Chapter 3:  AT Commands Reference
 April 15, 2008 G24-L AT Commands Reference Manual 3-243
The following table shows the D*99 parameters.
Example
ATD*99 //Try connecting to GPRS according to the first <cid>, defined in 
+CGDCONT
Table 3-159: D*99 Parameters
<Parameter> Description
<GPRS_SC> 
(GPRS Service 
Code)
Digit string (value 99) which identifies a request to use GPRS.
<called_addres
s>
String that identifies the called party in the address space applicable to the PDP. For 
communications software that does not support arbitrary characters in the dial string, 
a numeric equivalent may be used. Also, the comma character "," may be used as a 
substitute for the period character ".". 
For PDP type OSP:IHOSS, the following syntax may be used for 
<called_address>:[<host>][@[<port>][@
[<protocol>]]] where <host>, <port> and <protocol> are defined in “+CGDCONT, 
Define PDP Context” on page 3-232. 
For communications software that does not support arbitrary characters in the dial 
string, a numeric value equivalent to the hostname may be used. However, this should 
be avoided if at all possible.
<L2P> String variable which indicates the layer 2 protocol to be used. 
For communications software that does not support arbitrary characters in the dial 
string, the following numeric equivalents are used:
0 NULL
1PPP
2PAD
3X25
9 yyyy M-xxxx 
Other values are reserved and result in an ERROR response to the Set command.
Note: V.250 (and certain communications software) do not permit arbitrary characters 
in the dial string. The <L2P> and <called_address> strings are therefore specified as 
containing digits (0-9) only.
<cid>: Digit string which specifies a particular PDP context definition (See “+CGDCONT, 
Define PDP Context” on page 3-232).