Data Communication; Mobile Packet Data Service (Rs-232); Introduction - Furuno Felcom 30 Operator's Manual

6.

DATA COMMUNICATION

6.1

Mobile Packet Data Service (RS-232)

6.1.1

Introduction

The Mobile Packet Data Service complies with the communication protocol
defined by the Inmarsat system.
The transmission data rate over the satellite link is typically 20 kbps (a 64 kbps
channel is shared with other users).
Switching between MPDS and Mobile ISDN service is done from the PC.
The PC must have Win 2000 or Win XP installed.
With MPDS you only pay for the amount of data received or transmitted, rather
than for the time you are connected.
MPDS can be efficient for applications that involves brief bursts of
communication followed by periods of inactivity, such as:
E-mail
Internet/intranet
Navigational updates
Scada
Database queries
E-commerce
VPN - Virtual Private Network
FELCOM 70
PC w/Windows
2000 or later
FELCOM 50 FELCOM 30
SBS (Shared Base Station) assigns channels to
the MPDS user and handles the MPDS
communication. Terminals in MPDS mode share
data channels with other users.
RLES (Regional Land Earth Station) sets terminal
in MPDS list. A terminal can not receive a voice
call when in MPDS mode.
Home LES (Home Land Earth Station) gives
access to MPDS service like Internet/e-mail. It
also handles the MPDS biling system.
System Overview
Land
Earth
Station,
LES
R
LES
SBS
Home
Internet
LES
6-1