SARA-R4/N4 series - AT Commands Manual
UBX-17003787 - R09
13 Packet switched data services
Page 128 of 307
Parameter
Type
Description
•
50: 3G minimum QoS traffic priority - <param_val> selects the acceptable value for
the traffic priority:
o
0 (factory-programmed value): subscribed
o
1: priority 1
o
2: priority 2
o
3: priority 3
•
51: 3G Minimum QoS transfer delay - <param_val> is the value for the transfer delay
in milliseconds. The factory-programmed value is 0.
•
100: map the +UPSD profile to the specified <cid> in the
table.
o
1: map the current profile to <cid> 1
o
2: map the current profile to <cid> 2
o
3: map the current profile to <cid> 3
o
4: map the current profile to <cid> 4
o
5: map the current profile to <cid> 5
o
6: map the current profile to <cid> 6
o
7: map the current profile to <cid> 7
o
8 (factory-programmed value): map the current profile to <cid> 8
13.4.4 Notes
• For the description of the QoS parameters, see 3GPP TS 22.060 [
].
• The maximum length of <param_val> if <param_tag> is equal to 2 or 3 is 64.
SARA-R4 / SARA-N4
• The only supported <profile_id> is 0.
• The only supported <param_tag> is 0 (IP type).
13.5 GPRS attach or CGATT
+CGATT
SARA-R404M SARA-R410M-01B SARA-R410M-02B SARA-R410M-52B SARA-R412M
Modules
SARA-N4
Syntax
PIN required
Settings saved Can be aborted
Response time Error reference
Attributes
full
Yes
No
Yes
13.5.1 Description
Register (attach) the MT to, or deregister (detach) the MT from the GPRS service. After this command the MT
remains in AT command mode. If the MT is already in the requested state (attached or detached), the command
is ignored and OK result code is returned. If the requested state cannot be reached, an error result code is
returned. The command can be aborted if a character is sent to the DCE during the command execution. Any
active PDP context will be automatically deactivated when the GPRS registration state changes to detached.
The user should not enter colliding requests (e.g. AT+CGATT=1 and AT+CGATT=0) on different
communication ports, because this might cause interoperability issues in case overlapping attach and
detach requests are not handled by the network, and could result in an unpredictable registration
state. Similarly, when notified of a mobile terminated GPRS detach event (e.g. via +CGEV URC), it is
recommended to wait a few seconds before entering AT+CGATT=0 in order to let the pending attach
procedure (automatically triggered by the module in most cases) successfully end.
SARA-R4
If MT is configured in class "B" (see the
+CGCLASS
AT command) and the GSM registration has not
yet been performed, AT+CGATT=1 triggers both GSM and GPRS registration. If the command is aborted
before the PS registration has ended, the CS registration is completed and the MT goes into class "CC".
The deregistration action is carried out even if the command is aborted.
13.5.2 Syntax
Type
Syntax
Response
Example
Set
AT+CGATT=[<state>]
OK
AT+CGATT=1
