Siemens MC55 - Manual (Page 272)

MC55 AT Command Set
10.15 ATD*99#
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MC55_ATC_V01.05 Page 272 of 469 2/10/04
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10.15 ATD*99# Request GPRS service
Syntax
Command Description
This command causes the MT to perform whatever actions are necessary to establish communication between
the TE and the external PDN.
The V.25ter 'D' (Dial) command causes the MT to enter the V.25ter 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. If the context to be used is already activated,
it will be deactivated first. This ensures that the right context parameters will be used (e.g. QoS changes since
the last context activation or the called address specified by
ATD*99#
).
Examples on how to use this command are provided in chapter "
Using GPRS AT commands (Examples)
".
To confirm acceptance of the command before entering the V.25ter 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.25ter command state and returns NO CARRIER.
Parameter Description
IP V4 address in the form w.x.y.z, which identifies the called party; if it is provided, the MT will automatically set
up a virtual call to the specified address after the context has been activated. This parameter is currently not
used and needs not to be specified.
Layer 2 protocol to be used between the TE and MT.
“PPP“ layer 2 protocol PPP
“1“ layer 2 protocol PPP
Exec Command
ATD*99
[* [
<called_address>
][* [
<L2P>
][* [
<cid>
]]]] #
Response(s)
CONNECT
NO CARRIER
PIN ASC0 ASC1 MUX1 MUX2 MUX3
% % § % § §
Reference(s)
GSM 07.07
<called_address>
(str)
<L2P>
(str)