Glossary - DSC T-LINK TL250 Installation Manual

Glossary

Console
A PC application program which can connect to the receiver and provide Diagnostic and pro-
gramming abilities to the user.
DHCP
Dynamic Host Configuration Protocol, a protocol for assigning dynamic IP addresses. With
dynamic addressing, a device can have a different IP address every time it connects to the net-
work. In some systems, the device's IP address can even change while it is still connected.
DHCP also supports a mix of static and dynamic IP addresses.
Dynamic addressing simplifies network administration because the server keeps track of IP
addresses rather than requiring an administrator to manage the task. This means that a new
computer can be added to a network without the hassle of manually assigning it a unique IP
address.
DVACS®
Digital Voice Access Control System This monitoring method requires a dedicated leased line
from Bell Canada connected between the alarm system and the monitoring station. It is
supervised so that if the line is cut an alarm will occur. This system is only available in Can-
ada and meets ULC certification requirements. DVACS is a registered trademark of Electro
Arts Ltd. Scarborough Ontario Canada
Encryption
The translation of data into a secret code usually based on a key. Encryption is the most effec-
tive way to achieve data security. To read an encrypted file, you must have access to a secret
key or password that enables you to decrypt.
Ethernet
A local-area network (LAN) protocol developed by Xerox Corporation in cooperation with DEC
and Intel in 1976. Ethernet uses a bus or star topology and supports data transfer rates of 10 Mbps.
A newer version of Ethernet, called 100BaseT (or Fast Ethernet), supports data transfer rates of
100 Mbps. The newest version, Gigabit Ethernet, supports data rates of 1 Gigabit (1,000 Mega-
bits) per second.
IEEE
Abbreviation of Institute of Electrical and Electronics Engineers, pronounced I-triple-E.
Founded in 1963, the IEEE is an organization composed of engineers, scientists, and students.
The IEEE is best known for developing standards for the computer and electronics industry.
Intranet
A network based on TCP/IP protocols belonging to an organization, usually a corporation,
accessible only by the organization's members, employees, or others with authorization.
IP
Abbreviation of Internet Protocol, pronounced as two separate letters. IP specifies the format
of packets, and the addressing scheme. Most networks combine IP with a higher-level protocol
called Transport Control Protocol (TCP), which establishes a virtual connection between a des-
tination and a source.IP by itself is something like the postal system. It allows you to address a
package and drop it in the system, but there's no direct link between you and the recipient.
TCP/IP, on the other hand, establishes a connection between two devices so that they can send
messages back and forth for a period of time.
IP Address
An identifier for a computer or device on a TCP/IP network. Networks using the TCP/IP proto-
col route messages based on the IP address of the destination. The format of an IP address is a
32-bit numeric address written as four numbers separated by periods. Each number can be zero
to 255.
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