ZyXEL Communications Prestige 100L manual Glossary, Ansa, Arp, Bri

	Prestige 100L IDSL Router
	Glossary
2B+D	The Basic Rate Interface (BRI) in ISDN. A single ISDN circuit is divided into two
	64kbps digital channels for voice or data and one 16kbps channel for low speed data
	and signaling. In ISDN, 2B+D is carried on one or two pairs of wires (depending on
	the interface), the same wire pairs that today bring a single voice circuit into your
	home or office.
10BaseT	The 10-Mbps baseband Ethernet specification that uses two pairs of twisted-pair
	cabling (Category 3 or 5): one pair for transmitting data and the other for receiving
	data.
Analog	An electrical circuit that is represented by means of continuous, variable physical
	quantities (such as voltages and frequencies), as opposed to discrete
	representations (like the 0/1, off/on representation of digital circuits).
ANSA	(Alternate Network Service Agreement): Under ANSA, customers who reside in areas
	where the central office switch does not support ISDN can be serviced from a
	neighboring central office at no additional charge. From the customer's perspective,
	ISDN is readily available and affordable, but the customer MUST agree to migrate to
	the local central office if and when service becomes available. In most cases this
	involves a change in phone number. This agreement pertains to Bell South
	customers only.
Architecture	A design. The term architecture can refer to either hardware or software, or to a
	combination of hardware and software. The architecture of a system always defines
	its broad outlines, and may define precise mechanisms as well.

ARP

AT&T 5ESS Authenticity

Address Resolution Protocol is a protocol for mapping an Internet Protocol address (IP address) to a physical machine address that is recognized in the local network.

A digital central office switching system made by AT&T.

Proof that the information came from the person or location that reportedly sent it. One example of authenticating software is through digital signatures.

Backbone	A high-speed line or series of connections that forms a major pathway within a
	network.

Bandwidth B Channel

Bit

BRI

This is the capacity on a link usually measured in bits-per-second (bps).

This is an ISDN communication channel that bears or carries voice, circuit or packet conversations. The B-channel is the fundamental component of ISDN interfaces. It carries 64,000 bits per seconds in either direction.

(Binary Digit) – A single digit number in base-2, in other words, either a one or a zero. The smallest unit of computerized data.

(Basic Rate Interface): The most common kind of ISDN interface available in the US. BRI contains two B channels, each with 64 kbps capacity, and a single D channel (16 kbps) which is used for signaling and call progress messages.

Byte A set of bits that represent a single character. There are 8 bits in a Byte.

Glossary A