User's Manual

39
Appendix II
AT Commands
ATDT
Execution Command – GSM Response
ATDT[Phone_Number]<CR> <CR><LF>CONNECT(INFO)<CR><LF>
<CR><LF>NO CARRIER<CR><LF>(ERR_STR)
<CR><LF>[ERR_CODE]<CR><LF>
Execution Command – 3G/GPRS Response
ATDT[IP:Port]<CR>
ATDT[HostName:Port]<CR>
<CR><LF>CONNECT(INFO)<CR><LF>
<CR><LF>NO CARRIER<CR><LF>(ERR_STR)
<CR><LF>[ERR_CODE]<CR><LF>
Example
ATDT0286471166
NO CARRIER
[0x0b01]
ATDT0286471166
CONNECT 9600
ATDT192.168.2.1:1024
CONNECT
ATDT192.168.6.176:21
NO CARRIER
[0x8005]
ATDTgprs.Cipherlab.com.tw:20009
CONNECT
ATDTdynamicIP.xyznet.org.tw:20000
NO CARRIER
[0x9011]
 Make a GSM data call but the remote party
hangs up.
 Make a GSM data call and the remote party
answers the call.
 Connect to a remote host successfully, via
the 3G/GPRS access point.
 Cannot connect to a remote host via
3G/GPRS access point.
 Connect to a remote host by host name
successfully, via the 3G/GPRS access point.
 Cannot connect to a remote host by host
name via 3G/GPRS access point.
Remarks
This command is to dial out for a data connection via GSM or 3G/GPRS (see examples above).
 If successful, the response may include a string after the message “CONNECT” appears,
providing more information on the connection, such as baud rate, and so on.

If a connection fails, the response may include a string after the message, e.g. “NO CARRIER”