Mobile Frequency Range Rx: 869-894; Tx 824-849 Multiple Access Method FDM Duplex Method FDD Number of Channels 832 Channel Spacing 30kHz Modulation FM AMPS AMPS (Advanced Mobile Phone Service) was the first cellular mobile system in the United States. AMPS operates as an analog system using 30 kHz wide channels. NAMPS AMPS was later enhanced …
Afd.sys (Windows Ancillary Function Driver) is a driver for Winsock, which is a program necessary to connect the computer to the Internet. It runs when the computer is booted and is responsible for all Internet connections on the computer, including wireless, LAN, browser, and third-party application connections. Afd.sys is a critical part of the Windows …
The major advantage of the Microsoft Windows operating system over the previous Disk Operating System (DOS) is that one can open and use multiple programs at the same time; hence the term “Windows” (as in having several windows – or programs or applications – open at one and the same time). This led to the …
Domain and forest functional levels provide a means of enabling additional domain and forest-wide Active Directory features, remove outdated backward compatibility in an environment, and improve Active Directory performance and security. In Windows 2000, the terminology for domain functional levels was domain modes. Forests in Windows 2000 have one mode and domains can have the …
While surfing the Internet, if an end-user encounters a 502 proxy error, he or she will not be able to view the desired web page. The error message is commonly encountered when accessing websites through a proxy server. The problem is typically caused for one of two reasons: 1 – The Internet Security and Acceleration …
Voltage is the measurement for the electrical force between two points that drives the current. More specifically, voltage is the measure of the energy per unit charge that is equal to the electrical potential difference between two measured points. Volts are normally measured by a voltmeter. Voltage drop is the reduction in voltage in an …
In order to deter theft, the majority of major automobile manufacturers implement a car radio security code. When the car stereo is removed from a vehicle, the device will not be usable until the unlock or security code is entered by the car owner or authorized repair facility. Unfortunately, some models of cars and trucks …
An email address is where electronic mail is sent from and received. An email address has a specific location on the Internet which can be found by other servers and networks fairly easy. There are a few components to an email address and they are standard throughout the internet. The first part of an email …
The telephone Network Interface Device (NID) is what connects your home telephone lines to the telephone company’s network. It is usually a small gray box located on the exterior of your home. It usually contains a modular phone plug that you can use for testing the line. They need both inside testing and outside testing. …
VB.NET Tutorials This tutorial sections assumes that you are already familiar with VB.NET. This tutorial is based on HTTPModule for Digest Authentication in VB.Net. The coolest thing about using an HttpModule for either DIGEST or BASIC Authentication against one’s own Data Store is that as long as the HttpModule is configured at all the destination …