Carrier Access Access Navigator user manual Multiplex

Glossary

Line Loopback

Line Overhead

Line Terminat- ing Equipment

Local Area

Network

Loopback

Management

Information

Base

A connection that loops back the entire signal along with the original framing.

The traffic management portion of a communications system that is transported in the overhead bits of communications links such as DS1, DS3, and SONET.

LTE. Network elements such as add/drop multiplexers or digital crossconnect systems which can access, generate, and process Line Overhead.

LAN. Usually refers to a network connecting users in physical proximity, such a one floor or one building.

A temporary test connection in a communications network that loops the transmit signal line back towards the receive signal line in order to verify the signal path.

MIB. A database used by Simple Network Management Protocol (SNMP) systems to check network statistics and configurations.

Multiplex	MUX. To transmit two or more signals over a single channel.
Multiplexer	MUX. A device for combining several channels to be carried by one line or fiber.
Narrowband	Services requiring up to 1.5 Mbps transport capacity.
Network	NE. Any device that is part of a communications network and can terminate
Element	section, line, or path overhead functions.
Orderwire	A channel used by installers to expedite the provisioning of lines.
Overhead	Extra bits in a digital stream used to carry information besides traffic signals.
	Orderwire, for example, would be considered overhead information.
P-Phone	Proprietary Phone, also called an Electronic Business Set (EBS), is an analog
	Centrex service offered by Nortel and supported by Nortel DMS switches and
	P-Phone compatible telephone stations. The analog signal between the P-Phone
	and Central Office is a single-pair subscriber loop providing normal full-duplex
	analog voice and an 8-kHz half-duplex amplitude-shift-keyed signal that carries
	signaling information. Nortel NIS V202-1 specifies the GR-303 requirements for
	a remote digital terminal (RDT) interface with the Nortel DMS switch.
Parity	An error-checking scheme which examines the number of transmitted bits in a
	block which hold the value one. For even parity, an overhead parity bit is set to
	either one or zero to make the total number of transmitted ONES an even number.
	For odd parity, the parity bit is set to make the total number of ONES transmitted
	an odd number.
Path	A logical connection between two points in a network, which may follow many
	physical paths.

GlossaryGlossaryGlossaryGlossary-10 August 2003 Access Navigator - Release 1.8