Any AT command received, except the listed commands, are acknowledged with OK status. This allows existing modem applications to transmit commands without causing an error. These include AT<X>n, but not currently AT&<X>n, AT%<X>n, AT\<X>n, where <X> is a letter.
Table 16 AT Commands
Parameter
Command
Description
Enter Command mode | <delay>+++<delay> |
| If the string +++ is seen in data mode, with no | ||
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| characters sent for 1 second before or after, then | ||
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| command mode is entered. |
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|
|
|
| ||
Initiate Connection | ATD <destination> |
| Standard modem dialing command, redefined to | ||
Command |
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| initiate an internet connection to a remote computer. | ||
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| Indicates the IP address of the target, and optionally | ||
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| the TCP port number to use for connection. The T or | ||
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|
| P option (ATDT or ATDP) can be present and has | ||
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|
| no effect. |
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|
| If present, the IP address must be exactly 12 decimal | ||
|
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| digits with 3 for each byte of the address. |
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|
|
|
| If no IP address is given, then the ecable destination | ||
|
|
| address defined for the port is used. |
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|
|
| If the destination TCP port is defined, it is separated | ||
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| from the IP address by a '#' character, and is 1 to 5 | ||
|
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| decimal digits. |
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|
|
|
| If TCP port is defined, the ecable destination port | ||
|
|
| defined for the serial port is used. If the destination | ||
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| port is 0, the standard Telnet port (23) is used. | ||
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|
| If the destination string ends with a semicolon, the | ||
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| server remains in the command mode, not the data | ||
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| mode, once a connection is made. |
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|
|
| In command mode data is not passed from the | ||
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| remote computer, so data could be lost if the unit | ||
|
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| stays in command mode. |
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| If the connection cannot be attempted, NO CARRIER | ||
|
|
| status is returned. If the connection attempt fails, NO | ||
|
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| ANSWER status is returned. |
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|
|
| If the connection succeeds, CONNECT status is | ||
|
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| returned. |
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|
Echo control | ATEn |
| If n=0, commands are not echoed. |
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| If n=1, subsequent commands will be echoed. | ||
|
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| The default, upon unit reset, is for no echo (ATE0). | ||
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| ||
Disconnect | ATHn |
| If n=0, any connection to a remote host is dropped. | ||
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| Other value of n is ignored. |
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| ||
Return to data mode | ATOn |
| Exits command mode and places the serial port in | ||
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| the data mode. |
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| All subsequent data is sent to the network |
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|
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| application, if connected, until an enter command | ||
|
|
| mode sequence is received. Any value of n is | ||
|
|
| ignored, if present. |
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Accessing Configuration Parameters | silex | Page 31 | |||
Part Number
