User's Manual

Chapter 1: Introduction
98-131305-A The Inmarsat BGAN system 8
The BGAN services supported by EXPLORER 325
Supported services
The BGAN services currently supported by the EXPLORER 325 comprise:
• A Packet-Switched (PS) connection to the Internet
• A Circuit-Switched (CS) dialed connection for voice, fax or data
• Short Messaging Service (SMS)
Packet data service
The BGAN network supports different classes of data connection to the Internet.
• Using a Standard IP connection several users can share the data connection simultaneously.
This type of connection is ideal for e-mail, file transfer, and Internet and intranet access. The
user pays for the amount of data sent and received.
• Using a Streaming IP connection you get an exclusive high-priority connection ensuring
seamless transfer of data. This type of connection is ideal for time critical applications like live
video over IP. The user pays for the duration of the connection (per minute charge).
Circuit-Switched (dialed) service
The following types of circuit-switched connection are available:
• Standard Voice. A low-tariff connection for voice only. The voice signal is compressed to
4.0 kbps, which reduces the bandwidth use and consequently the tariff.
• 3.1 kHz Audio. A high quality connection which can be used for Premium Voice or G3 fax. The
signal is uncompressed 3.1 kHz audio, which allows for optimum voice quality.
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SMS service
The BGAN system provides a Short Messaging Service (SMS) for sending and receiving SMS
messages to and from the terminal.
Note
The BGAN system supports maximum 11 concurrent PS connections at a time per
EXPLORER 325 system.
1. The 3.1 kHz service is only available in elevations > 45°
Note
The BGAN system only supports one external circuit switched call at a time per
EXPLORER 325 system.