Glossary
GL-3
7800-A2-GB28-80
May 1999
Network Management System. A computer system used for monitoring and controlling
network devices.
Network-to-Network Interface. The point of connection of two frame relay networks.
A connection or switching point on the network.
Out of Frame. An error condition in which frame synchronization bits are in error.
Out of Service. A digital network trouble signal reported by the remote unit.
Protocol Data Unit. A message containing protocol-specific information.
The continuous process by which NMS solicits network information.
Point-to-Point Protocol. A protocol for packet transmission over serial links, specified by
Internet RFC 1661.
Permanent Virtual Circuit. A connection established administratively and used to support
ATM, frame relay, and X.25.
Rate Adaptive Digital Subscriber Line. A technique for the use of an existing twisted-pair
line that permits simultaneous POTS and high-speed data communication at adaptive
symmetric and asymmetric rates.
A device that connects LANs by dynamically routing data according to destination and
available routes.
A table used by a node to route traffic to another node in the multiplexer network.
Severely Errored Seconds. Usually defined as a second during which a specific number of
CRC errors was exceeded, or an OOF or other critical error occurred.
A command providing write access to SNMP MIB objects.
Service Level Verifier. A feature that monitors and ensures frame relay network service.
Simple Network Management Protocol. Protocol for open networking management.
A display of connection of devices. A submap may be developed by the HP OpenView
using the autodiscovery feature, or it may be created by the user.
A portion of a network, which may be a physically independent network segment, that
shares a network address with other portions of the network and is distinguished by a
subnet number. A subnet is to a network what a network is to an internet.
A number that identifies the subnet portion of a network address. The subnet mask is a
32-bit Internet address written in dotted-decimal notation with all 1s in the network and
subnet portions of the address.
A term for a digital carrier facility used to transmit a DS1 formatted digital signal at
1.544 Mbps. It is used primarily in North America.
Transmission Control Protocol/Internet Protocol. The dominant protocol suite in the
worldwide Internet, TCP allows a process on one machine to send data to a process on
another machine using the IP. TCP can be used as a full-duplex or one-way simplex
connection.
Virtual terminal protocol in the Internet suite of protocols. Allows the user of one host
computer to log into a remote host computer and interact as a normal terminal user.
Trivial File Transfer Protocol. A standard TCP/IP protocol that allows simple file transfer to
and from a remote system without directory or file listing. TFTP is user where FTP is not
available.
NMS
NNI
node
OOF
OOS
PDU
polling
PPP
PVC
RADSL
router
routing table
SES
Set (SNMP)
SLV
SNMP
submap
subnet
subnet mask
T1
TCP/IP
Telnet
TFTP
