Glossary
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Interphase Corporation
PMC (PCI Mezzanine Card)
A daughtercard form factor implemen-
tation of the PCI bus specification.
POTS (Plain Old Telephone Service)
Conventional voice grade
service and cabling infrastructure.
PPP (Point-to-Point Protocol)
A dial-up protocol that allows a
computer to use TCP/IP networking to connect remote access devices,
such as modems, to the Internet or other TCP/IP based networks.
PPP/MP (Point-to-Point Protocol/Multilink Protocol)
See
.
PRI (Primary Rate Interface)
A type of ISDN service that offers 23
B-channels at 64 Kbps and one D-channel at 64 Kbps (23B+D). In
Europe, PRI provides for 30 B-channels and two D-channels
(30B+1D).
Private Line
Synonym for a leased line. Dial voice line that does
not terminate at the voice private automatic branch exchange or that
does not appear on other sets in a key system.
Protocols
A set of rules that define how different computer systems
and other devices interoperate with each other.
PSTN
Public Switched Telephone Network.
PVC (Permanent Virtual Circuit)
A logical link whose endpoints
and class of service are defined by network management.
For Frame relay, analogous to an X.25 permanent virtual circuit, a
PVC consists of the originating frame relay network element address,
originating data link control identifier, terminating frame relay net-
work element address, and termination data link control identifier.
Originating refers to the access interface from which the PVC is initi-
ated. Terminating refers to the access interface at which the PVC stops.
Many data network customers require a PVC between two points.
QLLC (qualified logical link control)
An X.25 protocol that allows
the transfer of data link control information between two adjoining
SNA nodes that are connected through an X.25 packet-switching data
network. The QLLC provides the qualifier
Q
bit in X.25 data packets
to identify packets that carry logical link protocol information.
Q.921
This is the link layer protocol for ISDN.
Q.931
This is the network layer protocol for ISDN. Q.931 was
developed for out-of-band call control.
RAI (Remote Alarm Indication)
PRI alarm, also known as
Yellow
signal. This alarm indicates a carrier failure.
Содержание ENTIA 5536 DM PRI
Страница 34: ...Minimum System Requirements 14 Interphase Corporation...
Страница 46: ...Connecting to an MVIP Bus 26 Interphase Corporation...
Страница 56: ...Connecting to the Network 36 Interphase Corporation...
Страница 90: ...Removing the Drivers 70 Interphase Corporation...
Страница 136: ...Verifying COM Ports 116 Interphase Corporation...
Страница 172: ...Saving and Editing Frames 152 Interphase Corporation...
Страница 182: ...Understanding LoopTest Messages 162 Interphase Corporation...
Страница 190: ...Setting Port and Clock Modes 170 Interphase Corporation...
Страница 196: ...Interpreting Line Status Indicators 176 Interphase Corporation...
Страница 208: ...Procedures 188 Interphase Corporation...
Страница 220: ...Europe 200 Interphase Corporation...
Страница 238: ...Glossary 218 Interphase Corporation...