User's Manual

Eagle II GSM Radio Module Technical Manual Preliminary Draft: 08/31/00 28

Part Number: 07100017 version 00.04

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INITIALIZATION AND SETUP EXAMPLES

In the GSM vocabulary, a call from GSM mobile to the PSTN is called a "mobile-

originated call" or "outgoing call." A call from the fixed network to a GSM mobile is called

a "mobile-terminated call" or "incoming call."

In the following examples, “App” refers to the application. The following convention

describes the direction of the data exchange:

The data exchange from the customer application to the Eagle II module is

designated as:

App > Eagle

The data exchange from the Eagle II module to the customer application is

designated as:

Eagle> App

Note:

With the exception of the +++ command (Online Escape Sequence), all

commands must be preceded by the AT attention code (or command prefix) and

terminated by pressing the <CR> character.

In the following examples, the <CR> and <CR><LF> are intentionally omitted for

clarity and space.

Initial Response to the AT Command

After power is applied to the Eagle II module, the module performs a power-up self-test.

The self-test completes within

TBD

seconds. When queried with the AT command, the

Eagle II module responds with one of the following result codes:

OK signifies that the Eagle II module is ready, that it correctly interprets the AT

command, and that it can execute the command.

ERROR signifies that the Eagle II module does not understand the command or that

the command is invalid.

App > Eagle

Eagle > App

OK Command valid: module is ready

The Eagle II module must be in Command mode when any command is entered (with the

exception of the online escape sequence +++). Commands entered when the module is

in Online mode are treated as data, and are transmitted as such to the receiving module.