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.
ISDN. A high quality connection which can be used for voice (3.1 kHz
•
Audio), G4 fax or 64 kbps UDI/RDI data.
Note
The BGAN system only supports one Circuit Switched call at a time
per TracPhone system.
SMS service
The BGAN system provides a Short Messaging Service (SMS) for sending and
receiving SMS messages to and from the terminal.
Supplementary services
The BGAN system also provides the following supplementary services:
•
Call hold
•
Call waiting
•
Call forwarding
•
Voice mail
•
Call barring
The Inmarsat BGAN system
Chapter 1: Introduction
15