SyncML Introduction
1 SyncML Framework
This specification can be implemented by using the SyncML interface from the SyncML Framework (See Figure 2). Not all the features of the SyncML Interface need to be implemented to comply with this specification.
1.1.1 Figure 2 SyncML Framework
The application “A” depicts a networked service that provides data synchronization service for other applications, in this case application “B”, on some networked device. The service and device are connected over some common network transport, such as HTTP.
In the figure above, the ‘Sync Engine’ functionality is completely placed onto the OMA DS server side even if some OMA DS client implementations can in practice provide some sync engine functionality, too. The ‘Sync Server Agent’ and the ‘Sync Client Agent’ use the protocol defined in this specification and the representation protocol [DSREPU] offered by the SyncML interface (‘SyncML I/F’) to communicate with each other.
2 Device Roles
Figure 3 depicts a synchronization example in which a mobile phone acts as an OMA DS client and a server acts as an OMA DS server. The client sends SyncML message including the data modifications made in the client to the server. The server synchronizes the data (including possible additions, replaces, and deletions) within the SyncML messages with data stored in the server. After that, the server returns its modifications back to the client.
2.1.1 Synchronization Example with Mobile Phone and Server
The example presented the figure above is very simple. However, this example describes the roles of the devices in this specification. That is:
SyncML Client – This is the device that contains a sync client agent and that sends first its modifications to the server. The client MUST also be able to receive responses from the SyncML server. Although the SyncML client has always the role to send its modifications first, in some cases the server can have a role to initiate synchronization. The SyncML client is typically a mobile phone, PC, or PDA device.
SyncML Server – This is the device, which contains a sync server agent and sync engine, and which usually waits that the SyncML client starts synchronization and sends the clients modification to the server. The server is responsible for processing the sync analysis when it has received the client modifications. In addition, it can be able to initiate synchronization if unsolicited commands from the server to the client are supported on the transport protocol level. Typically, the SyncML server is a server device or PC.
3 Sync Types
| Sync Scenario | Description |
| Two-way sync | A normal sync type in which the client and the server exchange information about modified data in these devices. The client sends the modifications first. |
| Slow sync | A form of two-way sync in which all items are compared with each other on a field-by-field basis. In practice, this means that the client sends all its data from a database to the server and the server does the sync analysis (field-by-field) for this data and the data in the server. |
| One-way sync from client only | A sync type in which the client sends its modifications to the server but the server does not send its modifications back to the client. |
| Refresh sync from client only | A sync type in which the client sends all its data from a database to the server (i.e., exports). The server is expected to replace all data in the target database with the data sent by the client. |
| One-way sync from server only | A sync type in which the client gets all modifications from the server but the client does not send its modifications to the server. |
| Refresh sync from server only | A sync type in which the server sends all its data from a database to the client. The client is expected to replace all data in the target database with the data sent by the server. |
| Server Alerted Sync | A sync alert type, which provides the means for a server to alert the client to perform synchronization. When the server alerts the client, it also tells it which type of synchronization to initiate. |
Overview of the Latest, Most Popular Lexmark Printers
Within the last few months, Lexmark has released several new laser printers that are gaining recognition among home users, small business offices, and large corporations.
Lexmark X460 Series
The Lexmark X460 printers pack powerful performance and enhanced productivity into a compact device. Designed specially for small and medium-sized workgroups, this new line of printers are small enough to fit on a desktop and still deliver easy access to a range of features through the customizable touch screen. Some of these features include advanced copying, two-sided scanning, and simple user authentication for increased security.
Lexmark X360 Series
If you’re looking for a multifunction, user-friendly device that delivers great results every time, check out Lexmark’s new X360 series of printers. These small, network-ready devices come with a 50-sheet automatic document feeder and an optional paper drawer that allows you to expand the paper capacity by up to 850 sheets. With the Lexmark X360 printers, you’ll enjoy advanced scanning capabilities and sharp, professional-quality results with up to 1,200 dpi print quality.
Lexmark X540 Series
Ideal for small workgroups and businesses, the Lexmark X540 series of color laser printers introduce a bold new design that allows for excellent functionality and high-quality color printing technology. These printers are specially designed to be environmentally friendly with features such as two-sided printing, which reduces paper waste and instant warm-up fuser technology, which uses less power when not in use.
Lexmark C540 Series
The Lexmark C540 series of printers comes with a unique four-in-one color laser print head that produces sharp, bold color for improved images and graphics. These high-performance devices offer fast print speeds, competitive prices and a surprising set of features. For instance, there’s an Eco-Mode option which reduces power consumption, and a Quiet Mode which reduces noise emissions. You can also purchase a wireless model that’s built with the latest Wi-Fi technology, supporting a longer range and faster transfer rates. Designed to save you time and money, the C540 series uses extra high-yield cartridges with a lower cost per page.
Lexmark X7675 PRO
The Lexmark X7675 Professional all-in-one printer gives business offices and home users an easy-to-use device with advanced wireless connectivity. The X7675 surpasses most in its class in terms of output, convenience and price. Featuring a multiple card reader with USB port, this multifunction device is perfect for reading photos with PictBridge software. You can view your images on the large color display, and then make the necessary adjustments before printing them out.
Posted in: Internet Topic| Tags: Device Business Lexmark Printer X460 home technology print laser series paper colorUnderstanding the Basics of Wireless Printing
Wireless printing is becoming more and more popular among today’s business offices, large corporations, and even home users. Designed to eliminate the hassle of messy cords and unplugging machines, wireless printing allows you to print from any PC on the network. In the following article, we’ll go over some of the advantages of wireless printing, including the reasons why this technology can save you valuable time and money.
Mobility: Now you can print from anywhere in your home or office without being physically attached to your printing device. The latest WiFi technology offers much greater range than Bluetooth—approximately 300 feet.
Shared Printing: With a wireless network and printer, you don’t need to buy a printing device for every desk. Instead, several employees can send commands to the same printer from anywhere in the office.
No wires: All you need to get started is a computer, a WiFi enabled printer, and a wireless network (with a wireless router and ISP service, if you want to be connected to the Internet). This means your office can be free of cords and clutter, which also saves an average of $300-$600 for every network jack you don’t have to plug in.
Speed: WiFi printing, especially with the recent advancements in networking standards, is the fastest wireless technology to date—approximately 54 Mbps. There are several versions of the 802.11 wireless standards. However, the basic rule of thumb is that the higher the letter of the alphabet, the more speed. In other words, devices on a 802.11g network will operate faster than those on a 802.11b network.
Ease of Use: You might actually be surprised to find out how easy it is to set up and use a wireless network. Basically there are four simple steps involved in the installation process: 1) Download and install the appropriate printer driver; 2) Open the Control Panel and click “Add a printer” on the toolbar; 3) Select “Hardware and sound”; 4) Choose “Add a network, wireless or Bluetooth printer” and then select your wireless printer when it appears.
Security: All you need to do to secure a wireless printer is simply add it to the virtual private network (VPN). Nowadays, three out of four companies with more than 50 employees have a secure VPN. The other main reason for the increased security among wireless printers is the improvements in the 802.11i networking standards. Unlike its predecessor WEP (Wired Equivalent Privacy), the new-and-improved 802.11i uses the Advanced Encryption Standard adopted by the U.S. government.
Posted in: Internet Topic| Tags: Device Basic Printer Wireless Printing home printing office network wireless bluetooth technology wifiReasons Why you Should Have an All in One Printers
Are you planning to buy a printer, why can�t you buy an all in one printer for your business? Do you know that you can buy an all in one printer at a cheaper price? This machine has a fax, a scanner, a printer and a photocopier. It is easy to have a machine that has them all in one and still make your ends meet your target.
Gone are the days when we had to scramble for bigger machine for our office and small business works like printing, scanning, faxing and photocopying. Today it is easy to buy yourself a machine that can perform all the above duties. In terms of costs, such machines are preferably cheap compared to buying the separate machines. I�m saying this because myself I�m engaged in this business and I have come to know the advantages and disadvantages of owning an all in one printer. But definitely the advantages out competes the disadvantages.
One of the logic about longevity of such machine is to know how to service them yourself. I have been servicing my printer for more than 4 years but up to today its performance is still above the best.
One of the best advantages of having an all in printer is that it economizes ink. You have to buy a toner that will be used for printing and photocopying. Unlike the other separate printers where you will be forced to buy ink for your printer and ink for the photocopying machine. In short an all in one printer remains cheaper compared to separate office machines.
Any advantage must come with disadvantage. One of the highest is that when one part of this a machine develops a defect, the whole machine tends to breakdown. For example, if the ink is used up, you will not print, neither photocopy.
Some printer technicians are not used to all in one printer, so in times of repair, they are at times spoiled and any spoil made to the scanner can as well affect the printer, the same to a fax. Therefore, care should be taken to choose the technician in time of machine failure.
In conclusion therefore, if time to buy a printer comes one should not hesitate to think of an all in one printer. This is because the advantages of such printers out competes the disadvantages. There are many outlets to purchase an all in one printer but the best place is the internet. Here you can get to know the best deals available and the guarantee given to a client. So next time you plan to buy a printer, don�t forget to think of an all in one printer because it saves time and money as far as business is concerned.
Posted in: Internet Topic| Tags: Device Business Printer time ink scanner machine printing today fax office