> 11.18 | ATD*99# Request GPRS service

> This command causes the MT to perform whatever actions are necessary to establish a communication between the TE and the external PDN.
> The V.250 'D' (Dial) command causes the MT to enter the V.250 online data state and, with the TE, to start the specified layer 2 protocol. No further commands may follow on the AT command line. GPRS attachment and PDP context activation procedures may take place prior to or during the PDP startup if they have not already been performed using the AT+CGATT and AT+CGACT commands.
> Examples on how to use this command are provided in "Section 11.22, Using GPRS AT commands (Examples)".
> To confirm acceptance of the command before entering the V.250 online data state command will respond with CONNECT.
> When the layer 2 protocol has terminated, either as a result of an orderly shut down of the PDP or an error, the MT enters V.250 command state and returns NO CARRIER (for details refer to Section 11.5.1, Automatic deactivation of PDP context during dial-up PPP).
> Syntax

> Exec Command ATD*99[* [<called_address>][* [<L2P>][* [<cid>]]]]#
> Response(s)
> CONNECT
> NO CARRIER

> Reference(s) |  | PIN |  | ASC0 | ASC1 | USB | MUX1 | MUX2 | MUX3 |  |  | Charge | Q | Last
> GSM 07.07 |  | + |  | + | + | + | + | + | + |  |  | - | - | +

> Parameter Description

> <called_address>(str)

> This parameter is currently not used and needs not to be specified.

> <L2P>(str)

> Layer 2 protocol to be used between the TE and MT.
> “PPP“
> layer 2 protocol PPP
> “1“
> layer 2 protocol PPP

> <cid>(num)

> Parameter specifies a particular PDP context definition (see AT+CGDCONT command). If no context is specified, an internal context with default properties is used (see AT+CGDCONT, AT+CGQREQ and AT+CGQMIN).
> 1...2
> Notes

> • | If TC65 is in dedicated mode, command returns the result code BUSY.

> • | ATD is used as a standard V.250 AT command, too.

> • | When using the command on the second serial interface please see also Section 1.9.