue lights in the house to lose their settings and can take hours to set them up again. (name them, put them in rooms).

 

Model: C7000|Nighthawk - AC1900 WiFi Cable Modem Router
Message 1 of 4

Accepted Solutions
FURRYe38
Guru

Re: c7000v2 - The upstream power too high / out of spec for Comcast

Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box. 
Be sure your using good quality RG6 coax cable up to the modem. 
Be sure to power OFF the modem for 1 minute them back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Mod...

My Setup ISP SparkLight | Internet Cable 1000↓/50↑ CM1200 Modem |  Wifi Router Orbi RBK752 (Router Mode), Wired Backhaul and R8500 with Orbi RBKE963 (AP Mode), | Switches NG GS105/8, GS308v3, GS110MX and XS505M | 

Additional NG HW: C7800/CAX80/CM1100/CM1200/CM2000, Orbi: CBK40, CBK752, RBK50, RBK853, RBK752, RBK953, SXK30 | NightHawk: R7000, R7800, R7960P, R8000, R8500, RAXE500, RAX50, XR450, EX7500/EX7700

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Message 2 of 4

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FURRYe38
Guru

Re: c7000v2 - The upstream power too high / out of spec for Comcast

Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box. 
Be sure your using good quality RG6 coax cable up to the modem. 
Be sure to power OFF the modem for 1 minute them back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Mod...

My Setup ISP SparkLight | Internet Cable 1000↓/50↑ CM1200 Modem |  Wifi Router Orbi RBK752 (Router Mode), Wired Backhaul and R8500 with Orbi RBKE963 (AP Mode), | Switches NG GS105/8, GS308v3, GS110MX and XS505M | 

Additional NG HW: C7800/CAX80/CM1100/CM1200/CM2000, Orbi: CBK40, CBK752, RBK50, RBK853, RBK752, RBK953, SXK30 | NightHawk: R7000, R7800, R7960P, R8000, R8500, RAXE500, RAX50, XR450, EX7500/EX7700

Message 2 of 4
SysopChris3
Luminary

Re: c7000v2 - The upstream power too high / out of spec for Comcast

Thank you. I'll follow as much of this as I can and send the rest to Comcast support.

Much appreciated.

Message 3 of 4
FURRYe38
Guru

Re: c7000v2 - The upstream power too high / out of spec for Comcast

Smiley Wink

My Setup ISP SparkLight | Internet Cable 1000↓/50↑ CM1200 Modem |  Wifi Router Orbi RBK752 (Router Mode), Wired Backhaul and R8500 with Orbi RBKE963 (AP Mode), | Switches NG GS105/8, GS308v3, GS110MX and XS505M | 

Additional NG HW: C7800/CAX80/CM1100/CM1200/CM2000, Orbi: CBK40, CBK752, RBK50, RBK853, RBK752, RBK953, SXK30 | NightHawk: R7000, R7800, R7960P, R8000, R8500, RAXE500, RAX50, XR450, EX7500/EX7700

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