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ACCULINK 317x E1 DSU/CSU
Glossary-6 December 1996 3170-A2-GB20-20
Lpbk branch Local Loopback branch of the E1 DSU/CSU menu tree.
LQR Link Quality Reports.
manager (SNMP) The device that queries agents for management information, or receives unsolicited
messages (traps) indicating the occurrence of specific events.
MB Megabytes. A unit of memory measurement equal to approximately one million
bytes (typically 1,048,576 bytes).
Mbps
Megabits per second (million bits per second).
menu tree
A display of E1 DSU/CSU functions that are accessed by selecting various
branches (Status, T
est, etc.).
MIB
Management Information Base. A database of managed objects used by SNMP to
provide network management information.
MIB II
MIB Release 2. The current Internet-standard MIB.
MRU
Maximum Request Unit.
mobile switching center A facility that provides overall control for a wireless communication system. Cell
sites are linked to the public telephone network through a mobile switching center.
network A configuration of data processing devices for information exchange.
NETWORK interface The network interface connectors on the rear panel of the E1 DSU/CSU.
NMS Network Management System. A computer system used for monitoring and
controlling network devices.
node A connection or switching point on the network.
object (SNMP) A specific item within a Management Information Base (MIB).
OOF Out Of Frame. An error condition in which frame synchronization bits are in error.
option A hardware or software function that can be selected or enabled as part of a
configuration process.
PAP Password Authentication Protocol.
parity A way of checking data accuracy by counting the number of bits that have a value
of one.
payload The information bits in a frame.
PBX Private Branch Exchange. T
elephone switching equipment dedicated to one
customer
. A PBX connects private telephones to each other and to the public
network.
PC Personal computer. In this document, references to a PC imply an IBM PC or an
IBM-compatible PC.
PDU Protocol Data Unit. Used when adding routes in the Internet.
PDV
Pulse Density V
iolation. The number of “ones” (marks, pulses) is not adequate for
the line requirement.
Perf branch Performance Report branch of the E1 DSU/CSU menu tree.
PLB Payload Loopback. Loops the received signal on the network interface back to the
network after it has passed through the framing circuity of the E1 DSU/CSU.
port An access point for data entry or exit.
PORT (1–4) interface The synchronous data port interface on the E1 DSU/CSU.
POWER connector The power input connector on the E1 DSU/CSU.