Extending internet signal to all outlets

Question

My house is wired with two Cat5e cables: one terminated downstairs, one upstairs. Currently, only the downstairs outlet is receiving signal, with the modem being hooked up to it. I'd like to move the modem before the two cables, so I can have ethernet upstairs too without having to run a new cable. Seems pretty straight forward, but don't want to operate on assumptions and break something.
My internet point of entry is the outdoor device pictured below. The cable coming out of the board is going to a junction box right below where it's spliced directly into the downstairs Cat cable. The upstairs cable is also in this junction box, unterminated.
Am I correct to assume that I can can simply run a cable from the pictured device straight into the modem, then have the two house wires connected to the modem, or am I missing something?
Thanks in advance

jwh20 · Answer

What you are showing in the photo is the internet provider's "modem".  In this case it appears to be a FTTH termination with 6 "Ethernet" outputs.
There also appears to be a single, poorly done, connection to one of these Ethernet ports that is going somewhere, presumably to the working downstairs location.
The photo doesn't appear to show any additional Ethernet wires that might be used to distribute Ethernet signals to other parts of the home.
While you might be able to do it yourself, what is needed is a new Ethernet wire from another of the "LAN" ports to the new location you want to have a connection to.  The simplest way would be to purchase a ready-made Ethernet cable of the suitable length and "fish" it through the walls in order to route it to the new location.
If that's beyond your capabilities, it might be wise to have a professional installer do this for you.  While they are at it, the existing wire should be checked and possibly replaced.

Extending internet signal to all outlets

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