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GSM0128IG001
44
Revision Draft – 9/22/08
7.0 Modes of Operation
GSM/GPRS supports many optional services and modes. The Enfora Enabler IIG module supports the
following GSM/GPRS services:
Short-Message Services (SMS)
Class B GPRS Functionality
Voice
communication
7.1 Enabling the Transmission Modes for the GSM/GPRS Services
Each of the GSM/GPRS services has two modes that can be enabled separately:
Mobile-originated (MO): allows the making of a service request (such as, making a telephone call or
sending an SMS)
Mobile-terminated (MT): allows receiving a service request (such as receiving a telephone call or an
SMS)
Note:
Contact your local GSM operator to ensure that the services and modes have been provisioned
for the SIM.
7.2 Voice Communication
The Enfora Enabler IIG module has full voice capabilities, provided the necessary connections have been
made for the speaker and microphone pins on the 60-pin I/O connector. The
GSM0128 AT Command Doc
has the entire list of commands that can be used to control the voice functionality. The quick start guide in
this manual provides a basic command set that can be used to initialize and test the voice functionality.
The Enfora Enabler IIG module supports three vocoder compression algorithms for voice communication:
Full-Rate, Enhanced Full-Rate (EFR), Adaptive Multi Rate (AMR), and Half-rate (HR).