cable - In vs Out ethernet jack on UPS
2014-04
Celeritas
On my Cyber Power 825 AVR UPS it has two ethernet connections: one labeled in and the other labeled out. What's the difference?
happy_soil
Most UPS will come with said Ethernet jacks, which protects you from power surges coming from your networking device (UPS also act as surge protectors).
However, it's unlikely that your networking devices would randomly generate these abnormal amount of current down the wire; instead, it's more to protect you from adverse weather conditions, i.e. your house getting struck by lightning. Dangerous amounts of current could pass through the telephone wire and fry every device in its path. This is where the Ethernet jacks come in handy. Not only that you're protecting your PC through its mains, but you're also protecting yourself from the LAN side.
For the two Ethernet ports, the one labeled IN is used to connect the UPS to the router/switch; OUT then goes to the computer.
Haroon
here is the situation...I've got my main router in the basement, and want to install a WAP on the 1st floor so I can access the internet from my room.
So I ended up getting a WAP (of TPLink) and connecting it to the main router via a 50m CAT5 cable.
Now the issue is that when I connect the 50m end to the WAP, it does not detect the network..(when I connect the WAP through a shorter cable it detects the LAN and runs fine).
I connected the 50m cable to my laptop and it was working fine-but at 10Mbps. Also when I connect the 50m cable to my brother's computer it doesn't detect any network either.
Any ideas what could be the issue? Is there some limit on the length of cables on Ethernet I'm missing here?
MDMarra
Sounds like you have a bad cable. Toss it and get a new one. 50m is not the problem, those cables are spec'd up to 100m. Most likely there is at least one broken pair, probably more inside the cable.