INSYS GPRS 5.1 serial
Connection
35
The number of dialing attempts for the leased line mode can be limited with
AT**LLWAITRST=<n>
. For example, the INSYS GPRS 5.1 serial is restarted with
AT**LLWAITRST=3
after the third dialing attempt (20s+80s+320s). This will re-
start the dialing cycle. The default value for this setting is 255.
Note
This setting increases the availability of the INSYS GPRS 5.1 serial
and its application. However, due to the increased number of dial-
ing attempts that are performed shortly one after the other, higher
connection costs may occur. This depends on the terms of the con-
tract with the mobile network provider.
5.2.7
Connection acceptance
Use the function TCP listen to accept incoming TCP connections.
Alternatively, the settings can be entered or modified using the terminal pro-
gram.
Incoming connections are indicated in the
terminal program.
RING
The connection acceptance takes place ei-
ther automatically or after a set number
<n>
of ring signals
ATS0=<n>
or manually.:
ATA
The connection was accepted.
CONNECT
As soon as the INSYS GPRS 5.1 serial has displayed the message PPP-IP SETUP, it
can be reached by incoming TCP connections, i.e. it is in Listen mode at the TCP
port which has been set with the command AT**TCPLISTENPORT.
Outgoing TCP connections can still be established.
Please note:
Not all AT commands can be used in the operating mode "TCP Listen".
Please find an overview in the Chapter "7. AT commands".
The INSYS GPRS 5.1 serial is able to independently and periodically check its status
in the GPRS network and thus its availability. Use the command AT**PPPIPCHECK.