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Chapter 1: Introduction
The Inmarsat BGAN system 15
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Introduction
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, G3 fax or analog modems. The signal is uncompressed 3.1 kHz
audio, which allows for optimum voice quality.
• ISDN. A high quality connection which can be used for voice (3.1 kHz
Audio), G4 fax or 64 kbps UDI/RDI data.
SMS service
The BGAN system provides a Short Messaging Service (SMS) for sending and
receiving SMS messages.
Supplementary services
The BGAN system also provides the following supplementary services:
• Call hold
• Call waiting
•Call forwarding
•Voice mail
• Call barring
Note
The BGAN system only supports one CS call at a time per TracPhone
system.
BGAN-X_UM.book Page 15 Wednesday, April 30, 2008 12:48 PM