How fast is HDSL?

1.544 Mbps

Type Download Speed Upload Speed
ADSL 1.5–9 Mbps 16–640 Kbps
SDSL 1.544 Mbps 1.544 Mbps
HDSL 1.544 Mbps 1.544 Mbps
VDSL 20–50 + Mbps Up to 20 Mbps

What is HDSL used for?

High bit-rate Digital Subscriber Line (HDSL) technology permits two-way 1.544 or 2.048 Mb/s transport over most existing copper telephone cables without repeaters, cable conditioning, or binder group segregation. Approximately 1000 HDSLs are now in service, and the rate of deployment is accelerating.

What is difference between DSL and HDSL?

High bit-rate DSL (HDSL) – Providing transfer rates comparable to a T1 line (about 1.5 Mbps), HDSL receives and sends data at the same speed, but it requires two lines that are separate from your normal phone line. Symmetric DSL (SDSL) – Like HDSL, this version receives and sends data at the same speed.

What is the bit rate of SDSL?

SDSL is a multi-rate technology, offering speeds ranging from 192 kbit/s to 2.3 Mbit/s, using a single pair of copper.

What does ADSL and VDSL mean?

ADSL (Asymmetric Digital Subscriber Line) uses copper telephone wires for transmitting digital information such as data, audio and video, at a high bandwidth. VDSL (Very high bit rate digital subscriber line) is a newer technology. Like ADSL, VDSL uses your copper phone line, but delivers a faster connection speed.

Is VDSL asymmetric?

VDSL2 permits the transmission of asymmetric and symmetric aggregate data rates up to 300+ Mbit/s downstream and upstream on twisted pairs using a bandwidth up to 35 MHz.

How far can you run ADSL line?

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.

Is VDSL better than fibre?

Fibre is the best and only viable Internet solution for today and for the future. Making matters worse, VDSL suffers from attenuation (degrading with distance) and Cable shares capacity across multiple homes, whereby the speeds versus point to point fibre (FTTH) are significantly reduced.

What is high bit rate digital subscriber line ( HDSL )?

High-bit-rate Digital Subscriber Line (HDSL) technology is a transparent replacement for a T-1 repeatered line. It allows DS-1 signals to be transported over distances of up to 12,000 feet (3700 meters) on unconditioned copper cable, which are cables without line repeaters.

What’s the difference between HDSL and ADSL line rate?

Unlike ADSL, HDSL operates in the baseband and does not allow POTS and ISDN to coexist on the wire same pairs. Unlike ADSL, the proprietary SDSL, and G.SHDSL, HDSL is not rate adaptive: the line rate is always 1.544 Mbit/s or 2.048 Mbit/s.

What can a HDSL line be used for?

HDSL is typically used for connecting bridges, routers, and telephone equipment such as Private Branch Exchanges (PBXs) over a campus using HDSL line drivers with built-in CSU/DSU (Channel Service Unit/Data Service Unit) functionality. It can also be used for private data networks, connections between points of presence (POPs), and other services.

What’s the maximum distance for a HDSL line?

HDSL can carry both voice and data over a single communication link. The maximum distance for HDSL transmission is generally 3700 meters when running over unconditioned copper twisted-pair wiring; some vendors claim that their devices support twice this distance.