Comtech EF Data Vipersat 564L Guide de l'utilisateur Page 167

  • Télécharger
  • Ajouter à mon manuel
  • Imprimer
  • Page
    / 176
  • Table des matières
  • MARQUE LIVRES
  • Noté. / 5. Basé sur avis des utilisateurs
Vue de la page 166
Appendix E - Glossary E-5
MN/22137, rev 1
GIR Guaranteed Information Rate
Group ID A number assigned to equipment which defines it as a member of a group when
addressed by the VMS Hub Controller.
GUI Graphical User Interface – A form of graphical shell or user interface to a
computer operating system or software application.
H
H.323 A protocol standard for multimedia communications designed to support real-
time transfer of audio (such as voice over IP) and video data over packet
networks. Quality of Service is a key feature of H.323. An alternative to SIP.
HCC Hub Channel Controller – A dedicated Hub demodulator that has been desig-
nated as the ECM (ECMv2) controller, and which provides the TAP multicast
message to the Remotes.
HDLC High Level Data Link Control – A standard defining how data may be transmit-
ted down a synchronous serial link.
HPA High Power Amplifier – The amplifier used in satellite communications to raise
the transmit signal to the correct power level prior to transmission to satellite.
HTTP Hyper Text Transfer Protocol – The Internet standard for World Wide Web
(WWW) operation.
Hub The central site of a network which links to a number of satellite earth sites
(Remotes).
I
ICMP Internet Control Message Protocol
IDU Indoor Unit – In a VSAT system, the satellite modem is referred to as the IDU.
IF Intermediate Frequency – In satellite systems, IF frequencies are usually
centered around 70/140 MHz (video/TV), or 1200 MHz (L-band).
IFL Intra-Facility Link – The coaxial cabling used to connect the satellite ODU to
the IDU. Carries the inbound and the oubound signals, and the 24 VDC for the
LNB.
Vue de la page 166
1 2 ... 162 163 164 165 166 167 168 169 170 171 172 ... 175 176

Commentaires sur ces manuels

Pas de commentaire