We started using the Pac Wireless PoE-24iR-CI (with indicator light) recently. It has a built-in ethernet surge arrestor that looks like very similar parts to an external surge arrestor. It has twice the peak current of the Moto switching power supply for longer runs.
In the past, we mounted a Cat 5 termination box, connected to a wall jack surge arrestor, connected to PoE, connected to customer equipment. All those boxes and cables add up to well more than $20 which is all the Pac Wireless unit costs. Now we just terminate the cat 5 with a plastic end, plug it into the PoE, and the customer can use the plug on the other side of the PoE for their equipment. No mess of cables and multiple boxes anymore.
Does anyone else do this?? Some people just don’t use surge arrestors at all, but we felt irresponsible by not using them.
We are torn between using the Motorola power supply(ACPS110-03A) and Surge protection unit. And just using the Pac Wireless POE-24iR. Have you seen a reduction in surge related problems with blown network cards, grounding blocks, etc. I would guess that by using the house ground, it would be an advantage to trying to tie into the outside grounding rod and wire.
Please let us know what you have found
Jason
citescapeLLC wrote: We are torn between using the Motorola power supply(ACPS110-03A) and Surge protection unit. And just using the Pac Wireless POE-24iR. Have you seen a reduction in surge related problems with blown network cards, grounding blocks, etc. I would guess that by using the house ground, it would be an advantage to trying to tie into the outside grounding rod and wire.
Please let us know what you have found
Jason
I like using the motorola units for the surge suppression and aesthetics. Putting a box over your cable entry point is just that much more professional looking.
We used the pac-wireless units on different wireless gear and I always thought they performed well. I don't think I ever had a surge related failure where we used one.
I don’t see how only using this device satisfies NEC requirements for grounding/bonding your cable from the outdoor antenna. Maybe I am missing something?
No takers on my question eh?
amd phreak, I’m not sure what your question has to do with the original one. Whether or not you ground the cable shield or the mast has nothing to do with whether or not the electrical leads in the cable have some kind of ground/surge suppression. I am only talking about grounding the data/power wires here, thus protecting the customer’s indoor equipment against transient voltage surges.
Someone on here earlier posted that “I like the Motorola unit for the surge suppression and aesthetics”. WHAT are you smoking? The Motorola unit has NO ethernet surge suppression. Also, it requires an extra ethernet cable if you are plugging in a surge suppressor, killing the aesthetics.
I sympathize with the poster who says your company is torn between PoE+ethernet surge suppressor and Pac Wireless/Laird PoE with built-in ethernet surge suppressor.
Laird was the obvious winner for us. If you can grok my ramble, you may understand my viewpoint that there is just no competition between the two. I was hoping someone else agreed with me)
To picture what I’m talking about, we’re moving from Motorola PoE with Belkin Travel Surgepro surge suppressor. Our connection goes from the jack on the Moto PoE through a patch cable to the Belkin suppressor, and then on another patch cable to the outdoor wall jack. The customer plugs the flat black cable on the other side of the Motorola PoE into their router or computer. So the Motorola black power cable travels along with the patch cable from the PoE to the Belkin suppressor where the Motorola PoE plugs into AC power (through the Belkin’s power port). Jeez, all that??!?!??!1
To picture Laird, there is one cable from a wall AC jack to the power supply. The PoE has one ethernet cable to the wall jack and another cable to the customer’s computer.
disadvantage:
1.slightly higher cost $21 vs. Moto PoE $8+Belkin ethernet surge suppressor $8 or an additional $5 per customer in up-front equipment cost
advantage:
1. we have less cables to deal with in the future, obvious power cable, obvious ethernet cable, clearly labeled red power port (less support cost)
2. no further couplers are EVER necessary because Laird PoE has a plug-in jack on it where moto PoE has an RJ-48 end that can only plug into customer’s equipment, OR into a coupler which goes into another line that travels on to the customer’s eventual end equipment. (good couplers with cat-5 rating are several dollars, and another point of failure)
3. thus, it’s much easier to tell customers what plugs in where. (lower cost on support time)
4. we get surge suppression and PoE in one device, so there’s less shit to hang from a wall socket and it takes MUCH less space on a surge strip than PoE+surge (quicker/easier install, thus lower cost)
5. the plug does not weigh on the wall socket like a motorla PoE or surge suppressor might. thus, it does not fall out (lower cost on support time)
6. indicator light changes color when radio stops drawing power. this allows us to immediately troubleshoot radio cable issues and dispatch without wasting phone time. (lower cost on support time, happier customers who get quicker, more solid support)
twinkletoes wrote: Someone on here earlier posted that "I like the Motorola unit for the surge suppression and aesthetics". WHAT are you smoking? The Motorola unit has NO ethernet surge suppression. Also, it requires an extra ethernet cable if you are plugging in a surge suppressor, killing the aesthetics
What exactly does the 300SS do if it doesn't provide surge suppression for the ethernet? As far as aethetics go - it's much nicer to put that over the hole going into the customer's home than to just have a bare cable going through the wall - this of course only matters if you have something to tuck the outside cable run into. If you're lazy and just tack it down the wall, it isn't going to do a damn thing for you looks-wise.
twinkletoes wrote: amd phreak, I'm not sure what your question has to do with the original one. Whether or not you ground the cable shield or the mast has nothing to do with whether or not the electrical leads in the cable have some kind of ground/surge suppression. I am only talking about grounding the data/power wires here, thus protecting the customer's indoor equipment against transient voltage surges.
Actually I am referring to NEC 810-20 and 810-21. After reading this topic it appears that some are using the PAC protector/injector as their grounding point for their PoE runs. That is why I asked my question.
For reference here it is:
Lead-in Cable – Each conductor (coaxial, control, and signal conductors) of a lead-in from an "outdoor antenna" must be provided with a listed antenna discharge unit (grounding block). The antenna discharge unit must be located outside or inside as near as practicable to the entrance of the conductors to the building and it must not be located near combustible material [810-20]. The discharge unit must be grounded to an acceptable earth ground [810-21(f)] with a No. 10 copper bare or insulated conductor run in as straight a line as practicable [810-21].
Additionally:
NFPA 70 requires that telephone, communications or data type circuit conductors be properly surge protected with a primary SPD as close as practicable to the point of entry into the structure or building (NFPA 70-2005, Article 800.90). Some applications may require fused or resetable fuse type primary protection devices.
Only using a device INSIDE the dwelling unit or site is not the ideal way of protection. I understand that there are certain circumstances that do not allow installation of the protection device (such as a BET or Building Entrance Terminal). I'm not here to scold anyone, rather to point out these facts.
Just for reference:
http://motorola.canopywireless.com/fp/d ... 9bc766f5ed
This is a very old topic. I just found it after doing some research on grounding after a t-storm rolled through my area.
Since some time has past, Twinkletoes, if you are still out there, are you having any luck with the Laird unit? Any equipment casualties while using it?
I’m not trying to be lazy by not grounding outdoors, but if this unit will work inside, why would anyone not use it? Just asking.
Thanks!
well with a surge suppressor indoors your having to hope your customers home is grounded well… and well… experence in the computer business tells me… well people don’t have there shit grounded well… which is great for me. if you want to be safe, follow Code and install supressor at point of entry. don’t be lazy and hope the ground is good in the wall.