GM28 INTEGRATOR’S MANUAL
112
LZT 123 7468 R1A
6.2 AT+CGATT
GPRS Attach or Detach
Used to attach the MS to, or detach the MS from, the GPRS/packet
domain service. After the command has completed, the MS remains in
V.250 command state. If the MS is already in the requested state, the
command is ignored and the OK response is returned. If the requested
state cannot be achieved, an ERROR or +CME ERROR response is
returned. Extended error responses (enabled by the +CMEE command)
are listed under “+CME ERROR (Mobile Equipment Error Code)”,
page 59.
Any active PDP contexts will be automatically deactivated when the
attachment state changes to detached.
Note!
This command has the characteristics of both the V.250 action and
parameter commands. Hence it has the read form in addition to the
execution/set and test forms.
Description
Command
Possible Responses
Attach or detach MS
to the GPRS/packet
domain/packet
domain service
+CGATT=[<state>]
• +CME ERROR: <err>
• OK
• ERROR
Read the command
+CGATT?
• +CGATT: <state>
• OK
• ERROR
Test if the command is
supported
+CGATT=?
• +CGATT: (list of
supported <state>s)
• OK
• ERROR
<state>
Description
0
Detached
1
Attached
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