If you’re like most people, you probably toss your receipts the minute you receive them or misplace them as soon as you get home. That can spell disaster if you plan to return an item or to check how much you spent on a purchase a few months down the line. Now, there’s an easy solution to this problem that can save you from becoming frustrated two months later when you need to find the receipt. Enter the portable receipt scanner.
The portable receipt scanner is your tool to manage your receipts in an orderly fashion. This high-tech piece of equipment scans data and images from a receipt and then downloads the digitalized form onto the application of your choice. It can then be saved to just about any file extension you choose. It achieves this feat in record time by using optical character recognition technology, which basically digitalizes hard copy documents.
Here’s a case in point in how this amazing technology can work for you. You come home from a busy day shopping, and normally you would just place the receipts somewhere in the house. Now, with the receipt scanner, you would take the extra five minutes needed to scan all of your day’s receipts. Within that time, you’ll have a digital record of all the money you spent for the day for years to come. Now, if misplace your receipts, at least you have a digital record for eternity. That comes in handy in case you decide to return an item at the store a few weeks later. All you would need to do is print out a copy of the receipt and present it to the clerk. It’s also helpful in case you want to remember how much you spent on an item three months down the line.
If you’re thinking that the portable receipt scanner will take up a lot of room in your home office, guess again. This small little wonder is no bigger than a three-ring hole puncher and weighs only about 17 ounces. And since it only requires a simple USB cable to be hooked up to your computer or laptop, it can fit in just about any corner of your home office.
The portable receipt scanner brings order to your life.
Because of its small size, the portable scanner can easily be taken on business trips.
Thursday, June 25, 2009
Sunday, May 24, 2009
No Need to Duplicate your Work with a Duplex Scanner
Scanning hundreds of papers can be quite time consuming. You have to insert the documents into the scanner each and every time, and if they’re double-sided, it’s twice the work. Just imagine if that’s only a portion of the work that you have to. It won’t leave you any time to finish the rest of your duties; that is, unless your office has a duplex scanner.
The duplex scanner is truly an amazing piece of equipment. This device can scan in half the time of a regular, non-duplex scanner. Here’s how it works. You simply insert the double-sided document into the scanner and within seconds, both sides are uploaded to your computer within a matter of seconds. It achieves this amazing feat by using optical character recognition (OCR) technology, which digitizes both data and images from a hard piece of document. It then takes this digitized data and images (through the use of its bundled software) and uploads it to whichever application you choose, which can then be saved to any type of file extension.
Just imagine how much time a duplex scanner can save you in normal workweek. Let’s say that you’re working in a high-pressure lawyer’s office and you have 10 different legal briefs to upload and send to your boss, all within a couple of hours. With a normal scanner, it might take you almost the whole day to complete the job. With a duplex scanner, however, your workload is cut in half. You would simply need to insert the documents one time only into the scanner, and before you realize it, your 10 different legal briefs are ready to be emailed to your boss.
Not only is the duplex scanner a true time-saver, it also takes up hardly any space in the office; its dimensions are no larger than a three-ring hole puncher. It’s also so lightweight that it can be taken from room to room, so that more than one person could use it. And since it has its own power source (needs a simple USB cable to be connected to the computer), it can literally be taken to just about anywhere in the office setting. In fact, it’s so small and lightweight that it can easily fit in a computer briefcase if you need to scan and upload additional legal briefs at your home.
Scan documents in half the time with a duplex scanner. It scans both sides of documents simultaneously.
The duplex scanner is truly an amazing piece of equipment. This device can scan in half the time of a regular, non-duplex scanner. Here’s how it works. You simply insert the double-sided document into the scanner and within seconds, both sides are uploaded to your computer within a matter of seconds. It achieves this amazing feat by using optical character recognition (OCR) technology, which digitizes both data and images from a hard piece of document. It then takes this digitized data and images (through the use of its bundled software) and uploads it to whichever application you choose, which can then be saved to any type of file extension.
Just imagine how much time a duplex scanner can save you in normal workweek. Let’s say that you’re working in a high-pressure lawyer’s office and you have 10 different legal briefs to upload and send to your boss, all within a couple of hours. With a normal scanner, it might take you almost the whole day to complete the job. With a duplex scanner, however, your workload is cut in half. You would simply need to insert the documents one time only into the scanner, and before you realize it, your 10 different legal briefs are ready to be emailed to your boss.
Not only is the duplex scanner a true time-saver, it also takes up hardly any space in the office; its dimensions are no larger than a three-ring hole puncher. It’s also so lightweight that it can be taken from room to room, so that more than one person could use it. And since it has its own power source (needs a simple USB cable to be connected to the computer), it can literally be taken to just about anywhere in the office setting. In fact, it’s so small and lightweight that it can easily fit in a computer briefcase if you need to scan and upload additional legal briefs at your home.
Scan documents in half the time with a duplex scanner. It scans both sides of documents simultaneously.
Thursday, April 23, 2009
Automating your Business Card Rolodex
If you’re still one of those of people who utilize an old-fashioned Rolodex with business cards stapled to each card, then it’s time to jump into the 21st century and automate your business card filing system. Besides typing in the information to a palm pilot or your cell phone (two systems that have their pluses and minuses), consider utilizing the amazing business card scanner.
A business card scanner can easily automate your antiquated Rolodex system. Not only will you have a system that’s more organized and efficient, but you’ll also be able to utilize the information even when you’re not in your office and you need to contact the vendors or a client on the road. Here’s how it works. The business card scanner scans and reads data and images from a business card through the use of optical character recognition technology. That technology is able to digitalize the information and images with a simple swipe of the card, and within seconds, you’ll have a digitalized version of the card uploaded to a PDF file (through use of the bundled software). That information can then be saved to just about any application of your choice, such as a JPG, TGA, PCD, or PCX extension. In essence, you’ll have a file saved on your computer or laptop that is accessible from just about anywhere.
Picture the following case. You swipe several business cards of some of your new clients through the business card scanner. The information is now uploaded to your laptop. Two weeks later you go on a business trip and you need to contact your new clients. Previously, with the antiquated Rolodex system, you would have to wait for someone in the office to retrieve the information for you. That could present a huge problem in case you were traveling in a time zone that was hours ahead. With use of the business card scanner, all you would need to do is turn on your computer and search for your business card contact folder. Within seconds you would have the name, address and phone numbers of your new clients. You would not waste time waiting for your home office to open, nor need to embarrass yourself by asking your fellow employees for contact information.
The business card scanner organizes business cards with one simple scan. It uploads data and images within seconds to a PDF file.
A business card scanner can easily automate your antiquated Rolodex system. Not only will you have a system that’s more organized and efficient, but you’ll also be able to utilize the information even when you’re not in your office and you need to contact the vendors or a client on the road. Here’s how it works. The business card scanner scans and reads data and images from a business card through the use of optical character recognition technology. That technology is able to digitalize the information and images with a simple swipe of the card, and within seconds, you’ll have a digitalized version of the card uploaded to a PDF file (through use of the bundled software). That information can then be saved to just about any application of your choice, such as a JPG, TGA, PCD, or PCX extension. In essence, you’ll have a file saved on your computer or laptop that is accessible from just about anywhere.
Picture the following case. You swipe several business cards of some of your new clients through the business card scanner. The information is now uploaded to your laptop. Two weeks later you go on a business trip and you need to contact your new clients. Previously, with the antiquated Rolodex system, you would have to wait for someone in the office to retrieve the information for you. That could present a huge problem in case you were traveling in a time zone that was hours ahead. With use of the business card scanner, all you would need to do is turn on your computer and search for your business card contact folder. Within seconds you would have the name, address and phone numbers of your new clients. You would not waste time waiting for your home office to open, nor need to embarrass yourself by asking your fellow employees for contact information.
The business card scanner organizes business cards with one simple scan. It uploads data and images within seconds to a PDF file.
Thursday, March 12, 2009
The Duplex Scanner – it cuts Down the Workload by Half
Working in an average office entails lots of paperwork. That’s whether the office is a real estate office, a lawyer’s office, a doctor’s office, or just about any modern day office setting. Besides the normal running of an office, a huge part of the job is paperwork. Paperwork can be overwhelming, and can become insurmountable in a short period of time. Without a real good system, the amount of paperwork can get out of hand in as little as one week’s time, depending upon the type of office. That can all change, however, with the use of a duplex scanner.
The duplex scanner acts like a regular scanner, but has twice the bite. Like a regular scanner, it reads, scans, and then uploads the digitalized version to your computer in seconds. However, what’s unique about this type of scanner is that it does all of these functions for both sides of a document at one time. No longer do you have to feed the scanner twice to read both sides of the page. That means that your workload has just been cut in half!
This amazing scanning device can also scan, read, and digitalize images. That means if there are photos that need to be uploaded, it can be done with one simple scan, even if there are images on both sides of a document. It can even read images on ID cards such as a passport or driver’s license. Business cards can also be scanned and uploaded to a PDF file that can then be saved to any file of your choice.
What’s great about this duplex scanner is that it’s so small and compact that it fits just about anywhere in the office. There’s no need to reserve a special area for its use. It’s about the size of an oversized stapler. It’s also light weight enough (17ounces) to take from one office to the next in case more than one staff person needs to use it. That means that the office doesn’t need more than one or two of these scanners, even for a big office. However, once the staff uses it, they problem won’t want to part with it!
The duplex scanner scans and reads both sides of a document with one easy scan.
The duplex scanner acts like a regular scanner, but has twice the bite. Like a regular scanner, it reads, scans, and then uploads the digitalized version to your computer in seconds. However, what’s unique about this type of scanner is that it does all of these functions for both sides of a document at one time. No longer do you have to feed the scanner twice to read both sides of the page. That means that your workload has just been cut in half!
This amazing scanning device can also scan, read, and digitalize images. That means if there are photos that need to be uploaded, it can be done with one simple scan, even if there are images on both sides of a document. It can even read images on ID cards such as a passport or driver’s license. Business cards can also be scanned and uploaded to a PDF file that can then be saved to any file of your choice.
What’s great about this duplex scanner is that it’s so small and compact that it fits just about anywhere in the office. There’s no need to reserve a special area for its use. It’s about the size of an oversized stapler. It’s also light weight enough (17ounces) to take from one office to the next in case more than one staff person needs to use it. That means that the office doesn’t need more than one or two of these scanners, even for a big office. However, once the staff uses it, they problem won’t want to part with it!
The duplex scanner scans and reads both sides of a document with one easy scan.
Saturday, July 12, 2008
Asus U2 Luxury Ultraportable
Continuing the series of ultraportable notebooks, Asus has released its latest ultraportable luxury notebook, the U2 ultraportable. It weighs a mere 2.75 lbs and has an 11.1 inch screen. The processor is Intel Core Duo ULV (Ultra Low Voltage) with Intel GM965 Express Chipset. This notebook has low power consumption and features a 4GB RAM. The users have the option of a 120GB hard drive or 32GB solid state drive. Asus has included a fingerprint reader and Trusted Platform Module (TPM) to enhance security. The in built webcam performs a face detection scan of the rightful owner to grant access. It features Windows Vista OS but its price and availability are not yet confirmed.
Sunday, June 8, 2008
WIRELESS TECHNOLOGY
WIRELESS TECHNOLOGY IS SOMEWHAT SIMILAR TO WIRED TECHNOLOGY.AS IN BOTH OF THE TCHNOLOGIES THERE IS AN HARDWARE USED TO SEND AND RECIEVE DATA.FOR BOTH WIRED AND WIRELESS TECHNOLOGY, RANGE OF TRANSMISSION IS AN ISSUE AND FIXED.FOR EXAMPLE U CANT MOVE UR LAP-TOP FOR MORE THAN 15 FEETS FROM WIRELESS WALL JACK,SIMILAR WITH THE CASE OF 15 FEET WIRE.
ONLY DIFFERENCE IN WIRELESS AND WIRED TECHNOLOGY IS THE METHOD OF CONNECTION AND THE RANGE PROVIDE BY THE PROVIDER. EG-HOME BASE PHONES CONNECTED WITH WIRES HAV LESS RANGE,DEPENDS ON THE LENGTH OF WIRE,WHERE AS OUR MOBILE PHONES WORKS ALL AROUND THE WORLD AS IT DIRECTLY OPERATES FROM THE SATTELITE.DIFFERENT TYPE OF WIRELESS SOLUTION CAN COMMUNICATE 10 FEET,10 MILES,OR WITH A SATTELITE IN A ORBIT SAME IN A CASE OF MOBILE PHONE WHICH WE DISCUSSED ABOVE.
IT MAY BE OF THREE TYPES-
1-PERSONAL AREA NETWORK (PAN)
2-LOCAL AREA NETWORK (LAN)
3-WIDE AREA NETWORK (WAN)
1-PERSONAL AREA NETWORK (PAN)-THIS NETWORKS WORKS BETWEEN TWO HARDWARE APPLICATIONS,AS ITS FILE TRANSFER RANGE IS VERY SHORT.ITS BANDWIDTH IS ALSO NOT SO IMPRESSIVE I-E ONLY UPTO 1 MB PER SECOND.FOR EXAMPLES-
a. TWO CHILDREN CONNECT TO PERSONAL NETWORK ON WI-FI AND PLAYING SAME GAME ON THEIR COMPUTER.
b. IRDA AND BLUETOOTH
BLUETOOTH IS ESSENTIALLY AN CABLE ELIMINATOR DEVICE, AS IT DOES NOT REQUIRE ANY SOUGHT OF CABLE FOR SHARING.ITS RANGE IS VERY SHORT,LIMITED TO ABOUT 10 METERS.ALWAYS REMEMBER BLUETOOTH IS NOT AN WIRELESS EXTENSION OF THE CORPORATE LOCAL AREA NETWORK.
2-LOCAL AREA NETWORK (LAN)-THIS NETWORK IS VERY FAMOUS NOW A DAYS,IN THIS MANY COMPUTERS ARE CONNECTED THROUGH A MAIN SERVER AND BROWSE NET,SHARING FILES,SHARING HARDWARES ETC.THIS NETWORKS WORKS IN A PERTICULAR RANGE DEPENDS UPON THE SERVER.AN EXTENSION OF AN EXISTING CORPORATE WIRED LAN.ITS BANDWIDTH IS VERY GOOD ,I-E- 5 MB PER SECOND.FOR EXAMPLE- 802.11
HERE 802.11 IS AN KEY TECHNOLOGY HERE.IT ESSENTIALLY PROVIDES A WIRELESS EXTENSION OF YOUR EXISTIN CORPORATE LAN.IT GENERALLY COMES WITH THE THREE VERSIONS-
a) 802.11b –THIS VERSION OF 802.11 IS CURRENTLY WIDELY DEPLOYED.
b) 802.11a –THIS VERSION OF 802.11 PROVIDES HIGHER BANDWIDTH.
c) 802.11g –IT OFFERS HIGHER BANDWIDTH AND ALSO IT IS BACKWARD COMPATIBLE WITH 802.11b.
3-WAN-IN THIS NETWORKS MANY COMPUTERS ARE CONNECTED FROM EACH OTHER THROUGH A SINGLE SERVER AND DO SHARING,BROWSING ETC.THIS WORKS SIMILARLY ON THE BASIS OF LAN BUT THE ONLY DIFFERENCE IS ITS RANGE AND ITS BANDWIDTH WHICH IS VERY LOW AS COMPARED TO LAN OR PAN. ITS BANDWIDTH IS GENERALLY OF RANGE 14.4 KBS PER SECOND, NOT MORE THAN THAT.IT GENERALLY USES A DIAL UP CONNETION TO CONNECT THROUGH SERVER.IT PROVIDE ESSENTIALLY A WORLD WIDE ACCESS.IT USES GENERALLY A DIGITAL CELLULAR NETWORKS.FOR EXAMPLES-CELLULARS AND CDPD
WIRELESS TECHNOLOGY’S IMPACTS
THROUGHOUT THE WORLD,WIRELESS TECHNOLOGIES ARE BEING ADOPTED AT DIFFERENT RATES.DEVELOPED NATIONS QUICKLY ADOPTED MOBILE TECHNOLOGY AND SUBCULTURE OF USERS HAVE DEVELOPED.IN DEVELOPING NATIONS MUCH HAS BEEN PROMISED OF WIRELESS TECHNOLOGIES TO CHANGE PEOPLE’S PERSONAL,ECONOMIC AND POLITICAL SITUATIONS AS SOON AS POSSIBLE.MANY REPORTS SUGGEST THAT WIRELESS TECHNOLOGIES ARE TAKING HOLD IN DEVELOPED AND DEVELOPING COUNTRIES ALIKE,SPREDING EVEN FASTER THAN RADIO,T.V,AND TELEPHONES AND REVOLUTIONIZE THE TELECOMMUNICATIONS.IN ONE SURVEY THIS FACT IS PROVED THAT THERE ARE 1.5 BILLION USERS WHO USE CELL PHONES ALONG WITH 250 MILLION MOBILE INTERNET USERS.THUS WE NEED TO CONSIDER WIDESPREAD ADOPTION OF WIRELESS TECHNOLOGIES.
ONLY DIFFERENCE IN WIRELESS AND WIRED TECHNOLOGY IS THE METHOD OF CONNECTION AND THE RANGE PROVIDE BY THE PROVIDER. EG-HOME BASE PHONES CONNECTED WITH WIRES HAV LESS RANGE,DEPENDS ON THE LENGTH OF WIRE,WHERE AS OUR MOBILE PHONES WORKS ALL AROUND THE WORLD AS IT DIRECTLY OPERATES FROM THE SATTELITE.DIFFERENT TYPE OF WIRELESS SOLUTION CAN COMMUNICATE 10 FEET,10 MILES,OR WITH A SATTELITE IN A ORBIT SAME IN A CASE OF MOBILE PHONE WHICH WE DISCUSSED ABOVE.
IT MAY BE OF THREE TYPES-
1-PERSONAL AREA NETWORK (PAN)
2-LOCAL AREA NETWORK (LAN)
3-WIDE AREA NETWORK (WAN)
1-PERSONAL AREA NETWORK (PAN)-THIS NETWORKS WORKS BETWEEN TWO HARDWARE APPLICATIONS,AS ITS FILE TRANSFER RANGE IS VERY SHORT.ITS BANDWIDTH IS ALSO NOT SO IMPRESSIVE I-E ONLY UPTO 1 MB PER SECOND.FOR EXAMPLES-
a. TWO CHILDREN CONNECT TO PERSONAL NETWORK ON WI-FI AND PLAYING SAME GAME ON THEIR COMPUTER.
b. IRDA AND BLUETOOTH
BLUETOOTH IS ESSENTIALLY AN CABLE ELIMINATOR DEVICE, AS IT DOES NOT REQUIRE ANY SOUGHT OF CABLE FOR SHARING.ITS RANGE IS VERY SHORT,LIMITED TO ABOUT 10 METERS.ALWAYS REMEMBER BLUETOOTH IS NOT AN WIRELESS EXTENSION OF THE CORPORATE LOCAL AREA NETWORK.
2-LOCAL AREA NETWORK (LAN)-THIS NETWORK IS VERY FAMOUS NOW A DAYS,IN THIS MANY COMPUTERS ARE CONNECTED THROUGH A MAIN SERVER AND BROWSE NET,SHARING FILES,SHARING HARDWARES ETC.THIS NETWORKS WORKS IN A PERTICULAR RANGE DEPENDS UPON THE SERVER.AN EXTENSION OF AN EXISTING CORPORATE WIRED LAN.ITS BANDWIDTH IS VERY GOOD ,I-E- 5 MB PER SECOND.FOR EXAMPLE- 802.11
HERE 802.11 IS AN KEY TECHNOLOGY HERE.IT ESSENTIALLY PROVIDES A WIRELESS EXTENSION OF YOUR EXISTIN CORPORATE LAN.IT GENERALLY COMES WITH THE THREE VERSIONS-
a) 802.11b –THIS VERSION OF 802.11 IS CURRENTLY WIDELY DEPLOYED.
b) 802.11a –THIS VERSION OF 802.11 PROVIDES HIGHER BANDWIDTH.
c) 802.11g –IT OFFERS HIGHER BANDWIDTH AND ALSO IT IS BACKWARD COMPATIBLE WITH 802.11b.
3-WAN-IN THIS NETWORKS MANY COMPUTERS ARE CONNECTED FROM EACH OTHER THROUGH A SINGLE SERVER AND DO SHARING,BROWSING ETC.THIS WORKS SIMILARLY ON THE BASIS OF LAN BUT THE ONLY DIFFERENCE IS ITS RANGE AND ITS BANDWIDTH WHICH IS VERY LOW AS COMPARED TO LAN OR PAN. ITS BANDWIDTH IS GENERALLY OF RANGE 14.4 KBS PER SECOND, NOT MORE THAN THAT.IT GENERALLY USES A DIAL UP CONNETION TO CONNECT THROUGH SERVER.IT PROVIDE ESSENTIALLY A WORLD WIDE ACCESS.IT USES GENERALLY A DIGITAL CELLULAR NETWORKS.FOR EXAMPLES-CELLULARS AND CDPD
WIRELESS TECHNOLOGY’S IMPACTS
THROUGHOUT THE WORLD,WIRELESS TECHNOLOGIES ARE BEING ADOPTED AT DIFFERENT RATES.DEVELOPED NATIONS QUICKLY ADOPTED MOBILE TECHNOLOGY AND SUBCULTURE OF USERS HAVE DEVELOPED.IN DEVELOPING NATIONS MUCH HAS BEEN PROMISED OF WIRELESS TECHNOLOGIES TO CHANGE PEOPLE’S PERSONAL,ECONOMIC AND POLITICAL SITUATIONS AS SOON AS POSSIBLE.MANY REPORTS SUGGEST THAT WIRELESS TECHNOLOGIES ARE TAKING HOLD IN DEVELOPED AND DEVELOPING COUNTRIES ALIKE,SPREDING EVEN FASTER THAN RADIO,T.V,AND TELEPHONES AND REVOLUTIONIZE THE TELECOMMUNICATIONS.IN ONE SURVEY THIS FACT IS PROVED THAT THERE ARE 1.5 BILLION USERS WHO USE CELL PHONES ALONG WITH 250 MILLION MOBILE INTERNET USERS.THUS WE NEED TO CONSIDER WIDESPREAD ADOPTION OF WIRELESS TECHNOLOGIES.
Sunday, June 1, 2008
Bluetooth - The New And Advanced Technology
Bluetooth is the advance tehnology mainly used to establish wireless connection between two bluetooth enable devices.
it has some limited range,this is the the only problem with this.on other hand it has many advantages too which discuss later.
It is a cable-replacement technology,which generally means technology using short-range radio links,
intended to replace the cables connecting portable and/or fixed electronic devices i-e it is totally wireless.
Bluetooth conceived initially by Ericsson in 1994,
set to commercially come out in bulk around 2002. In this,
small chip (radio chip) is to be plugged into bluetooth devices like -computers, printers,
mobile phones, etc.
SOME INTERESTING AND USEFULL INFORMATION ABOUT BLUETOOTH
i. The Bluetooth Special Interest Group (SIG) was founded by Ericsson, IBM, Intel, Nokia and Toshiba in February 1998, to develop an open specification for short-range wireless connectivity.
ii. Bluetooth devices within 10m can share up to 720kbps of capacity
iii. Projected cost for a Bluetooth chip is low + its low power consumption, means you could literally place one anywhere
iv. It Can operate on both circuit and packet switching modes, providing both synchronous and asynchronous data services.
v. It is intended to support an open-ended list of applications, including data, audio, graphics and even video.
BLUETOOTH MUST BE ABLE TO –
Recognize any other Bluetooth device in radio range
Permit easy connection of these devices
Be aware of the device types
Support service discovery
Support connectivity aware applications
EXAMPLES OF BLUETOOTH USES -
• Cheching email: access email while the PC is still in the briefcase; when PC receives an email, you are notified through the mobile phone. Use the mobile phone to browse the email.
• Cordless desktop: connect your desktop/laptop cordlessly to printers, scanner, keyboard, mouse, etc.
BLUETOOTH ARCHITECTURE -
In bluetooth technology up to 8 devices can communicate in a small network, called piconet.10 piconets can coexist in the same coverage range of the Bluetooth radio.Each piconet has 1 MASTER and the rest serve as SLAVES. SLAVES within a piconet only have links to the MASTER.
PHYSICAL LINKS -
Synchronous Connection Oriented (SCO) : allocates a fixed bw between a point-to-point connection involving the master and one slave. The master reserves slots periodically. It primarily supports time-bounded information like voice. SCO packets do not include a CRC and are never retransmitted.The master can support up to 3 simultaneous SCO links
Asynchronous connectionless (ACL) : a point-to-multipoint link between the master and all slaves in the piconet. Packet-switch style of connectionNo bw reservation possible.Delivery may be guaranteed thru error detection and retransmission.Only single ACL link can exist.
BLUETOOTH LIMITATIONS -
Does not address routing, most network functions are pushed into the link layer.Does not support multi-hop multicasting.Does not address how to cope with mobility. No. of nodes in piconet is limited.Does not address power-saving methods done at upper layers, above the link-layer.
CONCLUSION –
Bluetooth is a global, RF-based (ISM band: 2.4GHz), short-range, connectivity solution for portable, personal devices.it is not just a radio, it is an end-to-end solution.Implanting Bluetooth technology in a single chip will allow many devices to be Bluetooth-enabledLimitations of Bluetooth need to be addressed
THE REAL IMPACT OF BLUETOOTH STILL TO BE SEEN…….VERY SOON
it has some limited range,this is the the only problem with this.on other hand it has many advantages too which discuss later.
It is a cable-replacement technology,which generally means technology using short-range radio links,
intended to replace the cables connecting portable and/or fixed electronic devices i-e it is totally wireless.
Bluetooth conceived initially by Ericsson in 1994,
set to commercially come out in bulk around 2002. In this,
small chip (radio chip) is to be plugged into bluetooth devices like -computers, printers,
mobile phones, etc.
SOME INTERESTING AND USEFULL INFORMATION ABOUT BLUETOOTH
i. The Bluetooth Special Interest Group (SIG) was founded by Ericsson, IBM, Intel, Nokia and Toshiba in February 1998, to develop an open specification for short-range wireless connectivity.
ii. Bluetooth devices within 10m can share up to 720kbps of capacity
iii. Projected cost for a Bluetooth chip is low + its low power consumption, means you could literally place one anywhere
iv. It Can operate on both circuit and packet switching modes, providing both synchronous and asynchronous data services.
v. It is intended to support an open-ended list of applications, including data, audio, graphics and even video.
BLUETOOTH MUST BE ABLE TO –
Recognize any other Bluetooth device in radio range
Permit easy connection of these devices
Be aware of the device types
Support service discovery
Support connectivity aware applications
EXAMPLES OF BLUETOOTH USES -
• Cheching email: access email while the PC is still in the briefcase; when PC receives an email, you are notified through the mobile phone. Use the mobile phone to browse the email.
• Cordless desktop: connect your desktop/laptop cordlessly to printers, scanner, keyboard, mouse, etc.
BLUETOOTH ARCHITECTURE -
In bluetooth technology up to 8 devices can communicate in a small network, called piconet.10 piconets can coexist in the same coverage range of the Bluetooth radio.Each piconet has 1 MASTER and the rest serve as SLAVES. SLAVES within a piconet only have links to the MASTER.
PHYSICAL LINKS -
Synchronous Connection Oriented (SCO) : allocates a fixed bw between a point-to-point connection involving the master and one slave. The master reserves slots periodically. It primarily supports time-bounded information like voice. SCO packets do not include a CRC and are never retransmitted.The master can support up to 3 simultaneous SCO links
Asynchronous connectionless (ACL) : a point-to-multipoint link between the master and all slaves in the piconet. Packet-switch style of connectionNo bw reservation possible.Delivery may be guaranteed thru error detection and retransmission.Only single ACL link can exist.
BLUETOOTH LIMITATIONS -
Does not address routing, most network functions are pushed into the link layer.Does not support multi-hop multicasting.Does not address how to cope with mobility. No. of nodes in piconet is limited.Does not address power-saving methods done at upper layers, above the link-layer.
CONCLUSION –
Bluetooth is a global, RF-based (ISM band: 2.4GHz), short-range, connectivity solution for portable, personal devices.it is not just a radio, it is an end-to-end solution.Implanting Bluetooth technology in a single chip will allow many devices to be Bluetooth-enabledLimitations of Bluetooth need to be addressed
THE REAL IMPACT OF BLUETOOTH STILL TO BE SEEN…….VERY SOON
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