User's Manual

HAYES AT COMPATIBLE COMMAND SET

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234839, Revision 2.2

Type: ATI2 <CR>

Your command will be ignored. This is because the modem assumes you are typing characters to be

sent to a remote system.

Now type an escape sequence. Do not type any characters for one second, type +++ rapidly and wait

another full second. The modem responds with an OK message.

You may now view the modem’s firmware identity.

Type: ATI2 <CR>

The H0 command is used to hang-up and end the test.

Type: ATH0 <CR>

Unlike the other commands, you should not type AT before the escape sequence, or type a carriage

return after it. Instead, wait a full second before you type the escape sequence and then a full second

after typing it. As soon as the modem returns to local command state, it will respond with the message:

This waiting period before and after the escape sequence is called the Escape Sequence Guard Time. This

allows the modem to distinguish the escape sequence from the normal flow of information between

modems.

You can change the character used for the escape sequence by changing the value of ‘S’ Register 2.

You can change the length of the escape sequence guard time by changing the value of ‘S’ Register 12.

Response Codes

Your modem is capable of telling you, with on screen messages, what it is doing. These messages are

known response codes or result codes, and you will see them from time to time.

For example:

After a command is successfully executed, the response is: OK