Digi X2 - Manual (Page 228)

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Encapsulating Security Payload (ESP)
A routing protocol used to route (tunnel) various types of information between
networks. See also ESP Passthrough.
encryption
The conversion of data into a form, called a ciphertext, that cannot be easily understood
by unauthorized people. Decryption is the process of converting encrypted data back
into its original form, so it can be understood. Encryption/decryption is especially
important in wireless communications. This is because wireless circuits are easier to tap
than their hard-wired counterparts.
end device
In Mesh/ZigBee networks, end devices are network devices that have no routing
capacity. They must always interact with their parent node (router or coordinator) to
transmit or receive data. An end device can be a source or destination for data packets
but cannot route packets. End devices can be battery-powered and offer low-power
operation. Characteristics of end devices include:
– Several end devices can operate in one PAN
– Can be a data packet source and destination
– All messages are relayed through a coordinator or router
– Low power end devices are not supported in this release.
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.