Glossary - Digi TS 8 MEI User Manual

Glossary

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802.11
The IEEE standard for wireless Local Area Networks. It uses three different physical layers,
802.11a, 802.11b and 802.11g.
access control list
See IP filtering.
Address Resolution Protocol (ARP)
A protocol for mapping an Internet Protocol address () to a physical machine address that is
recognized in the local network.
Advanced Digi Discovery Protocol (ADDP)
A protocol that runs on any operating system capable of sending multicast IP packets on a
network. ADDP allows the system to identify all ADDP-enabled Digi devices attached to a
network by sending out a multicast packet. The Digi devices respond to the multicast packet and
identify themselves to the client sending the multicast.
alarms
Used to send emails or issue SNMP traps when certain device events occur.These events include
changes in GPIO signals, certain data patterns being detected in the data stream, and, for cellular-
enabled Digi devices, cellular alarms for signal strength and amount of cellular traffic for a given
period of time.
autoconnection
A network connection initiated from a Digi device that is based on timing, serial activity, or
serial modem signals.
Auto-IP
A standard protocol that automatically assigns an IP address from a reserved pool of standard
Auto-IP addresses to the computer on which it is installed. The device is set to obtain its IP
address automatically from a Dynamic Host Configuration Protocol (DHCP) server. But if the
DHCP server is unavailable or nonexistent, Auto-IP will assign the device an IP address. If
DHCP is enabled or responds later or you use ADDP, both will override the Auto-IP address
previously assigned.
CDMA
CDMA (Code-Division Multiple Access) protocols are used in wireless communications.
CDMA is a form of multiplexing, which allows numerous signals to occupy a single
transmission channel, optimizing the use of available bandwidth. The technology is used in
ultra-high-frequency (UHF) cellular telephone systems in the 800-MHz and 1.9-GHZ bands and
through an analog-to digital conversion enhances privacy and makes cloning difficult.
CLI
Command-line interface.
COM port redirection
The process of establishing a connection between the host and networked serial devices by
creating a local COM or TTY port on the host. See also RealPort.
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