2. GT47/GT48 CONTROL TERMINALS
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The Control Terminal supports HR, FR and EFR vocoders. The GT48 also
supports the Adaptive Multi Rate (AMR) type of vocoder.
2.4.4 Data
The Control Terminal supports the following data protocols:
•
GPRS (General Packet Radio Service).
The Control Terminal is Class B, which provide simultaneous
activation and attachment of GPRS and GSM services. GT47 is a GPRS
class 8 (4+1) enabled devices, which are capable of transmitting in one
timeslot per frame (up link), and receiving at a maximum of four
timeslots per frame (down link).
•
CSD (Circuit Switched Data).
The Control Terminal GT47 is a capable of establishing a CSD
communication at 9.6kbps.
•
HSCSD (High Speed Circuit Switched Data).
The Control Terminal supports HSCSD class 2 (2+1) communication,
with one timeslot per frame capacity in the up link and two timeslots
per frame capacity in the down link.
2.4.5 Fax
The Control Terminal allows fax transmissions to be sent and received by
commercial fax software installed on the application computer. Group 3 fax
Classes 1 and 2 are supported.
2.4.6 Supplementary Services
• Call forwarding
• Call hold, waiting and multiparty
• Calling/called number identification
• Advice of charge
• USSD
• Alternate line service
• Customer service profile
• Preferred networks
• Operator selection
• Network registration
• Call barring
• Call transfer