Solved

Bluetooth Transmitter - long range and short range

Posted on 2006-06-12
9
901 Views
Last Modified: 2013-12-14

Hello experts,
        This is not a programming question. But I think someone in this group might be able to answer this.

         I know there are long-range (~100m) blue-tooth transmitters available. I'm just wondering whether they can
communicate with short-range devices (like cell phones). The thing that confuses me is: a cellphone blue-tooth has only 10m range. Suppose a cell phone is located at 90 meters from a long-range transmitter. Can it communicate with the transmitter ? If not, what is the use of long range transmitters ?

thanks
0
Comment
Question by:mxjijo
  • 3
  • 2
9 Comments
 
LVL 4

Expert Comment

by:eminemence
ID: 16934701
Check this site that has done most of the work in this field:
http://trifinite.org/trifinite_downloads.html#papers
Also some more stuff:
http://www.tomsnetworking.com/2005/03/08/how_to_bluesniper_pt1/
http://www.tgdaily.com/2004/08/02/defcon_12/index.html
As far as some theory behind it got to check some books for that ;).
Hope this helps.
--eminemence.
0
 
LVL 6

Expert Comment

by:WilliamFrantz
ID: 17235540
> Suppose a cell phone is located at 90 meters from
> a long-range transmitter. Can it communicate with
> the transmitter?

The phone could receive signals from the base station but it would not have enough power to transmit a reply to the station.

> If not, what is the use of long range transmitters?

You could use two long range stations to communicate with each other (i.e. a network bridge).  It also works fine if your phone is 10 meters from the station.
0
 
LVL 8

Author Comment

by:mxjijo
ID: 17237423

hmm.. interesting..

then what does this product description mean ?
It says it can connect to mobile phones 100 mtrs away from the transmitter

http://catalog.belkin.com/IWCatProductPage.process?Product_Id=273100
0
VMware Disaster Recovery and Data Protection

In this expert guide, you’ll learn about the components of a Modern Data Center. You will use cases for the value-added capabilities of Veeam®, including combining backup and replication for VMware disaster recovery and using replication for data center migration.

 
LVL 6

Accepted Solution

by:
WilliamFrantz earned 250 total points
ID: 17237872
> then what does this product description mean ?
> It says it can connect to mobile phones 100 mtrs
> away from the transmitter

Actually, the description says, "Provides cable-free connections to devices up to 100 meters away".  They never promise that range from a "phone".

In other words, if you took two of the Belkin F8T012v adapters to the Bonneville Salt Flats in Utah, they may actually be able to create a 100 meter wireless connection.  Your mileage may vary.
0
 
LVL 8

Author Comment

by:mxjijo
ID: 17277316

I tested it.
It does work for more wider range.
I did not test all the way upto 100 meters, but it was definitly more than 40 miters.
And yes, as I experinced line of sight issues at longer range

thanks
~j
0
 
LVL 8

Author Comment

by:mxjijo
ID: 17606077

Venabili,
    I don't mind giving WilliamFrantz points, but his answer is not fully correct.
As I mentioned in my comments I tested it and it does communicate over wider range.

~j
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

With the purchase of CloudCommand by Comcast customers are left in a bind as subscriptions expire and render the AP's disabled. The following will explain how to flash your Ubiquiti AP's with CloudCommand firmware back to Ubiquiti firmware. HOWTO…
DECT technology has become a popular standard for wireless voice communication. DECT devices are not likely to be affected by other electronic devices and signals because they operate in a separate frequency-band.
This Micro Tutorial will show you how to maximize your wireless card to its maximum capability. This will be demonstrated using Intel(R) Centrino(R) Wireless-N 2230 wireless card on Windows 8 operating system.
Viewers will learn how to connect to a wireless network using the network security key. They will also learn how to access the IP address and DNS server for connections that must be done manually. After setting up a router, find the network security…

840 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question