SDSL works by sending digital pulses in the high-frequency area of telephone wires and cannot operate simultaneously with voice connections over the same wires. Short for symmetric digital subscriber line, SDSL is a technology that allows more data to be sent over existing copper telephone lines (POTS). ADSL2+ service is most commonly offered in highly-populated metropolitan areas and subscribers must be in close geographical locations to the provider’s central office to receive ADSL2+ service. 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. ADSL+2 – ADSL ExtensionĪn extension to ADSL broadband technology that provides subscribers with significantly faster download speeds when compared to traditional ADSL connections. Short for asymmetric digital subscriber line 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). ADSL – Asymmetric Digital Subscriber LineĪDSL is the most commonly deployed types of DSL in North America. xDSL connection speeds range from 128 Kbps to 9 Mbps. ![]() All types of DSL technologies are collectively referred to as xDSL. The two main categories of DSL for home subscribers are called ADSL and SDSL. DSL Digital Subscriber LineĭSL is frequently referred to as an “always on” connection because it uses existing 2-wire copper telephone line connected to the premise so service is delivered simultaneously with wired telephone service - it will not tie up your phone line as an analog dial-up connection does. Broadband ISDN has not been widely implemented. SONET is the physical transport backbone of B-ISDN. B-ISDN – Broadband ISDNīroadband ISDN is similar in function to ISDN but it transfers data over fiber optic telephone lines, not normal telephone wires. Typical ISDN speeds range from 64 Kbps to 128 Kbps. Integrated services digital network ( ISDN) is an international communications standard for sending voice, video, and data over digital telephone lines or normal telephone wires. ISDN – Integrated Services Digital Network Today, analog has been widely replaced by broadband (Cable and DSL). Typical Dial-up connection speeds range from 2400 bps to 56 Kbps. Because dial-up access uses normal telephone lines the quality of the connection is not always good and data rates are limited. The modem converts received analog data to digital and vice versa. Dial-up is an analog connection because data is sent over an analog, public-switched telephone network. Using a modem connected to your PC, users connect to the Internet when the computer dials a phone number (which is provided by your ISP) and connects to the network. Analog: Dial-up Internet AccessĪlso called dial-up access, an analog Internet connection is both economical and slow. This is no doubt will change over time and Internet connection speeds also vary between Internet Service Providers (ISP). The connection speeds listed below represent a snapshot of general average to maximum speeds at the time of publication. The need for speed has changed the options available to consumers and businesses alike in terms of how and how fast we can connect to the Internet. Today, Flash, animations, online gaming, streaming video, database-driven websites, ecommerce and mobile applications (to name but a few) are standards. Ten years ago being able to center, bold, and produce text in different colors on a webpage was something to admire. ![]() ![]() Over the years the way content is presented via the Web has also changed drastically. We reviews connection speeds ranging from dial-up to T3 and everything in between.Īs technology grows, so does our need for bigger, better and faster Internet connections. Technology changes at a rapid pace and so do Internet connection speeds.
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