Westermo GD-01 - Manual (Page 165)

165 6196-2220
'D' – Request GPRS IP service
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.The MT return CONNECT to con-
firm acceptance of the command prior to entering the V.25ter online data state. No fur-
ther commands may follow on the AT command line.
The detailed behaviour after the online data state has been entered is described briefly in
clause 9, for IP, of GSM 07.60. GPRS attachment and PDP context activation procedures
may take place prior to or during the PDP startup if they have not already been per-
formed using the +CGATT and +CGACT commands.
If is supported, its usage is the same as in the +CGDATA command.The +CGD-
CONT, +CGQREQ, etc. commands may then be used in the modem initialisation AT
command string to set values for for PDP type, APN, QoS etc...
If is not supported or is supported but omitted, the MT attempt to activate the
context using:
(a) any information provided by the TE during the PDP startup procedure, e.g. the TE may
provide a PDP type and/or PDP address to the MT,
or, (b) a priori knowledge, e.g. the MT may implement only one PDP type,
or, (c) using the 'Empty PDP type' (GSM 04.08). (No PDP address or APN is sent in this
case and only one PDP context subscription record is present in the HLR for this sub-
scriber.)
Syntax:
D*[***]#
Response Syntax:
CONNECT
ERROR
Defined Values:
(GPRS Service Code for IP) a digit string (value 99), which identifies a request to use the
GPRS with IP (PDP types IP and PPP)
:
A digit string which specifies a particular PDP context definition.
Command example Possible responses Note
ATD*99***1# CONNECT Successful “connection”
ATD*99***2# ERROR
B A C K