Short for asymmetric digital subscriber line, ADSL is a type of DSL broadband communications technology used for connecting to the Internet. ADSL allows more data to be sent over existing copper telephone lines (POTS), when compared to traditional modem lines. A special filter, called a microfilter, is installed on a subscriber’s telephone line to allow both ADSL and regular voice (telephone) services to be used at the same time. ADSL requires a special ADSL modem and subscribers must be in close geographical locations to the provider’s central office to receive ADSL service. Typically this distance is within a radius of 2 to 2.5 miles. ADSL supports data rates of from 1.5 to 9 Mbps when receiving data (known as the downstream rate) and from 16 to 640 Kbps when sending data (known as the upstream rate).
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ADSL+2 is an extension to ADSL broadband technology that provides subscribers with significantly faster download speeds when compared to traditional ADSL connections. ADSL+2 works in the same fashion as ADSL a special filter is installed on a subscriber’s telephone line to split existing copper telephone lines (POTS) between regular telephone (voice) and ADSL+2. ADSL2+ service […]
Short for Application Foundation Classes, a set of Microsoft foundation classes written entirely in Java. The AFC sits on top of the Java Development Kit (JDK) and extends Sun’s Abstract Window Toolkit (AWT). A similar group of foundation classes is Netscape’s Internet Foundation Classes (IFC).
Short for Automated Fingerprint Identification System, AFIS is a type of biometric system that uses digital imaging to capture a fingerprint, which then can then be compared to a database of fingerprint records to help determine the identity of an individual. AFIS is a biometrics system commonly used in law enforcement where sets of prints […]
(1) Short for AppleTalk Filing Protocol, the client/server file sharing protocol used in an AppleTalk network. A non-Apple network can only access data from an AppleShare file server by first translating into the AFP language. AFP over TCP/IP, a flavor of AFP, allows users to access AFP servers over TCP/IP networks. (2) Short for Advanced […]
- AF Servo
On a digital SLR camera, an AF (auto-focus) Servo refers to the capability of the camera to continuously focus on a moving subject. When using the camera, you would normally press the shutter button to a halfway point, allow the camera’s auto-focus to engage, then press the shutter button all the way down to capture […]