My parts:
- Cable Modem ES2251 DOCSIS 3.1 eMTA (frequency 108 -1002MHz per manual)
- Splitters is GE 5-2500MHz
- MoCA filter 35-45dB of rejection in the MoCA 1125-1525Mhz
Initially, I added the MoCA PoE Filter and the two Splitters, and it all tested good with full speed Internet. As soon as I install one of the WF-803M, the modem will go offline, and it will not sync with ISP. If I install both WF-803M, the Pwr and MoCA LED stays on, while LAN flashes, and I can ping upto the router. If both WF-803M are disconnected, the modem syncs and all work without issue.
Below diagram is my setup. Please help.
There could be various reasons why you are unable to connect to the internet, but here are some frequent modem-related issues: Remove any loose power or coax connections. Ethernet cable connections that have been connections damaged. Communication breakdown with the router.
Before troubleshooting your modem, it's a good idea to check if there are any service outages or disruptions in your area. Contact your basketbros or visit their website for outage information.
A non-synchronous cable modem can result in a complete loss of Internet connection. When the modem is out of sync, it cannot establish a connection to the cable service provider's network. slope
Working as an ISP, I occasionally need to refresh my memory on the concepts of SNR, Power, and MER, and you're the only one on YouTube providing videos of this caliber and clarity. Keep it up, the backrooms! There's point in trying to figure it out on one's own when knowledgeable people like yourself can provide such a detailed explanation.
Short answer: Install a separate (second) MoCA filter directly on the DOCSIS 3.1 cable modem as a prophylactic, to protect the DOCSIS 3.1 modem from the MoCA signals. (With the DOCSIS 3.1 spec overlapping the MoCA frequency range, MoCA signals are a coaxially transmitted disease to a D3.1 modem.)
p.s. Above presumes use of a DOCSIS 3.1 modem only, absent the provider actually employing DOCSIS 3.1 frequencies above 1002 MHz. (Which should be the case of the OP, since the "PoE" MoCA filter — actually installed at the cable signal point-of-entry — would have been blocking D3.1 signals, anyway.)
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Longer...
DOCSIS vs MoCA:
* MoCA Extended Band D: 1125-1675 MHz
* DOCSIS 3.0: up to 1002 MHz
* DOCSIS 3.1 “initial rollout”: up to 1218 MHz
* DOCSIS 3.1 “full”: up to 1794 MHz
More info here: https://www.reddit.com/r/HomeNetworking/comments/uvzqda/not_sure_if_this_mocapoe_filter_my_isp_let_me/i9pei20/
Will feedback to you by email. Thanks.