Digi X2 - Manual (Page 229)

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factory defaults
The default configuration values that are set in a device at the factory.
File Transfer Protocol (FTP)
A standard Internet protocol that specifies the simplest way to exchange files between
computers on the Internet.
FTP
See File Transfer Protocol.
General Packet Radio Service (GPRS)
A packet-based wireless communication service based on Global System for Mobile
(GSM) communication that transports data rates from 56 up to 114 Kbps and
continuous connection to the Internet for mobile phone and computer users. Higher data
rates allow users more flexibility in the media they transmit.
Generic Routing Encapsulation (GRE)
A routing protocol used to route (tunnel) various types of information between
networks. See also GRE Passthrough.
GRE Passthrough
A method of carrying IP packets for a Virtual Private Network (VPN) setup. In GRE
Passthrough, inbound IPsec GRE protocol traffic is forwarded from to a VPN device
connected to the Digi device’s Ethernet port.
Global System for Mobile communication (GSM)
A digital mobile telephone system that digitizes and compresses data, then sends it
down a channel with two other streams of user data, each in its own time slot. It operates
at either the 900 MHz or 1800 MHz frequency band.
GSM
See Global System for Mobile communication.
High Speed Downlink Packet Access (HSDPA)
High Speed Downlink Packet Access. a packet-based data service with data
transmission up to 8-10 Mbit/s (and 20 Mbit/s for MIMO systems) over a 5MHz
bandwidth in W-CDMA downlink. HSDPA implementations includes Adaptive
Modulation and Coding (AMC), Multiple-Input Multiple-Output (MIMO), Hybrid
Automatic Request (HARQ), fast scheduling, fast cell search, and advanced receiver
design.