VEGA INSYS Modem GPRS 5.0 - Manual (Page 59)

INSYS GPRS 5.0 serial Functions
59
Save the extended functions
Automatic acceptance of an incoming CSD call
(for the call of a service center modem)
Save setting for ATS0
Perform RESET, accept all parameters AT**SAVE
ATS0=2
AT&W
AT**RESET
Note
A connection can be established independent from the callback set-
tings via SMS command (provided that the sender number is stored
at AT**CLIP<index>=<n>).
6.3 Defined termination of GPRS connections for incoming
CSD calls ("CSDPRIO")
For different applications, it is necessary to access them with CSD data connections, al-
though the normal operation runs with TCP connections.
The reasons may be as follows:
• To perform time-critical applications (e.g. software updates from controllers).
• To enable service technicians to access the application or the INSYS GPRS 5.0 se-
rial, which are not integrated in the communication system based on TCP connec-
tions.
• To still have remote access to the application in case the GPRS network fails.
• To still have remote access to the application in case the TCP infrastructure of the
control center fails.
• The basic requirement for the utilization of CSDPRIO is the support of the selective
call acceptance (AT**CLIP=1). Two modes are available: In the first mode
(AT**CSDPRIO=1), only authorized calls may trigger this function and terminate
the connection. In the second mode (AT**CSDPRIO=2), any caller may terminate
the connection.
• If during the CSD call the following applies:
o A TCP connection is established: It will be terminated (NO CARRIER); some
topics must be observed due to the nature of this:
In some cases (depending on the provider), the TCP RST which the
INSYS GPRS 5.0 serial creates in this case to terminate, the connec-