Build Your Own Cell tower 377
BlakeCaldwell writes "If you're the type who dreads being dragged kicking and screaming into the use of a cell phone, Samsung sells their Long Range Cordless Phone. With an incredible (for landlines) 30-mile range, the set includes a caller ID-capable LCD and is able to communicate with the base-station, acting as an intercom."
Sweet! (Score:5, Interesting)
It's not so much that I don't want a cell phone, it's more that I don't see any use paying $40-50 a month for something I don't use more than 100 minutes a month. Even if I only got five miles of range out of it, it would easily cover 99% of my needs.
Re:Sweet! (Score:5, Interesting)
The phone might not adhere to FCC regulations. If you can't use a FRS radio for more than a couple miles w/o a license why would you be able to use this cordless phone?
Re:Sweet! (Score:3, Informative)
Are you and the mods new here or something?
Re:Sweet! (Score:3, Informative)
Re:Sweet! (Score:5, Informative)
"Now for the long awaited question. I took the whole setup over to a friends place who is a ham radio operator. He immediately chastised me for importing such contraband into the country and continually tsked tsked me while he checked the frequency on the equipment and salivated over it all wishing he had a set of his own. Well, here's the bad news....the frequency range is indeed 450 transmit from the base and 230 from the handset, reverse for the receive frequencies. This of course puts this outside the GMRS band and in the case of the 230 mhz band into some part of the aircraft communication band of frequencies. I do not have the exact frequencies in front of me at this moment but I have been for warned that by using these new toys of mine I would be infringing upon part of the Private Radio Service in the 450mhz range and, as mentioned, part of the aircraft comm band in the 230mhz range. So things look a little bleak as far as using this stuff in the US is concerned."
Are you and the mods new here or something?
Don't even go there.
Re:Sweet! (Score:4, Informative)
Presenting, The Cartoon Guide to Federal Spectrum Policy [newamerica.net].
The first time i read it, it seemed like fluff. But its actually quite educational.
Myren
Re:Sweet! (Score:5, Informative)
You need to be very careful when purchasing RF equipment outside the US; that it's legal inside the US. A mistake can be expensive!
Comment removed (Score:5, Interesting)
Re:Sweet! (Score:2)
Re:Sweet! (Score:2)
Its $18 for SBC Phone line, and another $12 for the oneline stuff, so why NOT have a regular phone service?
Ill pay $4/mo for 911 and pizza delivery. Plus, it gives me a number to give out to pesky people like the landlord.
Oops, make that $6. (Score:2)
Re:Sweet! (Score:2)
I'd still rather have Comcast for internet access than have anything to do with the phone lines, however.
Re:Sweet! (Score:2)
Re:Sweet! (Score:2)
Re:Sweet! (Score:2)
Re:Sweet! (Score:3, Informative)
Re:Sweet! (Score:4, Insightful)
Re:Sweet! (Score:3, Insightful)
one of the points of why landlines in normal everyday usage between normal people around here is used less and less is that practically every time you would be calling to a cellular phone - and calling to a cellular phone from a landline costs generally more than if you called to it from another cellular phone.
with this beast i'd worry more about how man of these things can be used at a time in a certain area(because
Re:Sweet! (Score:2)
Somebody correct me if I'm wrong, but I believe in the United States, it's the recipient of a call to cellular phone who pays the extra charges. Maybe I just don't see the charges because every call I make to anywhere in the US or Canada is covered by my monthly fees... Maybe it's the fact that I'm a Vonage customer. Anyway, I don't ever recall paying extra for this even before my V
Re:Sweet! (Score:2)
Generally yes, but Nextel has had no-charge incoming calls on certain plans for a couple of years. I generally use over 1700 minutes a month, but with free incoming 24x7x365 and free nights & weekends (9pm-7am), I rarely use more than 250 "plan" minutes (out of 600).
Re:Sweet! (Score:5, Interesting)
Re:Sweet! (Score:2)
What you save is the cost of phonecalls made over your phoneline.
Including the internation calls I make (about 3 hours a month US=>Netherlands) this adds up to a not so whopping $15 a month for me.
Re:Sweet! (Score:5, Informative)
Most of these types radios use frequencies right in the midle of the the 2 meter band (140Mhz), allocated to gov't/amateur radio.
Just wait and see what happens when you fire up one of these and step all over coordinated 2m repeater....
Re:Sweet! (Score:4, Informative)
Re:Sweet! (Score:2, Informative)
Faraday
google might help you [google.co.uk]
Thankyou.
Re:Sweet! (Score:3, Insightful)
Re:Sweet! (Score:3, Informative)
Operating frequency: 230-450 Mhz
What's that in the middle of?
Military alocations.
That is almost the exact freqs of the WSC-3's I used to work on when I was in the Navy...
BWP
Re:Sweet! (Score:3, Interesting)
And how soon before they cross frequencies? (Score:5, Insightful)
Re:And how soon before they cross frequencies? (Score:3, Insightful)
Neighborhood? Your neighborhood is 30 miles wide? I'd call that a city, so if more than 10 people in the city get this it's over.
Re:And how soon before they cross frequencies? (Score:2)
Low speed WiFi (Score:5, Interesting)
Re:Low speed WiFi (Score:2)
Can be converted (Score:5, Informative)
Something that I find surprising in some slashdotters is the fascination for wireless technology. Charming as it is, wireless is just another type of technology having its own benefits and hurdles. In general it is not the 'being wireless' part that is difficult: transmitters have existed for over 100 years.
I understand other people's fascination, but anyone can have his own transmitter, given that you can pass the HAM exam (if not you shouldn't be fooling around with wireless equipment anyway). Wireless links can be bought almost off-the-shelf.
IMHO the communication scheme itself is a lot more difficult. This can be understood easily by looking at the evolution of wireline modems: they started at 150 (or so) bps and worked their way up to 33kbps (higher rates use special tricks). All the time the medium remained the same, only progress was in the digital layers. For the same reason, I don't think it is fair to say 'wireless problem solved, halfway there'.
Just my 2ct...
High-power RF interference (Score:5, Interesting)
$0.02,
ptd
Re:High-power RF interference (Score:3, Interesting)
I frequently had issues in the dorms in college with interference from nearby cordless phones. I usually had to change "channels" on the base station several times in order to get out of the range of the people around me.
Pretty typical of cordless phones.
Re:High-power RF interference (Score:2)
Re:High-power RF interference (Score:5, Interesting)
In my neighboorhood I have three ham radio operators within about ten blocks of me. I am convinced one of them is running an illegal amplifier. When it is transmitting, I get sine waves on the screen of every television in the house. When he keys the microphone, he broadcasts through my computer speakers even with my computer turned off. I finally got fed up with it and complained to the FCC. They sent me some nice brochures on how to shield my home entertainment equipment from RF interferance.
Re:High-power RF interference (Score:5, Interesting)
Re:High-power RF interference (Score:5, Interesting)
A licensed operator running an illegal amplifier obviously should be given lower priority than the owner of an FCC-approved consumer device. The other guy has no right to remove your use of the spectrum, while his use is probably considered beyond reasonable.
I'm just arguing for the sake of arguing. This is Slashdot, after all.
Re:High-power RF interference (Score:4, Informative)
But to it into perspective. The Ham operator is licensed to use that block of spectrum if your device is picking it up it is not his problem. Most likely it is your device at fault.
Re:High-power RF interference (Score:4, Insightful)
I'm not sure what the maximum power output is in the United States, but here in Sweden, a licenced radio amateur operator can put out up to 1 kW or so without any additional license.
And, being a ham radio operator, you don't actually have to use equiment certified by anyone. Part of the reason you have to take an exam to become a ham radio operator, is to demonstrate they you know what you're doing. Amateur radio is the only service I'm aware of (other than possibly the military) that doesn't require its users to use type approved equiment.
Now CB radio however, that's a completely different story. Any idiot can go to his local electronics store and buy himself a CB rig capable of putting out 5 W of power with a microphone and jabber into it.
Now if he is a CB radio operator -- if he's using any amplifier at all, it's probably very illegal -- and usually of poor quality with lots of nice harmonics.
So how can you tell if your friendly neighbour with the amplifier is a licenced radio amateur running QRO on HF, or if he's an illegal CB operator?
Well. One way to tell is by the way he talks on the radio. You said that you have equipment capable of receiving his transmissions (your computer speakers
According to regulations, all amateur radio stations must identify with their callsign and the callsign of the other party on a regular basis in their contacts. Listen for callsigns -- usually 5-6 characters long with one or more numbers in it -- my callsign is SM0YUF, somebody in the US would probably have a callsign starting with A, N or W, or maybe some other letter that escapes me at the moment. You can look up who owns a certain callsign on http://www.qrz.com/ [qrz.com].
If the transmissions contain no callsigns whatsoever, chances are that he's in fact an illegal CB operator, in which case, in theory, you could contact the FCC using the magic word "CB" rather than "ham radio", and hopefully you might make some progress.
Hope this helps. Oh, and do look into those papers with toroids and ferrites. If he is in fact a licenced radio amateur, he is well within his rights, and your equiment is shoddy. Sorry.
73 de SM0YUF
Re:High-power RF interference (Score:3, Interesting)
They do manage the spectrum. What they don't manage is the receiving devices...
There is a curious problem here caused by the "free market" philosophy taken so to heart by the public at large, the government, and the FCC recently.
The problem is that the TV probably doesn't meet the consumer's needs for keeping out unwanted (and off frequency) RF. The FCC would argue th
Actually, *you* can't cause interferance. (Score:3, Insightful)
He's got all the rights and you've got none.
Re:High-power RF interference (Score:2)
Did you bother to talk to the ham? Most hams are acutely aware that causing interference is not appreciated, and are more than willing to help mitigate the interference without having to involve the FCC. As you found out, as long as the ham is legal, it's your problem. Remember seeing a sticker or paragraph in your user's manual about undesired interference? YOU, as the part 15 device operator, are required to deal with any interference from any licensed service.
As far as running an "illegal" amp, hams are
Re: (Score:2)
Re:High-power RF interference (Score:2)
Don't be so sure its illegal. Now if it was on a CB radio, then yes, highly illegal. But if its legitimate amateur radio gear, then its doubtful that its illegal. We can legally crank some pretty high power. Now, separately, did you approach him (in a friendly way) about the interference to your tv? There are specific filters that he could volunteer to put in his lines to reduce/remove your tv interference. Usually when hams operate on specific fre
Re:High-power RF interference (Score:2)
Investigation revealed that when the coiled handset cords on the phone was stretched to a certain length, the FM signal from the radio station was resonating its way in. The solution was to get shielded handset cables.
Re:High-power RF interference (Score:3, Funny)
It may have been a CB radio with a linear amplifier. Years ago, when I was in high school, a friend had one of these (300W!!!!) and the interference that this thing could generate was insane. When we drove around, we could talk over peoples' landlines (as you mentioned), over fast food drive-thru intercoms, and most memorably, the PA system at the local little league baseball field.
Re:High-power RF interference (Score:5, Funny)
Once I heard one hell of a yelling match, he threatened to kill somebody and bury him in his garage.
Those were the days...
Wonderful.. (Score:5, Interesting)
FWIW I avoid cell phones because the cost is just too damn high for what little I need one for. I'd consider pay-as-you-go without some stupid limit placed upon how soon I need to use up my time or artificial wallet robbing schemes
Re:Wonderful.. (Score:2)
I used to think as you -- that cell phones were too darn costly -- then I ripped out my landline and went cell-only. I spend about the same amount of money as I used to on my landline and I can take my phone with me anywhere. I also get free long distance.
I'm not sure about other pla
legal issue in the US (Score:5, Informative)
I don't know about other places, but using that in the US risks huge fines ($10,000).
I just use my normal cordless (Score:5, Funny)
Comment removed (Score:5, Funny)
Re:I just use my normal cordless (Score:2)
Re:I just use my normal cordless (Score:2)
At least the train crossing goes "Ding Ding Ding Ding" and goes up and down. Puts on a good show.
Is that really a good idea?? (Score:5, Insightful)
I've never been bothered by telemarketers on my cell phone yet. With this, you can get harrassed by them all day long.
With this, you'll need to leave town to get peace and quiet.
Comment removed (Score:4, Informative)
Re:Is that really a good idea?? (Score:2)
1) Give out cell phone number
2) Sue telemarketers who call it
3) Profit!!!
* excellent * (Score:5, Funny)
Lost in someone else's couch? (Score:5, Funny)
Re:Lost in someone else's couch? (Score:2)
Secure (Score:2)
Re:Secure (Score:2)
The phone itself can be easily secured with a belt clip. The signals... well, they can not be easily secured with a belt clip.
So? (Score:2, Insightful)
Don't do it in the U.S. (Score:2, Informative)
*Pages 1--4 from Microsoft Word - 45968.doc* Federal Communications Commission DA 05- 336 Before the Federal Communications Commission Washington, D. C. 20554 In the Matter of Pang Cheng, d/ b as Best Wok 1 Westville, New Jersey File No. EB- 03- PA- 029 NAL/ Acct. No. 200432400001 FRN: 0009- 3455- 62 MEMORANDUM OPINION AND ORDER Adopted: February 7,
Re:Don't do it in the U.S. (Score:5, Funny)
Re:Don't do it in the U.S. (Score:3, Informative)
Re:Don't do it in the U.S. (Score:3, Funny)
Re:Don't do it in the U.S. (Score:2, Informative)
Stationary cell phone? (Score:3, Insightful)
I was a sucker for car phones: much better reception, easier to hold and work with than those tiny cellphones.
I want a 'stationary' cellphone for the house with an antenna on the roof for excellent reception so I don't have to use my tiny little cell phone.
Don't do it in the U.S. (Score:5, Informative)
Bruce
Re:So just use a different frequency (Score:2)
Re:Paragraph 10 kinda bothers me... (Score:4, Informative)
The language about their lack of a license sounds as if "you're damned if you don't", but what it actually says is that they have a history of non- compliance because there was no license for the device found in their posession.
Bruce
More hassle than it's worth? (Score:2, Interesting)
Can't use it inside (Score:2)
Either way, if you want to use your landline anywhere in town (mountains and buildings aside)
That means it doesn't work inside any building, including your own apartment. Sorry, doesn't work for me.
Re:Can't use it inside (Score:2)
Fake ! (Score:5, Informative)
Re:Fake ! (Score:5, Insightful)
That would explain the results you get when entering "Samsung Super Long Range Phone" into google. It's really a shame we can't convince /. editors to google the subjects of stories before submitting them. I guess that's our job.
They normally use HAM radio frequencies or comercial VHF/UHF. Due to the fact that they are only certified in China it is illegal to use in most countries.
This explains why you don't see these for sale in the US anywhere... it's clearly not a new product, and if someone did come up with a way to do this legally ( and in a manner that would allow everyone in town to have such a phone- say a wide-spectrum mesh network device or something ), it'd be big, big news. Too bad this isn't something like that- instead, it's just more crap to clutter HAM frequencies and/or screw up over-the-air broadcasts. Only the stupid and extremely anti-social would even consider purchasing such a thing in most developed countries...
Me, I'm not to afraid of low-level RF emissions- I think my cell phone probably won't give me cancer... but you do have to wonder what sort of radiation *this* sucker puts out...
Nothing to look at here, folks, move along...
Re:Fake ! (Score:5, Funny)
Electromagnetic?
lol
Not a good idea if unlicensed... (Score:5, Informative)
The price of the unit may be cheaper than cell phone bills, but add on that $10,000 fine and seizure of the equipment and it gets real expensive real quick.
And in case you think you're safe because it's in an amateur band, you should note that amateur radio operators practice RDF (Radio Direction Finding) or "Foxhunting" for fun. They will hunt you down, and the FCC accepts evidence from licensed operators in cases against violators.
Jim
Re: (Score:3, Informative)
Re:Not a good idea if unlicensed... (Score:3, Informative)
Not the device in the article. It operates on non-ham frequencies.
With an amateur radio license, you could buy or build something similar that operates on ham frequencies. However, you could only use it for NON-COMMERCIAL puposes. No business is allowed on the ham bands.
Limited number of channels (Score:2)
What frequencies does it run on?
I see it highly likely that if this thing gets popular, it will end up similar to the original wireless phones in the early 80's with one antenna on a high tower that covers an entire city. Unfortunately, only 30 people would be able to use it in a city at one time.
FCC Fine Letters (Score:5, Informative)
http://www.fcc.gov/eb/Orders/2002/DA-02-453A1.htm
http://www.fcc.gov/eb/Orders/2002/DA-02-2474A1.ht
4. On July 27, 2001, agents from the Miami Office visited Lightning's retail store located at 231 E. Flagler Street, Unit #1, Miami, Florida. The agents saw several long-range, cordless telephones on display at the store, including a Super Phone CT-9000, a Prolink CT-6000CID, and an Optima OP8810. A salesperson
offered to sell one of the units to the agents. The long-range cordless telephones displayed at the store were capable of causing serious interference to aviation communications and were
not approved6 by the Commission for use in the United States.
Re:FCC Fine Letters (Score:2)
I think being an FCC agent would be like the FBI, only for geeks. Would I get to carry a gun?
sniff, sniff ... whats that smell? (Score:2)
Oh, great... (Score:4, Funny)
Re:Oh, great... (Score:3, Funny)
Loose != lose.
Embrace it! (Score:2)
Cmon guys - embrace new technology. You remember what it was like without electricity? :)
I think a lot of it is to do with the pricing plans in the US - don't you guys sometimes pay for incoming calls? That's just bizarre
This thing operates in the HAM BANDS??? (Score:2)
From TFA:
Update: Keep in mind, this sort of power may be violating FCC regulation.
My understanding is that transmitting ANY radiated power in that (2-meter) band (or most other bands) that can be detected by others is illegal without an amateur radio license, and the way this thing operates, I'm not sure it would be legal WITH a license.
TFA didn't say, but I'd hope this thing is not being sold in the US
Countermeasures (Score:3, Interesting)
Some guy invented magnetic paint [apci.asso.fr].
Although not an intended purpose, I assume it will work just like anti-cellular wood panels [mercola.com].
And it might even free you from having to wear a tinfoil hat indoors.
240-450Mhz (Score:2, Informative)
I'm not certain,
Re:240-450Mhz (Score:3, Informative)
The more I think about it, this will be outlawed (Score:3, Interesting)
Another sloppy Slashdot title (Score:3)
Looking at this from a different angle (Score:3, Interesting)
However, if one was configured to work within FCC standards, paired with VOIP and a PBX this would be a godsend for a lot of companies and universities that have employees that are far-flung and travel a lot.
My company has a campus with 5,000 employees served by a large number of desktop support technicians weilding pagers and cell phones. With devices like this, the technicians could call each other or anyone in the company over the radio waves for free instead of using cell phones.
I imagine such an application would face strong resistance from the cellular providers, who would resist in the form of dollars into the campaign accounts of politicians responsible for oversight of the FCC.
MUAhahaha (Score:4, Funny)
Ha! I used to do that! (Score:2, Interesting)
Now, the POINT is that I would take our crappy early-90s portable phone across the street with me to her house, and with the basestation properly set up in my house, when my Mom called to check up on me (because I was 'untrustworthy'...ha!), I'd be there