What is the basic feature of DSLAM?
What is the basic feature of DSLAM?
DSLAMs optimize high-speed transmission by terminating local subscriber loops and transferring traffic into a high capacity uplink. In other words, connecting a series of modems to a DSLAM allows a higher-quality link such as fiber to take over to connect customers to the Internet.
Which type of DSL requires the subscriber to be less than 4000 feet from the DSLAM?
VDSL boasts a much higher bandwidth capacity than ADSL or SDSL, with a common downstream limit of 52 Mbps and a limit of 12 Mbps for upstream traffic. VDSL’s distance limitation is 4,000 feet of telephone cable between a cable modem and a DSLAM.
What is DSL?
A technology for high-speed network or Internet access over voice lines. There are various types, including asymmetric DSL (ADSL), high-bit-rate DSL (HDSL), symmetric DSL (SDSL) and very-high-bit-rate DSL (VDSL). The whole group is sometimes referred to as “xDSL.”
What is DSLAM port?
DSLAM: a device for DSL service. The DSLAM port where the subscriber local loop is connected converts analog electrical signals to data traffic (upstream traffic for data upload) and data traffic to analog electrical signals (downstream for data download).
Why is DSLAM used?
A digital subscriber line access multiplexer (DSLAM) is a networking device that connects multiple DSL subscribers to one Internet backbone. DSLAM is used by Internet service providers (ISP) or telecommunication providers to share high-caliber Internet bandwidth between DSL subscribers through multiplexing techniques.
What is the maximum range of ADSL modem?
In general, the maximum range for DSL without a repeater is 5.5 km (18,000 feet). As distance decreases toward the telephone company office, the data rate increases. Another factor is the gauge of the copper wire.
What is DSLAM and how it works?
A digital subscriber line access multiplexer (DSLAM, often pronounced DEE-slam) is a network device, often located in telephone exchanges, that connects multiple customer digital subscriber line (DSL) interfaces to a high-speed digital communications channel using multiplexing techniques.
How fast is VDSL?
Some facts about VDSL: You can get up to 100Mbps download speeds and upload speeds up to 30Mbps. Areas with vectored VDSL can get speeds up to 130Mbps (vectored VDSL works by reducing signal interference, for efficiency and speed).
Can DSLAM act like a network switch?
The DSLAM acts like a network switch since its functionality is at Layer 2 of the OSI model. Therefore, it cannot re-route traffic between multiple IP networks, only between ISP devices and end-user connection points.
How many ports does a DSLAM aggregation card have?
Typically a single DSLAM aggregation card has 24 ports, but this number can vary with each manufacturer. The most common DSLAMs are housed in a telco -grade chassis, which are supplied with (nominal) 48 volts DC.
What are the components of DSLAM?
The most common DSLAMs are housed in a telco -grade chassis, which are supplied with (nominal) 48 volts DC. Hence a typical DSLAM setup may contain power converters, DSLAM chassis, aggregation cards, cabling, and upstream links.
What is the difference between DSLAM and NSP?
The aggregated traffic is then directed to a telco’s backbone switch, via an access network (AN), also called a Network Service Provider (NSP), at up to 10 Gbit/s data rates. The DSLAM acts like a network switch since its functionality is at Layer 2 of the OSI model.
