Hughes BGAN 9201, User Manual

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BGAN Terminal User's Guide
This service requires subscription with a Dynamic DNS
provider.
Static DNS Server: If you are using static IP addressing, Inmarsat
recommends that you use a static DNS server. If you select
this option, you must enter the IP address of the Primary DNS
Server. This is supplied by your Internet Service Provider.
Optionally, you can enter the IP address of a Secondary DNS
Server, also supplied by your ISP. This is used in the event of
failure of the Primary DNS Server.
Error correction: Error correction ensures that very little data is lost
during transfer by asking for dropped packets to be resent.
However, because it holds subsequent data whilst the packet is
being resent, you may notice some jitter or delay in the received
data. This is normal for most data types.
For real-time applications, such as Voice over IP (VoIP) or video,
you may find that the level of jitter or delay is too great. In this
case, it is recommended that you remove error correction.
Removing error correction minimizes delay and jitter, but note
that a small amount of data may be lost during transfer,
because dropped data packets are not resent.
Ethernet: Ethernet is a local area networking method used widely
throughout the computer industry. It is one of the three
communications interfaces supported by the Satellite Terminal.
Fault Code: A number which uniquely references an error in a
hardware or software system. In the Satellite Terminal, if there is a
fault detected, the fault code and a description are displayed
at the bottom of the Mobile Terminal Control Pad Home and
Status screens.
GPS: Global Positioning System. When the GPS receiver in the
Satellite Terminal gets a bearing on a GPS satellite, the receiver
computes and stores the Terminal’s location on earth. That
location is used in the Pointing Process to obtain your location
relative to the Regional BGAN Satellite.
Header Compression: A header is the component of a data packet
that precedes the data that you are sending. The header
contains information such as source and destination address,
error checking and other administrative details. In most data
types this does not noticeably affect the data transmission rates.
However in multimedia applications such as voice and video,
the header can significantly affect performance.