17 GLOSSARY

 

TERM

DEFINITION

LCP

Link Control Protocol establishes, configures, and tests data link

 

connections used by PPP.

Latency

The time required for a signal to pass through a device. It is often

 

expressed in a quantity of symbols.

LED

light-emitting diode

LNS

An L2TP network server is a termination point for L2TP tunnels

 

where PPP frames are processed and passed to higher layer

 

protocols. LNS can operate on any platform that terminates PPP.

 

The LNS handles the server side of the L2TP protocol. L2TP

 

relies only on the single media over which L2TP tunnels arrive.

 

The LNS can have a single LAN or WAN interface, but can

 

terminate calls arriving at any of the LAC’s full range of PPP

 

interfaces (asynchronous, synchronous, ISDN, V.120, etc.).

 

The LNS initiates outgoing calls and receives incoming calls. LNS

 

is analogous to a home gateway in L2F technology.

loopback

A test that loops the transmit signal to the receive signal.

 

Usually, the loopback test is initiated on a network device. The

 

test is used to verify a path or to measure the quality of a signal

 

on that path.

M

 

TERM

DEFINITION

MAC address

The Media Access Control address is a unique, 48-bit value

 

permanently saved in ROM at the factory to identify each

 

Ethernet network device. It is expressed as a sequence of 12

 

hexadecimal digits printed on a Label on the Bottom of the

 

SVG2500. You need to provide the HFC MAC address to the

 

Internet Service provider. Also called an Ethernet address,

 

physical address, hardware address, or NIC address.

MB

One megabyte; equals 1,024 x 1,024 bytes, 1,024 kilobytes, or

 

about 8 million bits.

Mbps

Million bits per second (megabits per second). A rate of data

 

transfer.

media

The various physical environments through which signals pass;

 

for example, coaxial, unshielded twisted-pair (UTP), or fiber-optic

 

cable.

MIB

A management information base is a unique hierarchical

 

structure of software objects used by the SNMP manager and

 

agent to configure, monitor, or test a device.

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Motorola SVG2500 manual Term Definition LCP, Led, Lns, Mib