in the downstream and 2.5 Mbit/s in the upstream.
Data transmission recommendation for ADSL2 with Annex A/B.
Data transmission rates: 12 Mbit/s (downstream), 1.0 Mbit/s
(upstream)
Data transmission recommendation for xDSL2+. There are three
variants: G.992.5 Annex A/B (ADSL2+) with data transmission rates
of 25 Mbit/s in the downstream and 1.0 Mbit/s in the upstream,
G.992.5 Annex L (RE-ADSL2+) with data transmission rates of 25
Mbit/s in the downstream and 1.0 Mbit/s in the upstream and
G.992.5 Annex M (ADSL2+) with data transmission rates of 25 Mbit/
s in the downstream and 3.5 Mbit/s in the upstream.
Data transmission recommendation for VDSL. Data transmission
rates: 52 Mbit/s (downstream), 16 Mbit/s (upstream)
Data transmission recommendation for VDSL2. Data transmission
rates: 200 Mbit/s (downstream), 200 Mbit/s (upstream)
See F.992.1.
See F.992.2.
See G.991.2.
The gateway is a network component for connecting different types
of network.
General Packet Radio Service (GPRS) is the name for the packet-
oriented service for transmitting data in GSM networks.
Generic Routing Encapsulation (GRE) is a network protocol for en-
capsulating other protocols so that they can be transported via the
Internet Protocol (IP) in the form of a tunnel (VPN). GRE uses pro-
tocol number 47.
The Global System for Mobile Communications (GSM), also known
as 2G, is a mobile communications standard. It achieves, along with
GPRS, a specified max. data transmission rate of 171.2 kbit/s.
With half-duplex, data can only be sent and received back-to-back
over a line.
With hands-free calling, calls can be made without lifting the receiv-
er. Other people in the room can participate in the conversation us-
ing a microphone and loudspeakers.
Glossary
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