superdog
I Need A Drink
Premium,MVM
join:2001-07-13
Lebanon, PA
| reply to lutful
Re: How does the POE work?
said by lutful  :I have never deployed or recommended USB CPE. But almost all WISPs I helped asked why they cannot use the "cheap" USB adapters being sold at computer stores. In 2003, I went around and ripped out every USB adapter we had in the field and replaced them with an ethernet solution. My tech. support calls went down 90%!!!. It also stopped my customers from sharing their settings with their neighbors. They would hand out the ESSID and WEP keys, and then the neighbor would just by a USB adapter off of ebay and get free internet. DO NOT USE USB ADAPTERS!. 
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»www.wavecrazy.net Join WISPA today! »www.wispa.org/ |
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lutful
Premium
join:2005-06-16
Ottawa, ON
 ·TekSavvy Solutions..
| reply to cmaenginsb
Just to clarify, I prefer to use standard 48V PoE devices or 48V injector with DC/DC converter. 
I have never deployed or recommended USB CPE. But almost all WISPs I helped asked why they cannot use the "cheap" USB adapters being sold at computer stores. |
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cmaenginsb
Premium,MVM
join:2001-03-19
Palmdale, CA
| reply to ssprenge
Lutful, if the device only used the power leads then it would not be limited to 15', however why have an ethernet device powered by USB?
gpilot, USB CPE like you're talking about has been discused here. Here are some problems with the idea:
1. Not easy and simple to deploy. USB CPE require drivers to be installed on the users PC and configuration information to be set on that PC. Even using active USB adapters they are harder to mount outside. Unless you can terminate the USB cable you need to drill a large hole than that for coax to allow for the usb connector to go through the wall.
2. Not easy to maintain. Anytime the user reloads their computer they need to reinstall the drivers and configure the thing. For troubleshooting purposes we can show up and test the radio with our laptop, if it works the problem is on the customer's side and other than making sure their network settings are correct we don't have to get involved.
3. Sharing. if you only want 1 customer computer connected to your network it's not bad. If the customer wants a setup similiar to DSL or Cable they would have to enable and configure internet sharing, which generally means you have to help them.
We offered USB CPE for a lower install charge when we first got into the business (like $100 cheaper). We had maybe 2-3 people take them.
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CCNA, Comtrain Certified Tower Climber |
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gpilot
join:2006-04-29
Napa, CA | reply to public
Re: Dumb Customer Trouble Calls Revisited
its a good idea. Now a simple attenna that could plus directly via USB to a clients PC would be great because its simple and easy to deploy.
Link the HGA solutions where a simple CPE is under a 100 bucks. |
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public
join:2002-01-19
Santa Clara, CA
·DSL EXTREME
| reply to LLigetfa
said by LLigetfa :said by electric6 :
Unless the computer has a POE NIC, you need a power injector and a 48V wall cube.
I think Tranzeo uses an 18 volt wall wart. There are all kinds of proprietary noncompliant implementations. If you have one of those attach a big noncompliant warning label. Otherwise someone will connect 48V and wonder what happened.
There are simple single chip compliant designs:
»www.linear.com/pc/productDetail.···5,P30872 |
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AMD Phreak
Premium
join:2003-12-14
| reply to cmaenginsb
Re: How does the POE work?
You are right. It's a USB-ANT. From a quick google search it is mostly software controlled on the pc just like any other USB Wifi device.
I'm glad we have only a couple or so of these units. They seem like a turd. Short cable lengths prohibit any REAL installation, no quality software for configuration, and the list goes on. |
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lutful
Premium
join:2005-06-16
Ottawa, ON
·TekSavvy Solutions..
| reply to gpilot
said by gpilot :I think USB is 16V which could power a small radio, of topic i know but... USB can "officially" supply only 500mA continuously at 5V (2.5W) to a device at maximum 15ft distance.
You can use any of 1000+ USB WiFi devices as a "window mounted" CPE.
A few companies also sell "extended USB" CPEs that do 80ft.
They generally cost in the $50 to $75 range. I think it is best to connect them via a powered HUB to avoid motherboard damage.
See one example above from Superpass. |
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cmaenginsb
Premium,MVM
join:2001-03-19
Palmdale, CA | reply to ssprenge
Phreak, that isn't a true etherant. YDI made a CPE similiar to the Etherant that used a USB wireless radio.
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CCNA, Comtrain Certified Tower Climber |
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aeronet
join:2002-04-05
San Juan, PR | reply to ssprenge
circa 2001,
when i was testing wisp gear, I need a way to extend usb range on a Raylink (yuck) USB CPE's. I found a usb extenders that used cat5 for up to 100' but the price was $85.
those good old days..... |
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AMD Phreak
Premium
join:2003-12-14 | reply to robbin
Actually I found some YDI USB Etherant CPE's in our inventory after an aquisition. I'd have to check how it works, but it is a USB cable that runs inside. Never took the time to look....the cables are like 15 feet or something obnoxious like that. |
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robbin
Premium,MVM
join:2000-09-21
Leander, TX
| reply to gpilot
USB is only 5 volts but the greater problem would be the low amperage. Here is a link to the specs. Even if there were enough power there I think it would be an extremely bad idea. Using the customer computer to power a WISP radio would be just one more thing to blame the WISP for if they had any kind of computer problem. |
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gpilot
join:2006-04-29
Napa, CA | reply to korym
Its a shame you cant get USB POE's
I think USB is 16V which could power a small radio, of topic i know but... |
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korym
Go Wisp's
ExMod 1999-03
join:1999-12-23
Richmond, VA
clubs: | reply to ssprenge
Oops, replied to the wrong thread. (Just noticed it was moved.)
My bad.
Regards,
Kory |
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lutful
Premium
join:2005-06-16
Ottawa, ON
·TekSavvy Solutions..
| reply to ssprenge
Re: How does the POE work?
said by ssprenge :all I have to do is plug the cat 5 cable from the cpe radio into the ethernet jack in the computer. And that's it. How does the POE work in that scenario? Does the computer provide the power to the cpe radio? This is almost never true.
The PoE CAT5 will go first to an indoor PoE device which has a separate non-PoE port (usually marked "DATA") to connect separate CAT5 to PC or router.
It is very important to understand and follow the vendor's directions. PoE voltage levels for various CPE models can be can be 48V or 24V or 18V or 15V or 12V.
said by ssprenge :These client PC's do not need anything else but their NIC card to receive internet service, right? Occasionally you will have to use cross-over cable if the NIC does not implement auto-MDIX. You will know by link lights not blinking.
said by ssprenge :And if the customer wants to distribute a wireless signal using a wireless router such as a Linksys, all I have to do run the cat 5 cable into the Linksys, and configure their laptop or a wireless capable desktop. For this privilege, you just have to connect WAN port of indoor wireless router to DATA port of PoE device.
The router's WAN setting could be static IP or PPPoE or even dynamic IP based on how setup your WISP. |
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LLigetfa
join:2006-05-15
Fort Frances, ON | reply to PetePuma
Not all POE are created equal. You need to match the injector with the power consuming device as there are not only different voltages involved but also different copper pairs. I believe that for a Tranzeo radio, you would use their POE injector. |
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PetePuma
How many lumps do you want
Premium,MVM
join:2002-06-13
Arlington, VA
| reply to bryandj23
You need devices at both ends that support POE. One end provides a power source, the other end consumes that power.
How that power gets on the wires depends on the power source hardware. Some POE switches include POE voltage, or you can buy an injector that you connect a Cat5 cable (and a transformer) to, and then run another Cat5 cable out the other side.
Similarly, a consuming device must be built with POE in mind -- you can't just run any old device with an ethernet port using POE power. |
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bryandj23
join:2002-08-15
Bay City, MI | reply to ssprenge
 |
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PetePuma
How many lumps do you want
Premium,MVM
join:2002-06-13
Arlington, VA
| reply to ssprenge
Re: Dumb Customer Trouble Calls Revisited
said by ssprenge :What's a wall wart? Transformer. Adapter. Those square/rectangle things that plug in the wall and have a connector on the other end. |
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ssprenge
Premium
join:2006-10-09
Chaska, MN | reply to LLigetfa
What's a wall wart? |
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