Crypto Investment Arena

ISDN is a service that operates at 128 Kbps and is available from your phone company. Charges for ISDN connections usually resemble those for analog lines—you pay per call and/or per minute, usually depending on distance. ISDN charges also can be flat rate if linked to a local Centrex system. Technically, ISDN consists of two 64-Kbps channels that work separately. Load-balancing or “bonding” of the two channels into a 128-K single channel is possible when you have compatible hardware on each end of a connection (for instance, between two of your campuses). What’s more, as a digital service, ISDN is not subject to the “line noise” that slows most analog connections, and thus offers actual throughput much closer to its promised maximum rate. You can make ISDN connections either with an ISDNready router or with an ISDN terminal adapter (also called an ISDN modem) connected to the serial port of your router. Again, modems are best for single users, because each device needs its own

The difference between analog and digital signals is very important for data communications. The most familiar “analog” communication is a phone call. Varying electrical voltage reflects the variations in the volume and tone of the human voice. By contrast, digital communications use a series of 1s and 0s to carry information from point to point. Modems actually convert the digital data of one computer into an analog signal for transmission over the phone lines. On the receiving end, another modem converts the analog signal back into a series of 1s and 0s, so the receiving computer can interpret the transmission. Today, phone companies can offer fully digital service between LANs (leased lines such as 56 K, 384 K, and T1s are digital services), or Integrated Services Digital Network (ISDN) which allows dialup connections on an as-needed basis. When it comes to moving data, digital communications are less susceptible to errors and faster than analog signals because they are not sus

Modems are used for “dialup” communications; in other words, they dial up a network connection when needed, and when the transmission is completed, the connection is disabled. They work with ordinary telephone lines. When you want to send data across telephone lines, the modem takes the information from digital format and converts it (or modulates it) into an analog signal. The receiving modem converts the analog signal back into digital form (or demodulates it) to be read by your computer. This modulating and demodulating gives the modem its name.

Sometimes you will have an older version of Windows and you try to install and run newer software , this could cause your system to crash . Try to keep updated with your computers operating system software as well as your applications . To stay updated with Windows go to the start menu, settings, and windows update . This will connect you with Microsoft’s web site and update your files automatically.

• Try to power on with the AC adapter connected. • Disconnect the AC adapter and try to power on with the battery. • Charge the battery • Try a different battery and/or AC adapter • If your laptop still will not power on: 1. Remove the power cord and battery. 2. Push and hold the power button for at least 15 seconds. 3. Plug the power cord in and turn your computer on. Note: leave the battery out. 4. If successful, shut the computer down, install the battery and reboot. 5. If not successful, try these steps using the battery and not the power cord in step 3, or try it using both the power cord as well as the battery.

1. If you get a message saying the domain name server (DNS) can't find your page and you're sure you've typed it in correctly or clicked on a valid link, try it again - TWO more times! (Sometimes packets don't get there!) 2. If you get a "Not found" message, the page may be temporarily missing because of miscoding at the target site. Try it again tomorrow...or try the home page for the site and send e-mail asking them to restore the page. 3. Be aware that sometimes a page you've visited recently may be coming from your cache (or the cache on a proxy server within your library). To get the "fresh" version of the page, click on "Reload" in your tool bar . Also try clearing your cache.

While in the Internet Explorer program… 1.Click on Tools on the File Menu Bar 2.Click on Internet Options 3.On the General Tab, Click on the delete Files button in the Temporary Internet Files section. 4.Click the box for Delete all offline content. 5.Click OK

An IP address is a 32-bit number that identifies each sender or receiver of information that is sent in packets across the Internet. When you request an HTML page or send e-mail, the Internet Protocol part of TCP/IP includes your IP address in the message (actually, in each of the packets if more than one is required) and sends it to the IP address that is obtained by looking up the domain name in the Uniform Resource Locator (URL) you requested or in the e-mail address you're sending a note to. At the other end, the recipient can see the IP address of the Web page requestor or the e-mail sender and can respond by sending another message using the IP address it received. An IP address has two parts: the identifier of a particular network on the Internet and an identifier of the particular device (which can be a server or a workstation) within that network. On the Internet itself - that is, between the router that move packets from one point to another along the route - only the

A FRAD (frame relay access device; also sometimes referred to as a frame relay assembler/dissembler) is a box that encapsulates (puts frame relay header and trailer information on) outgoing data packets and decapsulates (removes frame relay headers and trailers from) incoming packets. The FRAD is a box, usually close to the user, that provides the interface between the user and a network that uses frame relay. MSLN had both 56K FRADS and 56K and T1 Routers in libraries.

1. Hardware conflict: The number one reason why Windows crashes is hardware conflict. Each hardware device communicates to other devices through an interrupt request channel (IRQ). These are supposed to be unique for each device. If there are a lot of devices, or if they are not installed properly, two of them may end up sharing the same IRQ number. When the user tries to use both devices at the same time, a crash may happen. 2. Bad Ram: Ram ( random-access memory ) problems might bring on the blue screen of death with a message saying Fatal Exception Error. A fatal error indicates a serious hardware problem. Sometimes it may mean a part is damaged and need to be replaced. Also a fatal error caused by Ram might be caused by a mismatch of chips. 3. Mistaken BIOS settings: Every motherboard is supplied with a range of chipset settings that are decided in the factory. A common BIOS error concerns the CAS latency which refers to the Ram. Older EDO (extended data out) Ram has

In general, a hub is the central part of a wheel where the spokes come together. The term is familiar to frequent fliers who travel through airport "hubs" to make connecting flights from one point to another. In data communications , a hub is a place of convergence where data arrives from one or more directions and is forwarded out in one or more other directions. A hub usually includes a switch of some kind. (And a product that is called a " switch " is really a “smart hub”). The distinction seems to be that the hub is the place where data comes together and the switch is what determines how and where data is forwarded from the place where data comes together.