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GTR64 http://www.matrix.es/GTR64
Voice Features
Telephony
Emergency calls
Full Rate, Enhanced Full Rate, Half Rate and Adaptive
Multi-rate (FR/EFR/HR/AMR)
Noise suppression and echo cancellation
Sidetone/microphone amplification
Short Message Service (SMS) Features
Text and PDU
Point to point (MT/MO)
Cell Broadcast
Internet Protocols
TCP/UDP/IP protocol stack
Extensive AT command access to TCP/IP stack
Multi sockets (up to 15) through AT commands
Non blocking listening/server capability
IPv4 protocol
Dynamic & static IP address allocation
PPP protocol (PAP)
Embedded Application
Multiple UART access
Embedded script interpreter
Extensive API library
Embedded application script downloads over the air
using GPRS
1.3 GTR-64 Wireless modems in a Communication System
Figure 1 and Figure 2 illustrate the main blocks of a wireless communication system using the wireless
modem. Figure 1 shows the communication system when a micro-controller is used. They also show the
communication principles of the system and the interface between the wireless modem and the
application and Figure 2 shows the communication system when the script is embedded on the wireless
modem. The definitions in the figures, as used elsewhere in this manual, are in accordance with the
recommendations of 3GPP TS 27.007.
The MS (mobile station) represents the wireless modem and SIM card. The wireless modem excluding
SIM card, is known as the ME (mobile equipment).
The DTE (data terminal equipment) is the controlling application. This can be either an external host or
an internal embedded application.
The DCE (data circuit terminating equipment) is the serial communication interface of the MS.
GTR64 Integrators Manual V.1.2 Pag. 7
Preliminary. Subject to change without prior notice