Insys GPRS 4.2 11-02-01-03-10.008 Benutzerhandbuch

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Manual Supplement Insys GSM/GPRS 4.0 

 

 

Version 1.0 / 07.03

 

All connections (channels) have to be opened by the GPRS device. 
 
Please refer to your provider, whether a VPN (Virtual Private Network) is 
available for this functionality, which allows at least the access from a verified 
address out of this VPN. 
 

The device has to be logged in to the GSM network before a GPRS attach. For 
this, the INSYS GSM/GPRS 4.0 provides the possibility to store the PIN of the SIM 

card permanently that the device is able to log in to the GSM network 
automatically for every restart. 
The command AT**PIN is available for this. Please refer to the user’s manual of 
the INSYS GSM 4.0 for more detailed information about this. 
 
Entering the PDP context with the APN of the GPRS provider is also required: 

AT+CGDCONT=1,IP,<APN-Address> 
The <APN-Address> for Vodafone (D2) is e.g.: VOLUME.D2GPRS.DE 
 
More providers can be found ion the table under “General ! Requirements ! 
GPRS”. 
 
Basically it is possible to define different PDP contexts, this one here is stored as 
context “1”. 
Attention: The PDP context cannot be stored. It has to be re-defined after each 
restart of the device. 
 
Note: 
Using AT commands it is also possible to request a specific QoS profile (Quality 
of Service) from the provider at connection set-up (AT+CGQREQ) or to define a 
minimum profile (AT+CGQMIN). The QoS has to be at least above it that the 

device sets-up a connection. 
The QoS profile contains e.g. values like data rate per hour, max. data rate, 

delay times, etc. 
Experience has shown that these settings are not successful concerning 
performance improvements (when this document has been drawn up).