Digi WAN 3G User Manual page 207

Enhanced Data Rates for Global Evolution (EDGE)
A faster version of the Global System for Mobile (GSM) wireless service, designed to deliver
data at rates up to 384 Kbps and enable the delivery of multimedia and other broadband
applications to mobile phone and computer users. The EDGE standard is built on the existing
GSM standard, using the same time-division multiple access (TDMA) frame structure and
existing cell arrangements.
ESP Passthrough
A method of carrying IP packets for a Virtual Private Network (VPN) setup. In ESP
Passthrough, inbound IPsec ESP protocol traffic is forwarded from to a VPN device connected
to the Digi device's Ethernet port.
Evolution-Data Optimized (EV-DO, EVDO, or 1xEV-DO)
A wireless radio broadband data standard adopted by many CDMA mobile phone service
providers. It is standardized by 3GPP2, as part of the CDMA2000 family of standards.
Compared to 1xRTT (CDMA2000 1x) networks, or GPRS and EDGE networks, 1xEV-DO is
significantly faster.
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.
HyperText Transfer Protocol (HTTP)
An application protocol in the TCP/IP suite that defines the rules for transferring files (text,
graphic images, sound, video, and other multimedia files) on the World Wide web (WWW).
HyperText Transfer Protocol over Secure Socket Layer (HTTPS)
A secure message-oriented communications protocol designed for use in conjunction with
HTTP. HTTPS encrypts and decrypts user page requests as well as the pages that are returned
by the web server. HTTPS uses the Secure Socket Layer (SSL) as a sublayer.
Internet Control Message Protocol (ICMP)
A message control and error-reporting protocol between a host server and a gateway to the
Internet. ICMP uses Internet Protocol (IP) datagrams, but the messages are processed by the IP
software and are not directly apparent to the application user.
Internet Group Management Protocol (IGMP)
Internet Group Management Protocol (IGMP) provides a way for an Internet computer to report
its multicast group membership to adjacent routers. Multicasting allows one computer on the
Internet to send content to multiple other computers that have identified themselves as interested
in receiving the originating computer's content. Multicasting can be used for such applications
as updating the address books of mobile computer users in the field, sending out company
newsletters to a distribution list, and "broadcasting" high-bandwidth programs of streaming
media to an audience that has "tuned in" by setting up a multicast group membership.
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