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A DSL router provides the basic interface required by a modem, as well as data routing capability. This routing capability gives the user the ability to manage multiple network users and devices, as well as provide security features including a software firewall, and the ability to control ports, MAC addresses, IP assignments (static or via DHCP), and more. When it comes to routers, DSL makes excellent use of them. Even in a residential installation, a properly configured router can add important security benefits to the user. DSL routers are a critical piece to overall DSL functionality. They are usually offered free of charge from the DSL service provider when you sign up for DSL service. You can also buy them at your local electronics stores or online stores. DSL. DSL (Digital Subscriber Line) is a technology that is commonly used in the US telecom environment. The most common is ADSL, where the "A" refers to asymmetrical speeds, meaning that the upload speeds capable and the respective download speeds capable are not equal. Typically, ADSL service can provide upload speeds of 384kb, and download speeds of 1.5mb. Most residential and small business subscribers using non-Cable-based services will use a form of DSL service. With any DSL service, however, there are limitations to whether service can be provisioned. With DSL, the distance limitation is 18,000 "cable feet", meaning, the copper pair serving the customer location cannot exceed this distance. While DSL has a theoretical speed limit of 8Mb, speeds this high could only be attained on a very short copper loop. Carriers today offer speeds greater than the typical DSL service, but charge more for more speed, and restrict deployment to the area much closer to their nearest fiber interconnect point or Central Office. In General. DSL service, in general, is a high-speed service (as compared to a dial-up service capping at 56kb) that is provisioned on the same copper pairs as POTS (Plain Old Telephone Service). POTS service is a low-frequency service, operating in the frequency spectrum between 300 and 3100Hz. ADSL service is provisioned in a higher frequency space on the same telephone line, using the 30Khz and 1.1Mhz. As a result of combining both POTS and ADSL on the same copper pairs, the ever-popular "DSL Filters" are required to block the high-speed service from damaging analog telephone equipment. In a typical DSL installation, only the DSL Modem itself is connected to the high-speed frequency band. Since higher frequencies attenuate at a higher rate per cable foot, the previously mentioned distance limitation is directly proportional to the carrier frequency used. |
Routers DSL
