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 +CGDCONT 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
13.4.4î™–î™–î™–î™–Notes
• For the description of the QoS parameters, see 3GPP TS 22.060 [50] and 3GPP TS 23.060 [10].
•
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).
13.5î™–î™–î™–î™–GPRS attach or detach +CGATT
+CGATT
SARA-R404M SARA-R410M-01B SARA-R410M-02B SARA-R410M-52B SARA-R412MModules
SARA-N4
Syntax PIN required Settings saved Can be aborted Response time Error referenceAttributes
full Yes No Yes Up to 3 min +CME Error
13.5.1î™–î™–î™–î™–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.
13.5.2î™–î™–î™–î™–Syntax
Type Syntax Response Example
Set AT+CGATT=[<state>] OK AT+CGATT=1
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