Glossary
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EN/LZT1083982 R4
2000-12-07
not between switching stations. xDSL is similar to ISDN in as much as both operate over
existing copper telephone lines (POTS) and both require the short runs to a central
telephone office. However, xDSL offers much higher speeds.
DTAG
One of two ADSL modes that the HM220di ADSL modem can operate in. DTAG is a
proprietary ADSL mode used on ISDN lines mainly in Germany.
Encapsulation
A technology that enables one network to send its data via another network's
connections.
Ethernet
A Local Area Network (LAN) protocol which is one of the most widely implemented
LAN standards.
Gateway
A combination of hardware and software that links two different types of networks.
G.Dmt/ISDN
One of two ADSL modes that the HM220di ADSL modem can operate in.
Asymmetric Digital Subscriber Line full rate according to the ITU G992.1 Annex B
standard, which allows the ADSL line to support up to 8 Mbps downstream and 864 kbps
upstream. G.Dmt/ISDN ADSL is used to cooperate with a ISDN telephone line and
requires that a device called a ISDN splitter be installed at the subscriber or business
premises.
G.Dmt/POTS
One of four ADSL modes that the HM220dp ADSL modem can operate in.
Asymmetric Digital Subscriber Line full rate according to the ITU G992.1 Annex A
standard, which allows the ADSL line to support up to 8 Mbps downstream and 864 kbps
upstream. G.Dmt/POTS ADSL is used to cooperate with a POTS telephone line and
requires that a device called a POTS splitter be installed at the subscriber or business
premises.
G.Lite
One of fourADSL modes that the HM220dp ADSL modem can operate in.
Asymmetric Digital Subscriber Line, according to the ITU G992.2 Annex A standard. A
lower-speed version of ADSL that eliminates the need for the telco to install and
maintain a premises-based POTS splitter.
Hub
A common connection point for devices in a network. Hubs are commonly used to
connect segments of a LAN. A hub contains multiple ports.
Internet
A global network connecting millions of computers. There are a variety of ways to access
the Internet and one way can be to gain access through a commercial Internet Service
Provider (ISP).