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Glossary
6
Glossary
ADSL
ADSL2
ADSL2+
FRITZ!Box Fon WLAN 7570 vDSL
abbreviation for Asymmetric Digital Subscriber Line
Designates a fast kind of file transfer that works with stan-
dard copper cables and transports signals in both direc-
tions at different speeds (upstream at 640 Kbit/s and
downstream at up to 9 Mbit/s).
abbreviation for Asymmetric Digital Subscriber Line 2
ADSL 2 (G.992.3) is a further development of the ADSL norm
(G.992.1/G.992.2).
ADSL2 offers range much greater than did the first ADSL
generation, and is significantly more robust than ADSL, as
it can simply switch off interference from single carrier fre-
quencies. This feature allows ADSL2 to prevent synchroni-
zation losses.
With a throughput rate of up to 12 Mbit/s downstream,
ADSL2 offers considerably greater bandwidth than ADSL.
ADSL2 is completely downward compatible, meaning that
terminal equipment compliant with ADSL can also be oper-
ated on ADSL2 lines, although the devices cannot exploit
the advantages of ADSL2.
abbreviation for extended bandwidth Asymmetric Digital
Subscriber Line 2
ADSL2+ (G.992.5) is a further development of the ADSL
norm (G.992.1/ G.992.2).
ADSL2+ offers a doubled frequency range used for down-
stream transmission, and thus double the maximum band-
width achievable for downstream to 24 Mbit/s.
ADSL2+ is completely downward compatible, meaning that
terminal equipment compliant with ADSL and ADSL2 can al-
so be operated on ADSL2+ lines, although the devices can-
not exploit the advantages of ADSL2+.
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