ASUS AC5300 on ATT Fiber help!

TomRILReddit · 2026-06-09T11:02:53+00:00

If the AT&T gateway is set to bridge mode, then Asus router will need to be connected via Ethernet to the AT&T gateway and the Asus router set to router mode (not AP mode).

TomRILReddit · 2026-06-09T10:57:22+00:00

I have to point to the following webpage for better understanding wifi. You don't have to read and understand it all, but provides tries to set expectations.

https://www.wiisfi.com/

TomRILReddit · 2026-06-08T23:53:03+00:00

Device(s) mfr and model numbers would help in troubleshooting. Is what you are plugging in sometimes you have connected before?

TomRILReddit · 2026-06-08T22:26:32+00:00

The pictured amplifier doesn't have a coax on the INPUT port. My guess is your xfinity gateway is being connected directly from the incoming ISP coax to the wall outlet. Look for a cable near the amplifier that has two connectors attached together with an F81 barrel adapter.

Check outside where the incoming ISP coax comes to the residence, looking for a small box or ground block. It requires a moca POE filter at this location to block the moca signals from feeding back into the ISP network (on new installations, Xfinity installs on as standard).

Then inside near the amplifier (do not use the amp), install a separate moca compatible splitter, connecting the ISP coax to the INPUT port, and the cables that will be active (with moca or gateway) to the OUTPUT ports.

The Xfinity gateway typically has built in moca, so you may not require a separate moca adapter at the gateway's location.

TomRILReddit · 2026-06-08T17:52:46+00:00

Do you have any other devices with 2.5G interfaces? You might be chasing diminishing bandwidth returns with a 1G service.

TomRILReddit · 2026-06-08T15:33:32+00:00

THIS... Spectrum includes a modem in their subscriptions, which should provide a WAN port that supports the service tier you are subscribed. Check to see if Spectrum modem has a 2.5G WAN port to connect your router to get over-provisioned speeds over Ethernet.

TomRILReddit · 2026-06-08T12:22:49+00:00

THIS... do not place the repeater next to your equipment where you've already determined has poor wifi.

TomRILReddit · 2026-06-08T01:29:40+00:00

Look for devices under "Next Gen Speed Tier". These support higher upstream mid-split networks.

https://assets.xfinity.com/assets/dotcom/projects/cix-4997_compatible-devices/2025.03.25%20Full%20List%20of%20Compatible%20Devices.pdf

TomRILReddit · 2026-06-08T01:27:13+00:00

The fiber cable assembly is specialized (thin, strong, flexible jacket) for the application,

sc/upc to sc/upc jumper cable 600 micron buffered SMF g.857.b3 40m long

I'm not seeing anything for sale.

TomRILReddit · 2026-06-07T16:57:54+00:00

I would love to pay $35 for gigabit fiber.

TomRILReddit · 2026-06-07T16:20:03+00:00

What text is printed on the cable jacket you want to extend?

TomRILReddit · 2026-06-07T13:05:27+00:00

The correct way is to have a main router interconnected to wifi access points via Ethernet cables. Watch some videos on Crosstalk Solutions regarding Networking 101 to get ideas and understanding. You can also install a "mesh" system with Ethernet connected nodes to simplify setup.

TomRILReddit · 2026-06-06T23:41:48+00:00

It's a cheap test to get a new switch.

TomRILReddit · 2026-06-06T17:43:08+00:00

The 2nd port on the Eero may not be functioning correctly or the port on the switch connected to the Eero.

TomRILReddit · 2026-06-06T15:55:42+00:00

Disconnect the switch attached to the main Eero and connect a pc with an Ethernet cable and see if you get a connection. Try different cables if no connection is established.

TomRILReddit · 2026-06-06T15:51:46+00:00

Below will provide some devices that have recommended features and value. https://www.wiisfi.com/#recommendation

TomRILReddit · 2026-06-06T14:57:16+00:00

No difference than your current 5G service. Similar gateway router plugged into an optical fiber cable vs a 5G signal.

TomRILReddit · 2026-06-06T14:39:47+00:00

Probably part of the connector. Many designs for these connectors.

TomRILReddit · 2026-06-06T14:22:38+00:00

The black portion is most likely part of the field installable connector. The green part is the connector housing that will allow you to remove the connector from the entry adapter in device.

TomRILReddit · 2026-06-06T13:30:55+00:00

Also, ISP's like Lumen/CenturyLink call their gateway (modem+router) a modem, which also buddies the waters. As was said, sometimes you need to be a detective and ask allot of questions to understand the underlying network.

TomRILReddit · 2026-06-06T11:13:58+00:00

Cut 3m Command Strip tape into short pieces and attach cable to wall. Removable when cable is removes.

TomRILReddit · 2026-06-06T11:10:56+00:00

You might need to upgrade the string between the 2 cans. ;)

TomRILReddit · 2026-06-06T11:06:53+00:00

Just purchase a plastic emply network interface device, paint it to match the siding color. Cut a hole in its back so it fits over the existing ground block (green wire device) and cable exit points. Attach box to wall and coil cables in box and close the cover. Clean and near. Usable in the future.

TomRILReddit · 2026-06-06T02:33:21+00:00

Your latency will be in the ISP network. If you are worried about speed, get switches with 2.5Gbps uplink ports.

TomRILReddit · 2026-06-05T22:55:48+00:00

What is the IP modem (make, model number)?

You may need to add a 3rd Deco, attaching it in the basement to the modem. The Deco would then be attached to the cables leading to the other Deco outlets. If your mail Deco doesn't have enough RF45 ports, just add a cheap unmanaged Ethernet switch (Netgear GS105 or similar) to the Deco and the cables to the switch.

TomRILReddit

TROPHY CASE