Gigabit WAN Upgrade- Wierd Issues

[Venkatesh Ravi]

Hey guys

I recently planned to switch my POE injector splitter to Gigabit to facilitate higher than 100Base-T speeds. Now I am stuck in a weird issue as shown in the below picture

I am running a CAT5E cable for about 30ft from my router to a wall RJ45 Socket. From that Socket I run another CAT5E cable to the ISP provided ONT (Image 1)

I was using a 100Mbps (2 Pair Passive POE injector Splitter earlier). Now I switched to a Gigabit POE injector Splitter (Image 2)

After the upgrade i tested it out in dd wrt Console. And it reported my link speed as 100Base-T. So I resorted to testing it out with a network cable tester (Image 3)

I am able to get all 8 pairs connected from the wall socket to my router. I inserted a patch cable from the network tester to the socket just to make sure the socket is not at fault. I am able to get all 8 Wires to light up.

I again tested from the wall socket to the ISP provided ONT. Again all 8 Wires Light Up

However when I link both these cables from the router to the ISP Provided ONT ( The 8th Wire alone goes blank). Beware that this is all before even the POE comes in. 

Do you guys have any insight as to why this thing is the case ? 

Isolated Network Layout (Image 4)

 

Image in below post

 

 

[Venkatesh Ravi]

Image 1

http://prntscr.com/gqbpnc

 

Image 2 

http://prntscr.com/gqbpvj

 

Image 3

http://prntscr.com/gqbpz1

 

Image 4Isolated Network Layout :

http://prntscr.com/gqbpdz

Edited September 27, 2017 by Venkatesh Ravi
Double Paste

[brwainer]

The cable that was labeled as (#3-#4) plugs directly in to the wall socket?

 

visually inspect the wall socket to see if one of the pins is damaged. Possibly with the cable you used for testing, it makes a connection, but with the actual cable you are using it does not.

[Venkatesh Ravi]

2 hours ago, brwainer said:

The cable that was labeled as (#3-#4) plugs directly in to the wall socket?

 

visually inspect the wall socket to see if one of the pins is damaged. Possibly with the cable you used for testing, it makes a connection, but with the actual cable you are using it does not.

Thank you dude, Turns out, I have to stop buying cheap RJ45 plugs, One of Pins went a bit too in and the socket wasnt able to make contact only with that particular plug. I replaced it and voila solved !!