CM500-100NAS Bad Ping

[fela]

Hi,

I recently purchased this modem from Amazon. 

https://www.amazon.com/gp/product/B06XH46MWW/r

The ping is terrible and I exhibit significant packet loss. Online gaming isn't possible.

I use http://ping-test.net/ to verify my issues.

Ping jumps to the the hundreds of milliseconds. Performance I tested connected directly to the modem, so it's not a router/wifi issue.. Comcast verified the connection was good from their end and I want to see if anyone has any suggestions before I call the tech or buy a different modem.

Thanks

[FURRYe38 · Accepted solution]

Awesome, glad it was fixed. Please mark your thread as solved so others will know. Enjoy. 

[FURRYe38]

Are you using the CM modem with your gaming device or is there a router in between the CM modem and your gaming device? If so, Mfr and model# of this router please.

Have the ISP check the signal and line quality UP to the modem. 

Be sure there are not 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. 

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@fela wrote:

Hi,

I recently purchased this modem from Amazon. 

https://www.amazon.com/gp/product/B06XH46MWW/r

The ping is terrible and I exhibit significant packet loss. Online gaming isn't possible.

I use http://ping-test.net/ to verify my issues.

Ping jumps to the the hundreds of milliseconds. Performance I tested connected directly to the modem, so it's not a router/wifi issue.. Comcast verified the connection was good from their end and I want to see if anyone has any suggestions before I call the tech or buy a different modem.

Thanks

---

[fela]

Thank you Furrye38
The router is not the problem.

Ethernet
1 Ping Test: US - Washington 149 ms 109 ms 82 ms 645 ms
2 Ping Test: US - San Francisco 132 ms 46 ms 18 ms 1049 ms
3 Ping Test: BR - Sao Paulo 236 ms 220 ms 181 ms 452 ms
4 Ping Test: CN - Hong Kong 223 ms 201 ms 165 ms 370 ms
5 Ping Test: NL - Amsterdam 272 ms 191 ms 162 ms 1882 ms
6 Ping Test: RU - Moscow 271 ms 248 ms 205 ms 557 ms

Wifi
1 Ping Test: US - Washington 130 ms 102 ms 82 ms 732 ms
2 Ping Test: US - San Francisco 152 ms 37 ms 14 ms 825 ms
3 Ping Test: BR - Sao Paulo 267 ms 235 ms 179 ms 821 ms
4 Ping Test: CN - Hong Kong 242 ms 215 ms 166 ms 404 ms
5 Ping Test: NL - Amsterdam 278 ms 196 ms 165 ms 1548 ms
6 Ping Test: RU - Moscow 374 ms 302 ms 213 ms 1227 ms

The results are very similar through wifi or direct to modem (I'm in San Francisco).

I do have a splitter and I just found out. Is that a problem? I will be verifying the cables are connected on it well later today.

Thanks

[fela]

Thanks for your help. Comcast had a filter on the main line on the street that they removed. I have no idea why it was there to begin with.

That was the problem.

[FURRYe38 · Accepted solution]

Awesome, glad it was fixed. Please mark your thread as solved so others will know. Enjoy.