AT&T Telephone DS1/DMi/ISDN-PRI Manual do Utilizador descarregar pdf (Página 374)

GL-16

GLOSSARY

packet-switched

transport mode

packet

switching

packetized data

PAD

parameterized-

service format

partitioning

PAM

PC/PBX

Connection

PCM

PDM

PDS

preferred call

reference

premises

distribution

system (PDS)

PRI

The condition in which a communications system or network provides packet

switching of the user’s data. See also circuit-switched transport mode.

NOTE: Although the ISDN protocol defines the Packet Switched Transport

Mode and the Generic 2 administration software provides for this transport mode

— the switch hardware does not currently include a packet interface.

A data transmission technique whereby user information is segmented and routed

in discrete data envelopes called packets, each with its own appended control

information for routing, sequencing, and error checking. Packet switching allows

a channel to be occupied only during the transmission of a packet; on completion

of the transmission, the channel is made available for the transfer of other

packets. See also BX.25, packet, and X.25.

The digital multiplexed interface (DMI) mode-3 data-channel protocol used in

virtual-circuit service for the statistical multiplexing of data streams. See also

LAPD Packetized Data.

See packet assembler/disassembler.

One of two network-specific facility (NSF) service types that are administered in

conjunction with the Automatic Alternate Routing/Automatic Route Selection

(AAR/ARS) routing patterns. The parameterized service format requires

multiple bytes to convey all the necessary information about the requested service

or facility. See also binary service format.

The capability to impose restrictions on each tenant’s users to limit their access to

only a specified subset of the communications system’s facilities and services.

Partitioning allows a multitenant system to comply with state or federal

regulations and to provide security and cost allocation between tenants. See also

tenant service.

See pulse-amplitude modulation.

AT&T communications-management software for the MS-DOS

and UNIX

operating systems that integrates a digital multifunction telephone and a PC with

a communications system via a Digital Communications Protocol (DCP)

interface to provide enhanced voice and data communications services.

See pulse-code modulation.

See processor data module.

See premises distribution system.

See channel negotiation.

A cabling system that consolidates wiring for a customer’s on-site and remote

telephones and data terminals, and channels transmissions to the communications

system.

See primary rate interface.

1 2 ... 369 370 371 372 373 374 375 376 377 378 379 ... 395 396

Comentários a estes Manuais

Sem comentários

AT&T Telephone DS1/DMi/ISDN-PRI Manual do Utilizador Página 374

Comentários a estes Manuais