HDSL modems can be obtained from DSL providers, with variations in upload/download speeds and types of lines used. Consider cable length, reliability, longevity, software interface, costs, and customer support. Wireless modems are becoming popular. G.SHDSL is a common standard. Consider maximum cable lengths when connecting multiple modems. Look for diagnostic software and tuning capabilities. Understand charges and customer service.
You will most likely get your high bit rate Digital Subscriber Line (HDSL) modem from your Digital Subscriber Line (DSL) provider, the company through which you receive access to the Internet. Instead of HDSL, your provider may call it HDSL-2, a symmetrical high bit rate digital subscriber line (SDHSL) or a global standard high bit rate digital subscriber line (G.SHDSL). These variations may differ in upload and download speeds or the types or number of lines used. To choose the best HDSL modem, you will need to consider the length of cable you need, if any; the reliability of the modem; its longevity; and the software interface that comes with it. You might also consider the initial or monthly costs and the level of customer support offered.
There has been a trend towards wireless modems, which allow more than one computer to connect to the modem, and therefore to the Internet more easily than running physical cables throughout the house in support of a wired local area network (LAN) . Also, you don’t need a LAN switch with a wireless ADSL modem. If a computer does not support wireless connections, you may need to install a transmitter/receiver device. This can be done easily using a USB device.
An HDSL modem is typically used in corporate environments and especially for carrying out cellular phone service. Most providers have adopted the G.SHDSL standard to provide higher data rates and more flexibility, as asymmetrical speeds can also be set. Asymmetrical speeds only have crosstalk at one end of the line, which reduces data error rates and therefore increases throughput for the same bandwidth.
Maximum cable lengths must be carefully considered. If you are connecting two buildings, each with an HDSL modem, you need to consider the entire length of the cable, not just the distance between the buildings. Running a cable several floors and then several floors will add significant length to the overall cable.
In addition to the reliability and longevity of the HDSL modem, the software interface should be looked into. Diagnostic software should be part of the modem, along with tuning capabilities. Make sure you understand any initial or monthly charges for the HDSL modem and what level of customer service is provided. This knowledge can help you choose the best HDSL modem.
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