OmniTouch 5.7 or 5.7e w/video using alternate wiring

[JoxRobot]

I'd like to use either the Omnitouch 5.7 or preferably the 5.7e with video. I have a preinstall with Nutone wiring (3pair twisted 22ga) and was wondering if this will work?

I know that 10baseT and 100baseT using ethernet protocols will work with two twisted pairs but will this work with the OmniTouch? If the 5.7e needs PoE, does anyone have a pinout as to which wires are used to provide powerand what the voltage supplied is for the 5.7e? If not, will video work on the 5.7 with only 3 pair?

Thanks!

 

[ano]

You only need two twisted pairs. PoE run on 45V+ There isn't any separate wires. That is why its called Power OVER Ethernet its not called Power Along with Ethernet. That would be PAwE. :rockon:

 

[JoxRobot]

Hi Ano,

Thanks for the reply! This saves alot of time and effort since it would be a nightmare to rip out the Nutone wiring. I'm amazed that manufacturers don't publish this since this would make their products sell like hotcakes for people who have wiring that will work but don't want to cut open walls. Have a great one!

 

[ano]

Now, you do need a way to inject the power onto the Ethernet cable. The easiest way to to get a switch or router that supports PoE, but you can get a power injector as well. Also, you do want to keep the Ethernet cable length as short as possible and never over 300 ft. (There is a rule for each gauge cable.)

 

[tmbrown97]

You only need two twisted pairs. PoE run on 45V+ There isn't any separate wires. That is why its called Power OVER Ethernet its not called Power Along with Ethernet. That would be PAwE. :rockon:

Unfortunately, that's not really accurate.

In standard 10/100 ethernet, your data is on pins 1,2,3 & 6; that leaves 4 pins left; they generally get doubled-up so 4 & 5 are + and 7 & 8 are Negative. They're doubled up to help with the power handling over distance.

In Gigabit ethernet, all 4 pairs are used; so in that instance, the POE will still exist on pins 4/6 and 7/8 but in that case, it's over the top of the ethernet signal - and both the switch and the LAN card have smarts and protection to keep from frying things.

In this case, I think you can make it work just fine but you'll have to custom wire that. You may be OK running the pairs for 1/2 and 3/6 and running the last pair to 4/7 for power - but just to keep the twisted pairs and both ends happy, I'd probably custom-pigtail the power pairs out that way you can connect all 4 of the power pins instead of just 2. This would be a slightly tricky operation while keeping the integrity of the Ethernet on the other pairs, but perfectly doable.

 

[ano]

That isn't exactly right. PoE over 100BASE-TX or 10BASE-T operates in two modes. Mode A delivers power on the data pairs of 100BASE-TX or 10BASE-T. Mode B delivers power on the spare pairs as Work2Play says. My house was wired with 8 conector wires for phones but no Ethernet. I use two of the pairs for phones, and two of the pairs for Ethernet, including PoE, and it works fine. I don't own a OmniTouch 5.7e, so I can't speak for that device, I use it with netcams. If you have three pairs of wires, you can use the for power, but I do not think that is required, and the 5.7e would need a power jack.

1000BASE-T wouldn't work, but the 5.7e probably doesn't support that anyway.

 

[JoxRobot]

thanks Work2Play, what you're saying does make sense- I have a sneaking suspicion that HAI Leviton does employ that method since the 5.7e looks like it would need quite a bit of power. It would be nice to have a pinout or someone with experience confirm this as well, but just the posts above have helped quite a bit and I thank you all.