ZyXEL Communications Prestige 100L manual Dms Dns, Dram DSL, Dslam, Dte, Emi

	Prestige 100L IDSL Router
	which means that addresses are made available to assign to other systems.
Digital	The use of a binary code to represent information, such as 0/1, or on/off.
Digital	Digital code that authenticates whomever signed the document or software.
Signature	Software, messages, Email, and other electronic documents can be signed
	electronically so that they cannot be altered by anyone else. If someone alters a
	signed document, the signature is no longer valid. Digital signatures are created
	when someone generates a hash from a message, then encrypts and sends both the
	hash and the message to the intended recipient. The recipient decrypts the hash and
	original message, makes a new hash on the message itself, and compares the new
	hash with the old one. If the hashes are the same, the recipient knows that the
	message has not been changed. Also see Public-key encryption.

DMS

DNS

Domain Name

The name of digital central office switches from Northern Telecom. Model numbers start with BCS.

Domain Name System. A database of domain names and their IP addresses. DNS is the primary naming system for many distributed networks, including the Internet.

The unique name that identifies an Internet site. Domain Names always have 2 or more parts, separated by dots. The part on the left is the most specific, and the part on the right is the most general.

DRAM

DSL

Dynamic RAM that stores information in capacitors that must be refreshed periodically.

Digital Subscriber Line technologies enhances the data capacity of the existing twisted-pair wire that runs between the local telephone company switching offices and most homes and offices. There are actually seven types of DSL service, ranging in speeds from 16 Kbits/sec to 52 Mbits/sec. The services are either symmetrical (traffic flows at the same speed in both directions), or asymmetrical (the downstream capacity is higher than the upstream capacity). DSL connections are point-to-point dedicated circuits, meaning that they are always connected. There is no dial-up. There is also no switching, which means that the line is a direct connection into the carrier’s frame relay, ATM (Asynchronous Transfer Mode), or Internet-connect system.

DSLAM	A Digital Subscriber Line Access Multiplexer (DSLAM) is a network device, usually at
	a telephone company central office, that receives signals from multiple customer
	Digital Subscriber Line connections and puts the signals on a high-speed backbone
	line using multiplexing techniques. Depending on the product, DSLAM multiplexers
	connect DSL lines with some combination of asynchronous transfer mode ATM,
	frame relay, or IP networks.
DTE	Originally, the DTE (data terminal equipment) meant a dumb terminal or printer, but
	today it is a computer, or a bridge or router that interconnects local area networks.

EMI

Encryption

ElectroMagnetic Interference. The interference by electromagnetic signals that can cause reduced data integrity and increased error rates on transmission channels.

The act of substituting numbers and characters in a file so that the file is unreadable until it is decrypted. Encryption is usually done using a mathematical formula that determines how the file is decrypted.

Glossary C