Comtech EF Data Vipersat 564L Betriebsanweisung Seite 146

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E-6 Vipersat CDD-56X Series User Guide
N
NAT Network Address Translation – An Internet standard that enables a local-area
network (LAN) to use one set of IP addresses for internal (private) traffic and a
second set of addresses for external (public) traffic.
NOC Network Operation Center – Has access to any earth station installed using the
VIPERSAT Network Control System (VNCS). An NOC can remotely interro-
gate, control, and log network activities.
O
ODU Outdoor Unit – In a VSAT system the RF components (transceiver) are usually
installed outdoors on the antenna structure itself and are thus referred to as an
ODU.
OSPF Open Shortest Path First – A common routing algorithm.
P
PLDM Path Loss Data Multicast message is sent every sixty seconds and
contains information on messages received or lost.
POP3 Post Office Protocol 3 – A protocol for exchanging e-mail messages between
host computers. See also SMTP.
PMUX Port Multiplexing – Each port of the SDMS is individually configured from the
NMS port (hub) to port (remote) multiplexing.
PSTN Public Switched Telephone Network – Refers to the world’s public circuit-
switched telephone network governed by technical standards created by the
ITU-T, using telephone numbers for addressing. A mixture of digital and analog
telephone systems, the network includes mobile as well as fixed (land-line) tele-
phones.
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