Software Interface; Format For The At Commands - Enfora Enabler II-G Integration Manual

Integration Guide
Version 1.01

9.0 Software Interface

9.1 Software Interface
The application sends commands to the Enfora Enabler II-G module via the 60-pin I/O signal connector.
These commands use the Enfora AT Command Set and/or Enfora's Packet API.
The Enfora Enabler II-G module operates in one of the following modes:
•
Command mode: Used for configuring the Enfora Enabler II-G module, for interrogating the GSM
network, and for placing and receiving calls. It uses the AT command set via the serial port for
communication.
• On-line mode: Used after a circuit-switched data call has been established. Data is passed between
the Enfora Enabler II-G module and the controlling application without command interpretation. The
only AT command that is interpreted in On-line mode is the +++ command. (This command places the
Enfora Enabler II-G module in Command mode but does not terminate the circuit-switched data call.)
•
IP Packet /API Mode: Used to read/write modem parameters, interrogate network information, and
place and receive calls in real-time, multi-tasking mode. The Packet API mode is facilitated over a PPP
connection and the packets can be constructed according to the information provided in the Enfora
GSM-GPRS Family UDP-API Reference GSM0102PB002MAN. Enfora GSM-GPRS Family Modem
Control Library Reference GSM0000PB006MAN provides detail of the UDP Modem Control Library that
has three levels: port , messaging, and modem libraries. Each of the three levels contains one or more
libraries. For example, the port libraries layer has UDP PPP Port, UDP Socket Port, and COM Port
libraries. All libraries are provided as a part of the Enfora Enabler II-G Integration Toolkit.
The AT command driver of the Enfora Enabler II-G module never exits the Command state, that is, it never
enters the On-line mode. Although the host interface may not be able to access the AT command
interpreter, it is always running and is available via the API Mode over a PPP connection and/or via the RF
interface.
• In the Command state, characters that are received from the Customer Premise Equipment (CPE) are
treated as AT commands by the Enfora Enabler II-G module.
•
In response to the commands received from the CPE, the Enfora Enabler II-G module sends characters
(AT commands) to the CPE.
•
Various events can also trigger the Enfora Enabler II-G module to send characters (AT commands) to
the CPE.

9.2 Format for the AT Commands

The general format of the command line is: <prefix> <command> <CR>
<prefix>
AT
<command> See AT Command Manual
<CR>
0X0D
The prefix AT obtains synchronization, identifies the character parameters, and indicates that a command
may be in the following characters.
AT commands are not case sensitive: use either capital letters or lower-case letters for the AT command.
Note: Some AT Command parameter values ARE case sensitive and are documented in the Enfora
Enabler-G AT Command Set Reference - GSM0102PB001MAN.
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