Paradyne 1862, Руководство пользователя

Страница: 75 / 78

1862 VoIP IAD User’s Guide
PSTN:
Public Switched Telephone Network. The standard telephone network.
PVC:
Permanent Virtual Circuit. Virtual circuit that is permanently established.
QoS:
Quality of Service. The expected data loss or latency.
remote access:
C
ommunication from a remote location or facility through a data link.
remote digital loopback test:
This test loops the remote digital receiver output back into the
transmitter input.
remote host:
The computer receiving the network commands.
RFC:
Request for Comments. Documents published by the Internet Engineering Task Force
pertaining to Internet protocols and policies.
RIP:
Routing Information Protocol. The protocol governing the exchange of routing information.
RJ11:
A 6-position jack used with dial networks and telephone sets.
RJ45:
An 8-position jack used with programmable dial networks.
router:
Protocol-dependent device that connects subnets together. Routers operate at the network
layer (layer 3) of the ISO Open Systems Interconnection--Reference Model.
routing table:
A table that lists routing paths to enable a node to route traffic to another node in the
network.
RS-232:
a low-speed, 25-position, DCE/DTE interface.
server:
Hardware or software that offers a specific service, such as database management, to a client.
SHDSL:
Symmetric High Bit Rate Digital Subscriber Loop. A DSL technology that allows
symmetrical transmissions over longer distances. Defined by the G991.2 ITU standard.
SLA:
Service Level Agreement. A contract between a service provider and a customer, which
guarantees a minimum level or quality of service to the customer.
SMTP:
Simple Mail Transport Protocol. A protocol used to transfer e-mail between or among
servers.
SNMP agent:
An application program that enables communication between a management system
and a device.
SNMP trap:
A message sent to a SNMP manager to communicate information about changes in
the network, such as a device being reset.
SNMP:
Simple Network Management Protocol. Protocol for open networking management.
static route:
A route that is permanent rather than a route that is dynamically assigned by another
router.
75