User's Manual Part 1

AT Commands 61
P/N 90023363 Revision 1.8
ATDL
Description: DIAL LAST NUMBER
This command will instruct the modem to originate a call to the last
telephone number used by the modem. The modem attempts to set up an
outgoing call.
This command can be stopped by receiving a character during execution,
except during some states of connection establishment such as
handshaking.
Syntax: ATDL[;]
Parameters: ;which signifies the call is a voice call and instructs the modem to return to
the command mode.
Response: If there is no dial tone, the modem will return the string:
NO DIALTONE
where the command ATX has been set to 2 or 4.
If there is no last number to dial or the number is invalid, the modem will
return the string:
+CME ERROR: <error>
If the connection is busy, the modem will return the string:
BUSY
where the command ATX has been set to 3 or 4.
If the connection cannot be established, the modem will return the string:
NO CARRIER
If the connection is successful and is non-voice call, the modem switches
to data state and the modem will return the string:
CONNECT<text>
where <text> is only displayed if the command ATX has been set to a value
greater than 0.
If connection successful and is a voice call, the modem will return the
string:
OK
When the modem releases the call and returns to command mode, it
returns the string:
OK