LAN Switch Not Working from Wall Jack

[Zabcheckmate]

I'm using a 3Com 16 port gigabit switch (3C1671600A) and a Verizon Fios router (MI424WR-GEN3I), with Fios also as my ISP. I'm having issues getting the switch to connect two devices to the network and internet when the switch is connected to a wall jack, which is in turn connected to my router. The following connections all work.

Computer --> Router
Computer --> Wall Jack --> Router
Computers --> LAN Switch --> Router

It's only the Computers --> LAN Switch --> Wall Jack --> Router connection that isn't working.

Any thoughts on things I should try?

 

[Ralston18]

First be sure that you have tried the connection using known working ethernet cables between the computer to switch connections and the wall jack to router connection.

Check inside the wall jack. Make sure that all of the wires are tightly connected/"punched in".

The little wires may look ok but does not take much to lose connectivity. Especially if the initial installation was marginal to begin with.

Likewise you need to look at the other end of that connection. Normally a patch panel is used to serve wall jacks. One end of connecting cable is punched into the patch panel, the other end is punched into the wall jack. Punchdowns must adhere to the same pattern 568A or 568B.

The connectivity must be the same on each end and all connections must be securely in place.

Google "wall jacks patch panels" for examples including diagrams and photographs.

If you cannot find or otherwise identify some specific wiring problem then the ethernet cable inside the walls may have been damaged somewhere. Rodent chews, pinched, nail or screw driven in..... See if you can trace the wiring path from wall jack to patch panel.