Home Networking

For a while now I've had 1200/200 service with comcast and could only ever achieve 30 upload. I've inquired about this a couple times and comcast always said that the next gen service just wasn't available in my area yet. Well they performed some maintenace in the area recently and I was hopeful I would be able to get the nextgen service but I was still stuck at 30.

I'd always seen these things in the junction box but never paid them much attention. I always prefer to see if there's anything I can do to fix or improve things before calling a tech out so I decided to replace the ground block and remove whatever those other 2 devices are. Lo and behold, my modem now shows 5 upstream channels instead of 2 and I now get 100 upload.

One of the devices (orange band) is an SHP3-35 high pass filter. No idea what the green one is, there are no markings on it. Maybe an attenuator? Anyone know if I really need either of these? It seems one or the other was holding back my upstream channels.

The high pass was blocking 3-35 MHz. The other is likely a MoCA filter. If you have a MoCA network, you absolutely want that filter in place. It’s a security issue. Your entire network is accessible by anyone nearby that has a MoCA network. Every one of your devices will appear in their network as a wired device and will not require authentication. Set top boxes may have MoCA enabled - TiVO and some other DVRs use it.

You need to have a competent tech come out and take a look at your network. The fact that you have a high pass filter tells me you have something bad going on at your house that warranted dropping a high pass on your house. Of course at some point, if that’s the case, a maintenance crew will find your drop and high pass it at the tap. But with a filter that will kill your entire return path disabling your modem.

Source: corporate technical compliance for a MSO (not Comcast).

Dump the high-pass filter, that is what was blocking your upstream channels; its job is to prevent noise from customers that aren't using the upstream. The other might be a (low-pass) MOCA filter, in which case its job is to prevent noise from customers using MOCA. If it is it won't have an effect on your service and is probably best left in.

Personally, I would recommend NOT trying to fix things that you are not familiar with.

It's great that removing stuff seems to have fixed your upstream problem, but you really shouldn't be messing with things because you have no idea how these parts might affect the rest of the providers system and their other customers.

Sick pretend lightsaber handle

Why did you remove it in the first place lol

You've removed the ground connection for the coax line. You should reconnect the ground block to the coax line and reattach the green wire to it.