What is the Difference Between ADSL2 and ADSL2+ (ADSL2 Plus)?

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The main difference between ADSL2 and ADSL2+ (ADSL2 Plus) is the bandwidth they use along the existing copper wires. ADSL2+ uses twice as much bandwidth as ADSL2, which results in faster download speeds. Here are some key points to consider:

  • Bandwidth: ADSL2 utilizes frequencies between 0.14 MHz and 1.1 MHz, while ADSL2+ offers double the frequency range, between 0.14 MHz and 2.2 MHz.
  • Speed: ADSL2 can offer maximum speeds of up to 12 Mbps, whereas ADSL2+ can reach up to 24 Mbps.
  • Compared to ADSL: ADSL2+ is an extension of ADSL broadband technology, providing faster download speeds. ADSL2, on the other hand, uses the same bandwidth as ADSL.
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Comparative Table: ADSL2 vs ADSL2+ (ADSL2 Plus)

ADSL2 and ADSL2+ (ADSL2 Plus) are improved versions of the original ADSL (Asymmetric Digital Subscriber Line) technology, which provides high-speed internet access over traditional telephone lines. The main differences between ADSL2 and ADSL2+ are as follows:

Feature ADSL2 ADSL2+
Downstream 12-14 Mbps (megabits per second) Up to 24-25 Mbps (megabits per second)
Upstream 1-1.5 Mbps (megabits per second) 1-1.5 Mbps (megabits per second)
Standby Mode Improved efficiency over ADSL Core mode for enhanced sleep mode
Security Support for VPN connections Support for VPN connections and interoperability

ADSL2+ doubles the possible downstream data bandwidth compared to ADSL2, enabling higher connection speeds over shorter distances. Both technologies are considered parts of the xDSL family, connecting service provider networks and customer sites over the "last mile" of the network. They feature asymmetric data transmission, with downstream bandwidth typically greater than upstream bandwidth.